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Part 8 - AutogirosPart 9 - HelicoptersPart 10 - Gyroplanes

-

_ Compiled from the

INDEX OF AERONAUTICS

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FOREWORDto

SUPPLE~ENTARY BIBLIOGRAPHIES

Since the publication of the original fifty subjects of

this Bibliography, many favorable comments have been received

as to its usefulness. The demand from aeronautical organiza-

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ABBREVIATIONS

D.V.L. - Deutsche versllchsanstalt fUr luftfahrt, Berlin.

C.A.H.I. - Central aero-hydrodyna.mica} instj.tute, Hoseov..

;seances

Royal air force (Great Britain)

N.A.C.A. -- National adviscry committee for aeronaut:.cs .•Washington.

A.R.C. R. & M. - Great Britain. Aeron~utical res8brchcommittee. Reports and Memornnda.

V.D.I. - Verein deutscher ingenieure, Berlin.

A.S.M.E. - American society of mechanical engineers, New York.

Atti Assoc. ital. aerotecn. - Atti dell'bssociazioneitaliana di aerotecnica. Roma.

R.A.S. - Royal aeronautical society (Great Britain)

Rend. Istituto spero aero - Rendiconto dell'Istituto,sperimentale aeronautico, ROT-a.

N.P.L. - National physical laboratory, Teddington, England.

Pub. scient. tech. Min. de l'air. - Publications scienti­fiques et techniques du Ministere de l'ai1'. Servicedes recherches de l'aeronautique, Paris.

C.I.N.A. - Commission ictcrnationale de navigationaerienne, Geneve.

C. R. Acad. sci. - Comptes rendus hebdomadaires desde l'Acad~mie des sciences, Paris.

N.A.A. - National aeronautic association, Washington.

R.A.F.

F.A.I. - F~deration aeronautique internationale, Paris.

S.A.E. - Society of autumotiv€ engineers, New York.

U.S. Govt. print. off. - U.S. Government prlnting office,1tJashington.

H.M. Stat. off. - His Majesty's Stationery office, London.

'vI. G.L. - Wissenschaftliche gesellschaft fUr lUftfahrt, Berlin.

Z.A.M.M. - Zeitschrift fUr angewandte mathematik undmechanik, Berlin.

Z.F.M. - Zeitschrift fUr flugte8hnik und motorluftschiffahrt,r4tinchen.

AUTHOR INDEX•••••••.•••.•.••••••••.••••.•.•.•...•.. 29

Section I

TABLE OF CONTENTS

.8

.8

.9

.9

.9· .10• .10

· .•10· .••11

27

• ••• 14· •• 16· ..17

· .20

• ••• 21• •• 21• •• 21• •• 22• •• 22

• .22• .22

. •• 22· •• 22

• ••• 24• •• 24• •• 24

.25· .•• 25

• .25

...

.1• •••••.•• 3

.4• ••••• 4

..7

... ....

.. ....

..........

GYROPLANES

AUTOGIROS

.... ..... ......

....

....

.....

PART 10

....

....

....

......

...

PART 8

Section III

Section II

PART 9 - HELICOPTERS

Design and Construction •.Development •••••.•••••.••Flight Instruction •••••••Performance and Testing.Theory .Types

Be11 ..........•.••.......Cierva.Hafner.Kcllet ••••••Pi tcairn •••Sauteur.Wilford.

Uses •••••General •••

Design and Construction ••Development .•••••.....•.•Performance and Testing.Theory .Types

Asboth.Baumhauer ••Berliner ••Breguet-Dorand ••••Cierva •••••••D'Ascanio ••••.De Bothezat.....Florine •••••Focke-Wulf ••Hellesen-Kahn••••••.Kellet •••••.Oehmichen•••Pescara ••••.•••Vought-Sikorsky ••

General ••.•••.•.••.

1

Section I

AUTOGIROS

DESIGN AND CONSTRUCTION

Pitcairn model PA-36 direct control autogiro, by D. Rose. Aerodigest, New York, Sep. 1940, v. 37, no. 3, p. 104, 115.illus.

Pitcairn whirl wing, by A. E. Larsen. Aviation, New York, Sep.1940, v. 39, no. 9, p. 46-47, 131. diagrs.

Rotary wing aircraft, by J. A. J. Bennett. Aircraft engineering,London, Jan.-Aug. 1940, v. 12, no. 131-138, p. 7-9; 40-42,44; 65-67, 79; 109-12; 139-41, 146; 174-76; 208-09; 237-41.diagrs., illus., tables.

Construction of autogiros at the Kellett works, by W. V. Trelease.American machinist, New York, Mar. 30, 1940, v. 84, p. 42-44.illus.

Built without wings, by W. V. Trelease. American machinist, NewYork, Feb. 7, 1940, v. 84, p. 20-24. diagrs., .illus.

Autogiro has high service factor. Machine design, Cleveland, Ohio,Feb. 1940, v. 12, no. 2, p. 46, 86. diagrs.

Decisivo progreso tecnico del autogiro sobre los demas aparatosvoladores, POI' Miguel Ramallo. Aeronautica argentina, Cor­doba, Ja~. 1940, v. 7, no. 70-7~, p. 1704-09, 1713. illus.

Frequency and vibration problems of rotors, by Richard S. Prewittand Robert A. Ivagner. Jou~C'nal of the Aeronautical sciences,New York, Jan. 1940, v. 7, no. 3, p. 121. (Second annualrotating wing aircraft meeting)

A New parameter of lifting rotors, by Arthur M. Young. Journalof the Aeronautical sciences, New York, Jan. 1940, v. 7, no.3, p.120. (Second annual rotating wing aircraft meeting)

Notes on autogiro rotor longitudinal stability, by Alexill1derKlemin, Victor R. Haugen and Samuel B. Sherwin. Journal ofthe Aeronautical sciences, New York, Jan. 1940, v. 7, no. 3,p. 121. (Second annual rotating wing aircraft meeting)

Rotor controls, by Harris S. Campbell. Journal of the Aeronau­tical sciences, New York, Jan. 1940, v. 7, no. 3, p. 121.(Second annual rotating wing aircraft meeting)

Stress analysis of rotor blades, by Hugh J. Mulvey. Journal ofthe Aeronautical sciences, New York, Jan. 1940, v. 7, no. 3,p. 121. (Second annual rotating wing aircraft meeting) .

2

AUTOGIROS

Aerodynamics of rotating wing aircraft with blade-pitch control,by A. PflUger. Washington, 1940. 14 p. diagrs. (N.A.CoAoTechnical memorandums no. 929) (From Luftfahrtforschung,MUnchen, June 20, 1939, v. 16, no. 7, p. 355-61)

Autogiro possesses stability which airplane cannot match. Science,New York, Dec. 8, 1939, v. 90, p. 371.

Der Sport und reiseflugzeugbau des auslands, von C. Esche. Zeit­schrift des V.D.I., Berlin, Aug. 1939, v. 83, no. 33, p. 958.

Aerodynamik des drehflUgels mit blattwinkelrUcksteuerung, von AoPflHger. LUftfahrtforschung, MUnchen, June 1939, v. 16, no~

7, p. 355-61. diagr., tables.

Das Neue sprungstart autogiro. Automobiltechnische zeitschrift,Stuttgart, Apr. 1939, v. 42, no. 7, p. 204. i11us.

I Problemi del velivo10 ad ala battente, di G. Serrag1i. Rivistaaeronautica, Roma, Apr. 1939, v. 15, no. 4, p. 37-51. il1uso,tables.

Principles of rotary aircraft, by Alexander Klemin. Journal ofthe Franklin institute, Philadelphia, Feb., Mar. 1939, v o

227, no. 2, 3, p. 219-49; 355-97. diagrs., il1us., tables.

Ein Neuer tragschrauber. Rundschau deutscher technik, Berlin,Jan. 1939, v. 19, no. 1, p. 3. il1us.

Contribution to the aerodynamics of rotating wing aircraft, by G.Sissingh. Washington, 1939. 34 p. il1us., tables.(N.A.C.Ao Technical memorandums no. 921) (From Luftfahrt­forsehung, MUnchen, June 6, 1938, v. 15, no. 6, p. 290-302)

Uber die dynamische stabi1itat des hubschraubers mit ange1eructenflUgeln, von K. Hohenemser. Ingenieur archiv, Berlin, Deco1938, v. 9, no. 6, p. 419-28. il1us •

• euer Cierva tragschrauber. Interavia, Geneva, Nov. 19, 1938,no. 595, p. 5.

Latest jumping autogiro. Flight, London, Nov. 3, 1938, v. 34,no. 1558, p. 382. (Also Aeroplane, London, Nov. 2, 1938,v. 55, no. 1432, p. 537)

Some aerodynamic problems in the design of the convertible aero­plane, by Gerard P. Herrick. Journal of the Aeronauticalsciences, New York, Oct. 1938, v. 5, no. 12, p. 494-97.il1us.

atest opinions and experiences is direct aerodynamic lift, by A.Tripodi. Aircraft engineering, London, Sep. 1938, v. 10,no. 115, p. 290•.

3

DEVELOPMENT

DESIGN AND CONSTRUCTION

control of autogiro17 p. illus.

(From Luftfahrt­283-89. diagrs.)

(A~ Technical encyclopedia,illus.)

Autogiro, by D. and V. Goldschmidt.Moscow, 1938, v. 1, p. 107-08.

And now the autogiro, by Edwa~d Shannon. Military digest, Wash­ington, May 1938, v. 3, p. 31-37. illus.

On rotary aspirations, by R. Hafner. Flight, London, Oct. 21,1937, v. 32, po 407-08. (Alsp Aeroplane, London, Oct. 20,1937, v. 53, p. 478-80)

A Study of the torque equilibrium of an autogiro, by F. J. Bailey,Jr. Washington, U. S. Govt. print. off., 1938. 10 p.illus. (NoAoCoA. Report noo 623)

Performance and control of rotary wing aircraft, by E. B. Wilford.Journal of the Aeronautical sciences, New York, May 1938, v.5, no. 7, p. 278-80. tables.

Beitrag zur aerodynamik der drehflUgelflugzeuee, von G. Sissingh.Luftfahrtforschung, Mlinchen, June 6, 1938, v. 15, no. 6,po 290-3020 tables.

The Stressing of rotor blades, by J. Morris and W. Tye. Aircraftengineering, London, June 1938, v. 10, no. 112, p. 177-79.illus.

Static longitudinal ~tability and longitudinalrotors, by M. Schrenk. Washington, 1938.(N.A.C.A. Technical memorandums no. 879)forschung, June 7, 1938, v. 15, no. 6, p.

Der Hafner tragschrauber, von M. Schrenk. Zeitschrift des V.D.I.,Berlin, July 1938, v. 82, no. 30, p. 890-91. diagrs., illus.

The Missing link in aviation, by John H. Miller. Popular mechanics,Chicago, Sep. 1938, v. 70, no. 3, p. 346-51, l34a-135a.illus.

Belicoptere of autogiro, door Bacho Vliegwereld, Haarlem, Aug. 19,1937, v. 3, noo 29, p. 502. illuso

Die Schwingunesbeanspruchung der rotorblatter von tragschraubern,von A. PflUger. Ingenieur archiv, Berlin, Aug. 1938, v. 9,no. 4, p. 244-58. illus.

The New autogiro. Aeroplane, London, JUly 6, 1938, v. 55, no.1415, p. 34.

La Formule de l'autogire et ses progres, par P. H. Monaud. LesAiles, Paris, Mar. 14, 1940, v. 20, p. 4. illus.

4

AUTOGIROS

Que peut--on attendre de I' autogire dans ses applications civileset militaires? par Georges Favier. La Science et la vie,Paris, Mar. 1940, v. 57, no. 273, p. 179-86. tables.

Decisivo progreso tecnico del autogiro sobre los demas aparatosvoladores, por Miguel Ramallo. Aeronautica argentina, Cor­doba., Jan. 1940, v. 7, no. 70, 71, p. 1704-09, 1713. illus.

Fesselschrauber. Flugsport, Frankfurt AIM, Dec. 20, 1939, v. 31,no. 26, p. 599-600. illus.

Rotary aircraft. Aero di~est, New York, Dec. 1938, v. 33, no. 6,p. 46, 78. illus. (Also U. S. Air services, Washington,Dec. 1938, v. 23, no. 12, p. 30)

Rotating wing aircraft meeting, by Alexander Klemin. Journal ofthe Aeronautical sciences, New York, Nov., Dec. 1938, v. 6,no. 1, 2, p. 30; 73.

Bright future seen for rotating wing aircraft at first meeting.American aviation, Washington, Nov. 15, 1938, v. 2, no. 11,po 10.

Hubschrauber gestern, heute und morgen, von P. Karlson. Rundschaudeutscher technik, Berlin, Oct. 1938, v. 18, no. 41, p. 4-5.illus.

Autogiro and rotary winged aircraft. Hearings before the Com­mittee on military affairs, House of representatives, April26, 27, 1938. Washington, U. S. Govt. print. off., 1938.104 p. (75th Congress, 3rd session, H.R. 8143)

.otary-wing and disk-rotor aircraft ••• Report. Washington, u. S.Govt. print. off., 1938. 8 p. (75th Congress, 3rd session,Senate report 2081)

FLIGHT INSTRUCTION

~ow an autogiro flies, by Lauren D. Lyman. Youth's digest, Phila­delphia, Sep.-Oct. 1938, v. 2, no. 3--4, p. 74-76.

Les Enseignements du vol naturel et leurs applications aux machinesvolar-tes capables de stationner en l'air, par E. Oehmichenet Jo Tilho. C. R. Acad. sci., Paris, Mar. 9, 1938, v. 206,no. 19, p. 1355-57. illus.

PERFORMANCE AND TESTING

~requency and vibration problems of rotors, by R. H. Prewitt andR. A. Wagner. Journal of the Aeronautical sciences, NewYork, Aug. 1940, v. 7, no. 10, p. 444-50. diagrso

5

PERFORMANCE AND TESTING

Notes on autogiro rotor longitudinal stability, by AlexanderKlemin, Victor R. Haugen and Samuel B. Sherwin. Journal ofthe Aeronautical sciences, New York, Jan. 1940, v. 7, no. 3,po 1210 (Second amlual rotating wing aircraft meeting)

Photographic observations in flight of the stalling of rotor wings,by F. J. Bailey. Journal of the Aeronautical sciences, NewYork, Jano 1940, v. 7, no. 3, p. 121. (Second annual rotat­ing wing aircraft meeting)

Roof landing problem, by John M. Miller. Journal of the Aeronau­tical sciences, New Yorlc, Jan. 1940, v. 7, no. 3, p. 120.(Second annual rotating wing aircraft meeting)

Rotor controls, by Harris S. Campbell. Journal of the Aeronau­tical sciences, New York, Jan. 1940, v. 7, no. 3, p. 121.(Second annual rotating wing aircraft meeting)

Stress analysis of rotor blades, by Hugh Mulvey. Journal of theAeronautical sciences, New York, Jan. 1940, v. 7, no. 3,po 1210 (Second annual rotating wing aircraft meeting)

Tr'~atment of performance losses on rotors with centre-cut-outs,by Paul Ho Stanley. Journal of the Aeronautical sciences,New York, Jano 1940, v. 7, no. 3, p. 121. (Second annualrotating wing aircraft meeting)

Autogiros for convoys, by A. Goodall. Aeroplane, London, Oct. 5,1939, Vo 57, noo 1480, p. 414.

Le Prob1eme du vol au point fixe; de l'insecte a l'helicostat, parLo Hou11evigueo La Science et la vie, Paris, Oct. 1939, v.56, noo 268, po 298-304. diagrs., tables.

Direct take-·off makes good, by C. M. Poulsen. Flight, London,June 8, 1939, v. 35, no. 1489, p. 580-82. il1us.

erodynamik des drehflUgels mit blattwinke1rUcksteuerung, vonAo PflUger 0 Luftfahrtforschung, Mlinchen, June 1939, v. 16,noo 7, po 355-61. diagrs., tables.

:he Autogiro .- an observation post, by Louis B. Ely. Fieldartillery journal, Washington, May-June 1939, v. 29, p. 202­140 il1us 0

~lattern von drehflUge1n im standlauf, von K. Hohenemser. Inge­nieur archiv, Berlin, Apr. 1939, v. 10, no. 2, p. 133-42.il1uso

rinciples of rotary aircraft, by Alexander Klemin. Journal ofthe Franklin institute, Philadelphia, Febo, Mar. 1939, v. 227,no o 2, 3, po 219-49; 355-97. i11uso

6

AUTOGIROS

Observations in flight of the region of stalled flow over theblades of an autogiro, by F. J. Bailey and F. B. Gustafson.Washington, 19390 12 p. illus. (N.A.C.A. Technical notesnoo 741)

Twenty years of pioneering in rotary aircraft. Philadelphia,Pennsylvania ai.rcraft syndicate, 1939. 15 p. diagrs., illus.,tables 0

Aeroplanes a l!essaio Les Ailes, Paris, Nov. 17, 1938, v. 18,po 90

straight up, by James G. Ray. Saturday evening post, Philadelphia,Nov. 5, 1938, v. 211, no. 19, p. 14-15, 39, 42.

Possibilities of the jump off autogiro, by R. H. Prewitt. Journalof the Aeronautical sciences, New York, Nov. 1938, v. 6, no.1, po 10-140 illus., tables.

How an autogiro flies, by Lauren D. Lyman. Youth's digest, Phila­delphia, Sepo-Octo 1938, v. 2,.no. 3-4, p. 74-76. illus.

La - ~s t opinions and experiences is direct aerodynamic lift, by, .Ao Tripodio Aircraft engineering, London, Sep. 1938, v. 10,noo 115, po 2900 (Also L'Aerotecnica, Roma, Apr. 1938, v.18, noo 4, po 497)

Leistungsvergleich eines tragschraubers mit einem drachenflugzeug,von E. Dalando Zeitschrift des V.D.I., Berlin, July 1938,Vo 82, noo 27, po 811. illus., tables.

':'he Stressing of rotor blades, by J. Morris and W. Tye. Aircraftengineering, London, June 1938, v. 10, no. 112, p. 177-79.

Autogiros in the Uo S. army. Flight, London, May 26, 1938, v. 33,no o 1535, po 5340

And now the autogiro, by Edward G. Shannon. Military digest,Washington, May 1938, v. 3, no. 1, p. 31-37. illus.

Performance and control of rotary wing aircraft, by E. B. Wilford.Journal of the Aeronautical sciences, New York, May 1938,Vo 5, noo 7, po 278-800

~ur les possibilites du vol vertical a faible vitesse en aeronau­tique, par Svetopolk Pivko. L'Aeronautique, Paris, Mar. '1938, Vo 17, no. 183, p. 33-35. tables.

_erformance of rotating wing aircraft, by K. Hohenemser. Washing­ton, 19380 28 ro illus., tables. (N.A.C.A. Technical memo­randums noo 871 (From Ingenieur archiv, Berlin, Dec. 1937,Vo 8, po 433-49

PEEFORMANCE AND TESTING

A Rough estimate of the twist of autogiro blades in flight, by D.Mo Hirst. London, H. M. Stat. off., 1938. 8 p. diagrs.,illus. (AoRoCo R. & M. no. 1802)

Static longitudinal stability and longitudinal control of autogirorotors, by M. Schrenko Washington, 1938. 17 p. tables.(N.A.C.A. Technical memorandums no. 879) (From Luftfahrt­forschung, Mlinchen, June 6, 1938, v. 15, no. 6, p. 283-89.illus.)

A Study of the torque equilibrium of an autogiro rotor, by F. JoBailey, Jro Washington, U. S. Govt. print. off.~ 1938.10 p. illuso, tables. (N.AoCoA. Report no. 623)

And now the autogiro, by Lesley J. McNair.' Field artilleryjournal, Washington, Jano-Feb. 1937, v. 27, no. 1, p. 5-17.diagrs., illuso

Static thrust of lifting airscrew, by M. Knight and R. A. Hafner.Washington, 1937. 41 p. diagrs., illus., tables. (N.A.C.AoTechnical notes no. 626)

Wind-tunnel tests of 10-foot-diamete~ autogiro rotors, by CarltonBioletti and John B. Wheatley. Washington, U. S. Govt. print 0off., 1937. 14 p. tables. (N.A.C.A. Report no. 552)

THEORY

La Formule de l'autogiro et ses progres, par P. H. Monaud. LesAiles, Paris, Mar. 1940, v. 20, p. 4. illus.

Que peut-on attendre de l'autogire dans ses applications civileset militaires? par Georges Favier. La Science et la vie,Paris, Mar. 1940, v. 57, no. 273, p. 179-86. diagrs., illus.,table.

Gyroplanes and combination types, by E. B. Wilford. Journal ofthe Aeronautical sciences, New York, Jan. 1940, v. 7, no. 3,p. 121. (Second annual rotating wing aircraft meeting)

1e Probleme du vol au point fixe; de l'insecte a l'helicostat,par 1. Houllevigue. La Science et la vie, Paris, Oct. 1939,v. 56, no. 268, p. 298-3040 diagrs., tables.

Das Trag - und hubschrauberproblem, von H. Focke. (In Jahrbuchder deutschen luftfahrtforschung, MUnchen, 1939; p. 203-07.illus., tables)

,

Possibilities of the jump-off autogiro, by R. H. Prewitt. Journalof the Aeronautical sciences, New York, Nov. 1938, v. 6, no.1, p. 10-14. illus., tables.

8

AUTOGIROS

in flight, by D.8 p. il1ns.

BELL

TYPES

nalysis and model tests of autogiro jump take--off, by John B.Wheatley and Carlton Biolletti. Washington, 1936. 18 p.diagrso, tables. (N.Aoe.Ao Technical notes no. 582)

CIERVA

A Rough estimate of the twist of autogiro bladesMo Hirsto London, Ho M. Stat. off., 1937.(AoRoCo R. & Mo no. 1802)

utogiros in the U. S. army 0 Flight, London, May 26, 1938, v. 33,noo 1535, po 5340

Aircraft efficiencies, by N. A. V. Piercy. Engineer, London, Mar.25, Apro 1, 1938, v. 165, po 346-·47; 374-'76. il1us. (Al~Q.Engineering, London, Maro 25, 1938, v. 145, no. 3767, p. 339­42)

rinciples of rotary aircraft, by Alexander K1emino Journal ofthe Franklin institute, Philadelphia, Febo, Mar. 1939, Vo 227,no 0 2, 3, po 219--46; 354-970 diagrs 0, illus 0

Nuove vedute ed esperienze sul1a sostentazione aerodinanicadiretta, di A. R. Tripodio LIAerotecnica, Roma, Apr. 1938,Vo 18, noo 4, po 4970

Sur 1es possibi1it~s du vol vertical h faib1e vitesse en a~ronau­tique, par Svetopolk Pivkoo LIAeronautique, Paris, Mar.1938, v. 17, no. 183, po 33-350 tab1eso

A Study of the torque equilibrium of an autogiro, by F. J. Bailey,Jro Washington, U. S. Govto print. offo, 1938. 10 p. illus.(NoAoCoAa Report noo 623)

Some aerodynamic problems in tne design of the convertible aero-·plane, by Gerard Po Herrtc~o Journal of the Aeronauticalsciences, New York, Octo 1938, Vo 5, no. 12, po 494-970il1uso

Beitrag zur aerodynamik der drehf1lige1flugzeuge, von G. Sissingh.Luftffu~rtforschung, Mlinchen, June 6, 1938, v. 15, no. 6,po 290-·3020 il1us"

Fragen des drehflilgels, von T. Mohring 0 Deutsche luftwacht, aus­gabe LUftwissen, Berlli1, Aug. 1936, Jan. 1937, v. 3, 4, no.8,1, po 207···14; 12·210 diagrso

9

TYPES

Neuer Cierva tragschrauber. Interavia, Geneva, Nov. 19, 1938,noo 595, p. 5.

Latest jumping autogiro. Flight, London, Nov. 3, 1938, v. 34, no.1558, po 382. (Also Aeroplan~, London, Nov. 2, 1938, v. 55,no. 1432, p. 537;---

The New autogiroo Aeroplane, London, July 6, 1938, v. 55, no.1415, po 340

HAFNER

Principles of rotary aircraft, by Alexander Klemin. Journal ofthe Franklin institute, Philadelphia, Feb., Mar. 1939, v. 227,no. 2, 3, p. 219-46; 254-97. illus.

Der Hafner tragschrauber, von M. Schrenk. Zeitschrift des V.D.I.,Berlin, July 1938, v. 82, no. 30, p. 890-91. illus.

Gyroplane and autogiro, by J. A. J. Bennett. Flight, London, Oct.28, 1937, v. 32, no. 1505, p. 25-26. illus.

On rotary aspirations, by R_. Hafner. Flig~t, London, Oct. 21,1937, v. 53, no. 1504, p. 407-08. (Also Aeroplane_, London,Oct. 20, 1937, v. 32, p. 478-80. illus.)

KELLET

L'Autogire, automobile posta1e de Philadelphie. L'Aeronautique,Paris, Jano 1940, v. 221, no. 248, p. 16.

The Autogiro machineo Aeroplane, London, Mar. 29, 1939, v. 56,noo 1453, p. 410.

Observations in flight of the region of stalled flow over theblades of an autogiro, by F. J. Bailey, Jr. and F. B.Gustafsono Washington, 1939. 12 p. diagrs., tables.(N.AoCoAo Technical notes no. 741)

The Missing link in aviation, by John H. Miller. Popular mechanics,Chicago, Sep. 1938, v. 70, no. 3, p. 346-51, 134a-135a.illus 0

Autogiros in the U. S. army. Flight, London, May 26, 1938, v. 33,no. 1535, p. 534.

PITCAIRN

Pitcairn model PA-36 direct control autogiro, by D. Rose. Aerodigest, New York, Sep. 1940, v. 37, no. 3, p. 104, 115.

10

WILFORD

SAUTEUR

Flig~t, London, Mar. 14, 1940, v. 37, no. 1629,illus., tables.

Army cooperation.p. 234m-2340.

Autogiro has high service factor. Machine design, Cleveland, Ohio,Feb. 1940, v. 12, no. 2, p. 46, 86.

AUTOGIROS

Army experiences with rotary aircraft, by E. S. Nichols. Journalof the Aeronautical sciences, New York, Jan. 1940, v. 7, no.3, p. 120. (Second annual rotating wing aircraft meeting)

Autogiro mail service. Flight, London, Apr. 25, 1940, v. 37, no.1635, p. 375.

USES

Gyroplanes and combination types, by E. B. \'Jilford • Journal ofthe Aeronautical sciences, New York, Jan. 1940, v. 7, no. 3,p. 121. (Second annual rotating wing aircraft meeting)

Pitcairn whirl wing, by A. E. Larsen. Aviation, New York, Sep.1940, v. 39, no. 9, p. 46-47, 131. illus.

Principles of rotary aircraft, by Alexander Klemin. Journal ofthe Franklin institute, Philadelphia, Feb., Mar., 1939, v.227, no. 2, 3, p. 219-46; 357-97. illus.

Del' Sport und reiseflugzeugbau des auslands, von C. Esche. Zeit­schrift des V.D.I., Berlin, Aug. 1939, v. 83, no. 33, p. 958.illus.

Performance and control of rotary wing aircraft, by E. B. Wilford.Journal of the Ae~onautical sciences, New York, May 1938,v. 5, no. 7, p. 278-80. tables.

Que peut-on attendre de l'autogire dans ses applications civileset militaires? par Georges Favier. La Science et la vie,Paris, Mar. 1940, v. 57, no. 273, p. 179-86. illus.

L' A:"l togiro l1Sauteur" realise l' envoI vertical. Les Ailes, Paris,July 30, 1936, v. 16, no. 789, p. 9. illus.

L'Aviation de cooperation terrestre; avions et autogiros, organesde liaison et d'observation, par R. Maurer. La Science etla vie, Paris, Mar. 1940, v. 57, no. 273, p. 166-78. illus.,table.

11

USES

L'Autogire, automobile postale de Philadelphie. L'Aeronautique,Paris, Jan. 1940, v. 221, no. 248, p. 16.

Ships can carry autogiros to spot submarines. Scientific american,New York, Dec. 1939, v. 161, no. 6, p. 339. illus.

The Autogiro mail service. Aeroplane, London, Nov. 9, 1939, v.57, no. 1485, p. 420.

Autogiros for convoys, by A. Goodall. Aeroplane, London, Oct. 5,1939, v. 57, no. 1480, p. 414.

Giro delivers mail on the roof. Scientific american, New York,Oct. 1939, v. 161, no. 4, p. 222-23.

Autogiro mail line opens at Philadelphia. Science news letter,Washington, July 22, 1939, v. 36, no. 4, p. 60. illus.

Giro's machine shuttle debut spurs hope of use as taxi. News week,Dayton, Ohio, July 17, 1939, v. 14, p. 28. illus.

The Autogiro mail. Aeroplane, London, Mar. 29, 1939, v. 56, no.1453, p. 410. illus.

Short haul in Philadelphia. Aeroplane, London, Dec. 21, 1938, v.55, no. 1439, p. 822.

Autogiro air mail; post office calls for bids on experimentalshuttle service for Philadelphia. Business week, New York,Deco 10, 1938, p. 18.

Autogiros in the U. S. army. Flight, London, May 26, 1938, v. 33,no. 1535, p. 534.

GENERAL

Eastern nir lines denied permanent certificate for autogiro opera­tions at Philadelphia. Civil aeronautics journal, Washington,Aug. 15, 1940, v. 1, p. 401.

L'Aviation de cooperation terrestre; avions et autogiros, org~~esde liaison at d'observation, par R. Maurer. La Science etla vie, Paris, Mar. 1940, v. 57, no. 273, p. 166-78. illus.

Rotary-wing aircraft conference - summary of the papers presentedbefore the Second annual rotating wing aircraft meeting, byAlexander Klemin. Aircraft engineering, London, Mar. 1940,v. 12, no. 133, p. 76-79.

Autogiro has hi&h service factor. Machine design, Cleveland, Ohio,Feba 1940, v. 12, no. 2, p. 46, 86.

12

AUTOGIROS

Economic significance to passenger traffic of central city lllild­ing, by C. E. McCollum. Journal of the Aeronautical sciences,New York, Jan. 1940, v. 7, nOQ 3, p. 120. (Second annualrotating wing aircraft meeting)

Rotary wing aircraft, by J. A. J. Bennett. Aircraft engineering,London, J~~. 1940, v. 12, p. 7-G. illus., tables.

Rotor craft drive systems, by John M. Shuckers. Journal of theAeronautical sciences, New York, Jan. 1940, v. 7, no. 3,p. 120. (Second annual rotating wing aircraft meeting)

Ships can carry autogiros to spot submarines. Scientific american,N~w York, Dec. 1939, v. 161, no. 6, p. 339. illus.

The Stressing of rotating blade aerofoils, by J. B. B. Owen. En­gineering, London, Nov. 3, 1939, v. 148, p. 511-13. illus.,tables.

Der Sport und reiseflugzeugbau des auslands, von C. Esche. Zeit­schrift des V.D.I., Berlin, Aug. 1939, v. 83, no. 33, p. 958.illus.

Giro's machine shuttle debut spurs hope of use as taxi. News week,Dayton, Ohio, july 17, 1939, v. 14, p. 28.

From Fairey gimlt to jumping giro, by C. G. Grey. Aeroplane,London, July 12, 1939, v. 57, no. 1468, p. 55-56. illus.

Traffic violators beware. AViation, New York, Feb. 1939, v. 38,no. 2, p. 24-25, 27. illus.

Rotary aircraft. Aero digest, New York, Dec. 1938, v. 33, no. 6,p. 46, 78. illus. (Also U. S. Air services, Washington,Dec. 1938, v. 23, no. 12, p. 30)

Rotating wing aircraft meeting. Journal of the Aeronauticalsciences, New York, Dec. 1938, v. 6, no. 2, p. 73-74.

Bright future seen for rotating wing aircraft at first meeting.Franklin institute, Philadelphia. American aViation, Wash­ington, Nov. 15, 1938, v. 2, no. 12, p. 10.

Straight up, by James G. Ray. Saturday evening post, Philadelphia,Nov. 5, 1938, v. 211, no. 19, p. 14-15, 39, 42. illus.

Possibilities of the jump-off autogiro, by R. H. Prewitt. Journalof the Aeronautical sciences, New York, Nov. 1938, v. 6,no. 1, p. 10-14. illus., tables.

The Missing link in aviation, by John H. Miller. Popular mechllilics,Chicago, Sep. 1938, v. 70, p. 346-51, 134a-135a. illus.

13

GENERAL

Military digest,illuso

And now the autogiro, by Edward G. Shannon.Washington, May 1938, Vo 3, p. 31-37.

La Premiere manoeuvre d'abandon et de remontee aboI'd d'un auto­gire en vol, par E. Denois. Re~~e de l'armee de l'air, Paris,Aug 0 1938, v. 10, no. 109, ~. 900-04. illus.

The 'Giro is a healthy lad, by Lee S. Thomas. Southern flight,Atlanta, Gao, July 1938, v. 10, no. 1, p. 6-7. illuso

Ausf~hrbares start- unu landedeck fur tragschrauber. Deutscheluftwacht, ausgabe Luftwehr, Berlin, Nov. 1937, Vo 4, noo 11,p. 4710

~he Private owner's salvation? by R. A. C. Brie. Flight, London,Mar. 24, 1938, v. 33, no. 1526, p. 292-93.

And now the autogiro, by Lesley J o McNair. Field artilleryjournal, Washington, J&~.~Feb. 1937, v. 27, no. 1, po 15-170diagrso, illus.

Pit.cairn speaks on autogiros before House committeeo Automotiveindustries, Philadelphia, May 7, 1938, v. 78, noo 19, p. 616y6480

Wi tnesses at Dorsey hearing unanimous in praise of giros 0 Ameri·­can aviation, Washington, May 15, 1938, v. 1, noo 24, po 70

Place in air predicted for tlwindmili ll plane. Science news letter,Washington, June 4, 1938, v. 33, no. 23, p. 360- ·61. illus.

Hearings on autogiro subsidy (Kellet autogiro corporation). .Mili-·tary digest, Washington, June 1938, v. 3, no. 6, po 8-9.

Les Autogires, par J. Jarlaud. Revue aeronautique, Paris, Octo­Nov. 1937, v. 27, noo 4, p. 8--90 diagrso, illuso

14

Section II

HELICOPTERS

DESIGN AND CONSTRUCTION

Sikorsky's helicopter, by Alexander Klemin. Scientific american,New York, Oct. 1940, v. 163, p. 189. illus.

Rotating wing aircraft exhibit desirable characteristics fornational defense, by Alexander Klemin. Scientific american,New York, Sep. 1940, v. 163, p. 138.

The Sikorsky helicopter. Aviation, New York, July 1940, v. 39,no. 7, p. 65, 122. illus.

Return to an old love, by H. W. Perry. Flight, London, June 27,1940, v. 37, no. 1646, p. 569--70. illus.

Details of Sikorsky helicopter. Aero digest, New York, June 1940,v. 36, no. 6, p. 56-57.

Vought Sikors~f helicopter VS-300. Interavia, Geneva, May 29,1940, no. 712, p. 17-18.

Versuche mit hubschraubern in Belgien, von N. Florine. Deutscheluftwacht, ausgabe Luftwissen, Berlin, Apr. 1940, v. 7, no.4, p. 104-12. illuso

Rotary wing aircraft, by J. A. J. Ber~ett. Aircraft engineering,London, Feb. 1940, v. 12, p. 40-44. diagrs., illus., tables.

L'Helicoptere d'Asboth. L'Air, Paris, Jan. 20, 1940, v. 22,p. 10.

New parameter for lifting rotors, by A. M. Young. Journal of theAeronautical sciences, New York, Jan. 1940, v. 7, no 3,p. 121. (Second annual rotating wing aircraft meetilg)

Asboth helicopter. Scientific american, New York, Dec. 1939, v.161, no. 12, p. 348.

The Stressing of rotating blade aerofoils, by J. B. B. Owen. En­gineering, London, Nov. 3, 1939, v. 148, p. 511-13. illuso,tables.

Real helicopter progress, by C. M. Poulsen. Flight, London, Aug.24, 1939, v. 36, no. 1600, p. 174-76.

The Helicopter canard. Flight, London, Aug. 10, 1939, v. 36, no.1598, po 124.

About helicopters. Aeroplane, London, Aug. 9, 1939, v. 57, no.1472, p. 176, 191.

•

15

DESIGN AND CONSTRUCTION

Aerodynamik des drehflligels mit blattwinkelrlicksteuerung, von AoPfluger. Luftfahrtforschung, MUnchen, July 20, 1939, v. 16,no. 7, po 355-610 diagrso

Florine helicoptero Aeroplane, London, July 12, 1939, v. 52, noo1468, po 43-440

Ein neuer tragschrauber. Rundschau deutscher technik, Berli.n,Jano 5, 1939, v. 19, noo 1, p. 30 i11uso

Dynamic stability of a helicopter with hin8ed rotor blades, by KoHohenemsero Washington, 19390 16 po i1lus. (NoAoCoA,Technical memorandums noo 906) (Fro~ Ingenieur archiv,Berlin, v. 9, noo 6, po 419-28)

The Helicopter Focke-Wulf, by Paul Plecan and Hammer Roger. Airtrails, New York, Novo 1938, Vo 11, noo 2, po 68·-720 illus.(Also LfAerotecnica, Roma, Augo-Sep. 1938, v. 18, noo 8---9,p. 1040-42)

France builds an Asboth helicoptero Aeroplane, London, Sepo 7,1938, Vo 55, no. 1424, ~o 2880

Focke helicopter, by Alexander Klemin. Scientific american, NewYork, Sepo 1938, v. 159, no. 3, p. 143-44.

LtHelicoptere Focke FoVlo 610 LfAerona.utique, Paris, Aug. 1938,Vo 20, no. 231, po 172-760 i1lus. CAlso Intava world,London, July 1938, v. 1, no. 1, po 4)

Die Schwingungsbeanspruchung der rotorblatter von tragschrauben,von Ao PflUger. Ingenieur archiv, Berlin, Aug. 1938, v. 9,no. 4, p. 244--58. illus 0

Notes techniques 0 Les Ailes, Paris, July 14, 1938, v. 18, po 70i1luso

The Focke helicopter, by H. Fockeo Journal of the R.AoSo, London,July 1938, v 0 42, po 577- -900 (p.]...s.o Aeroplane, London, May25, 1938, Vo 54, no. 1409, po 639~43)

Helicopteres et gyroplanes, par Po Zenso Industrie des voiesferrees et des transports automobiles, Paris, July 1938,v. 32, no. 379, po 186-920 i1luso

LtAppareil allemand du professeur Fockeo Modes de propulsion deshe1icopteres, par M. Lame 0 Science aerienne, Paris, May­June 1938, v. 7, po 97-1200 illus., tables 0

Stressing of rotor bla~es, by J. Morris and W. Tye. Aircraft en­gineering, London, June 1938, v. 10, no. 112, po 177--790illus.

Deutsche lUftwacht, ausgabe5, no. 2, p. 33--390 diagr 0'

16

HELICOPTERS

Flight, London, Aug.illus., tableso

Les Enseignements du vol naturel et leurs applications aux rna·chines volantes capables de stationner en llair, par E.Oehmichen et J. Tilho. C. R. Acad. sci., Paris, May 9, 1938,v. 206, no. 19, p. 1355-57.

Neue wege der f1ugtechnik, von H. Focke. Deutsches museum abhand­lttngen, Berlin, May 1938, v. 10, no. 6, p. 145-66. i1luso,table.

Nuove vedute ed esperienze sulla sostentazione aerodinamica di­retta, di A. Tripodi. L'Aerotecnica, Roma, Apr. 1938, v. 18,no. 4, p. 4970

Eigenarten und rnoglichkeiten des hubschraubers. Flugsport, Frankfurt AIM, Apr. 1937, v. 29, no. 4, p. 99-104. illuso

DEVELOPMENT

Les Six qualites de llhelicoptere, par H. Focke. Les Ailes, ParisApr. 28, 1938, v. 18, no. 880, p. 7.

Helicopter, by A. Izakson and A. Chere~ukhin. (In Technical en­cyclopedia, Moscow, 1938, v. 5, p. 270-73. illuso)

L'Appareil allemand du professeur Focke. Modes de propulsion deshe1icopteres, par ].~. Lame. Science aerienne, Paris, May-June1938, v. 7, no. 3, p. 97-120. diagrs., tables.

The Helicopters are coming. Aeroplane, London, May 18, 1938, v o54, no. 1408, p. 611-12. i11us.

De Gyroplane van Louis Breguet. De voordeelen van de helicoptereoV1iegwereld, Haarlern, 1936-1937, v. 2, no. 46, p. 7410il1us.

Real he1ocopter progress, by C. M. Poulsen.24, 1939, v. 36, no. 1600, p. 174-76.

Helicopter progress. Flight, London, Apr. 21, 1938, v. 33,no. 1530, po 380-83. illus.

Development of the Focke helicopter, by Heinrich Fockeo Trans~

actions of the AoSoM.E., New York, Apr. 1939, Vo 61, no. 4,p. 177-89. illuso

Del' Focke hUbschrauber, von H. Focke.Luftwissen, Berlin, Feb. 1938, v.illus.

Helicopter, by A. Cheremukhin. (In Large soviet encyclopedia,Moscow, 1938, v. 15, p. 71-74. illuso)

17

DEVELOPMENT

L'Appareil de tourisme de l'avenir naitra du mariage de l'avion.et de l'helicoptere. Les Ailes, Paris, Mar. 17, 1938, v. 18,no. 874, p. 7-8.

DeI' Focke hubschrauber, von H. Focke. Deutsche luftwacht, ausgabeLuftwissen, Berlin, Feb. 1938, v. 5, no. 2, p. 33-39. illus;

Technical progress in 1937, by T. James. Aeroplane, London, Jan~

5, 1938, v. 54, no. 1389, p. 16-18.

Neue wege der flugtechnik, von li. Focke. Berlin, V.D.I., 1938.22 p. diagrs., illus., tables.

Eieenarten und moglichkei ten des hubschraubers. Flugsport, Frank-·furt A/M, Feb. 17, 1937, v. 29, no. 4, p. 99-104. diagrs.,illus.

PERFORMANCE AND TESTING

Helicopter flown successfully. Popular science, New York, Sep.1940, v. 137, no. 3,. p. 50. illus.

Frequency and vibration problems of rotors, by R. H. Prewitt andR. A. Wagner. Journal of the Aeronautical sciences, NewYork, Aug. 1940, v. 7, no. 10, p. 444-50. diagrs.

Igor Sikorsky demonstrates his helicopter. U. S. Air services,Washington, July 1940, v. 25, no. 7, p. 15.

Hubschraube versuche in Belgien, von N. Florine. Deutsche luft­wacht, ausgabe Luftwissen, Berlin, Apr. 1940, v. 7, no. 4,p. 104--12. illus.

Rotary-wing aircraft conference, by Alexander Klemin. Aircraftengineering, London, Mar. 1940, v. 12, no. 133, p. 76-78, 79.illus.

Commercial and military uses of rotating wing aircraft, by I.Sikorsky. Journal of the Aeronautical sciences, New York,Jan. 1940, v. 7, no. 3, p. 121. (Second annual rotating wingaircraft meeting)

Stress analysis of rotor blades, by Hugh Hulvey. Journal of theAeronautical sciences, New York, Jan. 1940, v. 7, no. 3,p. 121. (Second aPJlual rotating wing aircraft meeting)

Fesselschrauber. Flugsport, Frankfurt A/M, Dec. 20, 1939, v. 31,no. 26, p. 599-600. illus.

Stressing of rotating-blade aerofoils, by J. B. B. Owen. Engi­neering, London, Nov. 3, 1939, v. 148, no. 3851, p. 511-13.illus.

18

Analytical comparison of helicopter and aeroplane in level flight,by M. Knight. Journal of the Aeronautical sciences, NewYork, Sep. 1938, v. 5, no. 11, po 431-35.

Principles of rotary aircraft, by Alexander Klemin. Journal ofthe Franklin institute, Philadelphia, Feb., Mar. 1939, Vo 227)no. 2, 3, p. 219-49; 354-97. illus.

Flight, London, Aug,diagrs., illuso

HELICOPTERS

Twenty years of pioneering in rotary aircraft. Philadelphia,Pennsylvania aircraft syndicate, 1939. 15 p. diagrso,illus., tables.

The Flights of the Asboth helicopter. Les Ailes, Paris, Nov. 17,1938, v. 18, p. 4.

Going up. Aeroplane, London, Feb. 15, 1939, v. 56, p. 195. illuso(Also Les Ailes, Paris, Feb. 9, 1939, v. 19, p. 4)

Speed with safety. Flight, London, Jan. 5, 1939, v. 35, no. 1567,p. 3.

Tragkraft der hubschraube. Deutsche luftwacht, ausgabe Luftwissen~

Berlin, Apr. 1939, v. 6, no. 4, p. 146.

Waagerechtflug des hubschraubers, von M. Knight. Deutsche luft·wacht, ausgabe Luftwissen, Berlin, Apr. 1939, v. 6, noo 4,po 146.

Aerodynamics of the rotor of a helicopter during flight in acurve, by M. Mil. Teknika vozdushnovo flota, Moscow, Jano1939, v. 13, no. 1, p. 56-82. diagrs., illus.

Helicopter triumphant; Franklin institute meeting devoted exclu­sively to rotary aircraft. Scientific american, New York,Jan. 1939, v. 160, no. 1, p. 30.

Helicopters. Scientific american, New York, Sep. 1938, v. 159,no. 3, p. 143-44. illus.

Les Idees dtEtienne Oehmichen sur la stabilite des aerodynes, parG. C. Richard. Les Ailes, Paris, Aug. 11, 1938, v. 18, noo895, p. 7.

Real helicopter progress, by C. M. Poulsen.24, 1939, v. 36, no. 1600, p. 174-76.

Die Schwingungsbeanspruchung der rotorblatter von tragschraubern,von A. PflUger. Ingenieur archiv, Berlin, Aug. 1938, v. 9,no. 4, p. 244-·58. illus.,

Leistungsvergleich eines tragschraubers mit einem drachenflugzeugoZeitschrift des V.D.I., Berlin, July 2, 1938, v. 82, no. 27,p. 811.

19

PERFORMANCE AND TESTING

Helicopteres et gyroplanes, par P. Zens. Industri.es des voiesferrees et des transports automobiles, Paris, July 1938,v. 32, no. 379, p. 186-92. diagrs., illus.

230 kilometres en helicoptere. Les Ailes, Paris, June 30, 1938,v. 18, no. 889, p. 6.

Les Enseignements du vol naturel et leurs applications aux ma­chines volantes capables de stationner en l'air, par E.Oehmichen et J. Tilho. Le Genie civil, Paris, June 18, 1938,v. 12, p. 523-24. (Also C. R. Acad. sci., Paris, May 9,1938, v. 204, p. 1355-59)

L'Appareil allemand du professeur Focke. Modes de propulsion deshelicopteres, par M. Lame. Science aerienne, Paris, May­June 1938, v. 7, no. 3, p. 97-120. diagrs., illus., . tables.

The Stressing of rotor blades, by J. Morris and W. lye. Aircraftengineering, London, June 1938, v. 10, no. 112, p. 177-79.illus.

LIHelicoptere vaut l'avion pour la montee et la vitesse, par H.Focke. Les Ailes, Paris, May 12,19.38, v. 18, no. 882, p. 8.

Performance and control of rotary-wing aircraft, by E. BurkeWilford. Journal of the Aeronautical sciences, New York,May 1938, v. 5, no. 7, p. 278-80. diagrs., tables.

1 1Helicoptere machine volante pratique, par M. Lame. La Nature,Paris, Apr. 15, 1938, v. 66, no. 3023, p. 233-36•. illus.

Del' Erste hallenflug del' welt, von Paul Karlson. Deutsche luft­wacht, ausgabe Luftwissen, Berlin, Apr. 1938, v. 5, no. 4,p. 110-12. illus.

Nuove vedute ed esperienze sulla sostentazione aerodinamica di­retta, di R. Tripodi. Aerotecnica, Roma, Apr. 1938, v. 18,no. 4, p. 497.

Anna Reitsch, celebre virtuose de l'helicoptere, a vole a l'inte­rieur du Grand Palais de Berlin. r.'~cho des ailes, Bruxelles,Feb. 24, 1938, v. 8, no. 8, p. 92. illus. (Also Les Ailes,Paris, Nov. 11, 1937, v. 17, p. 7)

Les Conceptions des helicopteres et leur realisation actuelle.LfAero, Paris, Jan. 28, 1938, no. 1548, p. 15.

A Propos des recents records de l'helicoptere allemand Focke, parM. Lame. Les Ailes, Paris, Jan. 27, 1938, v. 18, no. 867,p. 7.

La Technique du vol en helicoptere. L'Aerophile, Paris, Jan.1938, v. 46, no. 1, p. 9. illus.

(In Jahrbuch derp. 203-07.

20

HELICOPTERS

Performance of rotating wing aircraft, by K. Hohenemser. Wash­ington, 1938. 28 p. illus., tables. (N.A.C.A. Technicalmemorandums no. 871) (From Ingenieur archiv, Berlin, Dec.1937, v. 8, no. 6, p. 433-49)

La Commande de l'helicoptere F.W. 61. Les Ailes, Paris, Dec. 23,193~~. 17, p. 5. illus.

Flug rundschau. Flugsport, Frankfurt AIM, Nov. 10, 1937, v. 29,noo 23, po 644-45.

THEORY

Helicopter theory; the fundamental problems which govern thisform of flight, by Theodore von Karman. Aircraft engineering,London, Sepo 1940, v. 12, no. 139, p. 271-76. diagrs.

Le Probleme du vol au point fixe; de l'insecte a l'helicostat.Science et la vie, Paris, Oct. 1939, v. 56, p. 298-304.illuso

Tragkraft der hubschraube. Deutsche lUftwacht, ausgabe Luftwissen,Berlin, Apr. 1939, v. 6, no. 4, p. 146.

Principles of rotary aircraft, by Alexander Klemin. Journal ofthe Franklin institute, Philadelphia, Feb., Mar. 1939, v. 227,no. 2, 3, p. 219-49; 355-97. illus.

Aerodynamics of the rotor of a helicopter during flight in acurve, by M. Mil. Teknika vozdushnovo flota, Moscow, Jan.1939, v. 13, no. 1, p. 56-82. diagrs., illus.

Das Trag ~ und hUbschrauberproblem, von H. Focke.deutschen luftfahrtforschung, MUnchen, 1939.illus., tables)

Uber die dynamische stabilitat des hubschraubers mit angelenktenflugeln, von K. Hohenems.er. Ingenieur archiv, Berlin, Deco1938, v. 9, no. 6, p. 419-28. illus.

Analytical comparison of helicopter and aeroplane in level flight,by M. Y~ight. Journal of the Aeronautical sciences, New York,Sepo 1938, v. 5, no. 11, p. 431-35.

Die Schwingungsbeanspruchung der rotorblatter von tragschraubern,von A. Pfluger. Ingenieur archiv, Berlin, Aug. 1938, v. 9,no. 4, p. 244-58. diagrs., illus.

Les Enseignements du vol naturel et leurs applications aux ma­chines volantes capables de stationner en l'air, par E.Oehmichen 'et J. Tilho. C. R. Acad. sci., Paris, May 9, 1938,v. 204, no. 19, p. 1355-59.

21

BAUMHAUER

THEORY

Flight, London, Aug.illus., tables.

TYPES

ASBOTH

About helicopters. Aeroplane, London, Aug. 9, 1939, v. 57, noo1472, p. 176, 191.

BERLINER

The Helicopter canard. Flight, London, Aug. 10, 1939, v. 36, noo1598, p. 124.

Principles of rotary aircraft, by Alexander Klemin. Journal ofthe Franklin institute, Philadelphia, Mar. 1939, v. 227,p. 354-97. illus., tables.

L'Helicoptere d'Asboth. L'Air, Paris, Jan. 20, 1940, v. 22,p. 10.

Le Focke Wulf est-il vraiment un helicoptere? par O. D. Asboth.Les Ailes, Paris, July 15, 1937, v. 17, no. 839, p. 7-8.

Static thrust analysis of the lifting airscrew, by R. A. Hafnerand M. Knight. Washington, 1937. 60 p. diagrs., illuso,tables. (N.A.C.A. Technical notes no. 626)

Real helicopter progress, by C. M. Poulsen.24, 1939, v. 36, no. 1600, p. 174-76.

Probleme des hubschraubers, von H. G. Klissner. Luftfahrtforschung,MUnchen, Jan. 20, 1937, v. 14, no. 1, p. 1-13.

Asboth helicopter. Scientific american, New York, Dec. 1938,v. 161, no. 12, p. 348.

Les ~ls' de l'helicoptere Asboth. Les Ailes, Paris, Nov. 17,1938, v. 18, p. 4.

Principles of rotary aircraft, by Alexander Klemin. Journal ofthe Franklin institute, Philadelphia, Mar. 1939, v~ 227,p. 354-97. illus., tables.

France builds an Asboth helicopter. Aeroplane, London, Sep. 7,1938, v. 55, no. 1424, p. 288. illus.

Principles of rotary aircraft, by Alexander Klemin. Journal ofthe Franklin institute, Philadelphia, Mar. 1939, v. 227,p. 354-97. illus., tables.

FLORINE

D'ASCANIO

22

CIERVA

Rundschau deutscher technik, Berlin,no. 1, p. 3. il1us.

HELICOPTERS

BREGUET-DORAND

DE BOTHEZAT

FOCKE-WULF

Ein neuer tragschrauber.Jan. 5, 1939, v. 19,

Principles of rotary aircraft, by Alexander Klemin. Journal ofthe Franklin institute, Philadelphia, Mar. 1939, v. 227,p. 354-97. illus., tables.

Principles of rotary aircraft, by Alexander K1emin. Journal ofthe Fraru{lin institute, Philadelphia, Mar. 1939, v. 227,p. 354-97. il1us., tables.

Notes techniques. Les Ailes, Paris, July 14, 1938, v. 18, p. 7.

Eigenarten und moglichkeiten des hubschraubers. Flugsport, Fr~~­

furt AIM, Feb. 17, 1937, v. 29, no. 4, p. 99-104. diagrs.

De Gyroplane van Louis Breguet. De voordee1en van de helicoptere.V1iegwereld, Haar1em, 1936-1937, v. 2, no. 46, p. 741. i11us.

Das Trag - und hUbschrauberprob1em, von H. Focke. (In Jahrbuchdel" deu tschen luftfahrtforschung, Munchen, 1939. p. 203-·07)

Principles of rotary aircraft, by AlexffiLder K1emin. Journal ofthe Franklin institute, Philadelphia, Mar. 1939, v. 227,p. 354-97. il1us.,. tables.

Hubschraube versuche in Belgien, von N. Florine. Deutsche luft­wacht, ausgabe Luftwissen, Berlin, Apr. 1940, v. 7, no. 4,p. 104-12. illus., tables.

Florine helicopter. Aeroplane, London, July 12, 1939, v. 52, no.1468, p. 43-44.

Development of the Focke helicopter, by Heinrich Focke. Trans­actions of the A.S.M.E., New York, Api. 1939, v. 61, no. 4,p. 177-89. il1us.

23

TYPES

Principles of rotary aircraft, by Alexander Klemin. Journal ofthe Franklin institute, Philadelphia, Mar. 1939, v. 227,po 354-97. illus., tables.

Going upo Aeroplane, London, Feb. 15, 1939, v. 56, p. 195. (AlsoLes Ailes, Paris, Feb. 9, 1939, v. 19, p. 4)

Speed with safety. Flieht, London, Jan. 5, 1939, v. 35, no. 1567,po 30

Das Trag - und hubschrauberproblem, von H. Focke. (In Jahrbuchder deutschen luftfahrtforschung, MUnchen, 1939. p. 203-07.illus., tables)

The Helicopter Focke-Wulf, by Paul Plecan and Hammer Roger. Airtrails, New York, Nov. 1938, v. 11, no. 2, p. 68-72. illus.,table 0

Focke helicopter, by Alexander Klemin. Scientific american, NewYork, Sepo 1938, v. 159, no. 3, p. 143-44. (Also L'Aero-·tecnica, Roma, Augo-Sep. 1938, v. 18, no. 8-9, p. 1040-42)

LPFelicoptere Foc~e F.W. 61. L'A~ronautique, Paris, Aug. 1938,v. 20, noo 2ul, p. 172-76. lllus. (Also Intava world,London, July 1938, v. 1, no. 1, p. 4 and Interavia, Geneva,Feb. 5, 1938, no. 514, p. 7-8)

The Focke helicopter, by H. Focke. Journal of the R.A.S., London,JUly 1938, v. 42, no. 331, p. 577-90. illus. (Also Aero­plane, London, May 25, 1938, v. 54, no. 1409, p. 639-43 andDeutsche luftwacht, ausgabe Luftwissen, Berlin, Feb. 1938,v. 5, p. 33-39)

230 kilometres en helicoptere. Les Ailes, Paris, June 30, 1938,v. 18, no. 889, p. 6.

LIAppareil allemand du professeur Focke. Modes de propulsion deshelicopteres, par M. Lame. Science aerienne, Paris, May­June 1938, v. 7, no. 3, p. 97-120. diagrs., illus.

The Helicopters are coming. Aeroplane, London, May 18, 1938,v. 54, no. 1408, p. 611-12. illus.

Un Choix parmi dix solutions, par H. Focke. Les Ailes, Paris,May 5, 1938, v. 18, no. 881, p. 7.

Helicopter progress, by H. Focke. Flight, London, Apr. 21, 1938,v. 33, no. 1530, p. 380-83. illus.

A Propos des recents records de l'helicoptere allemand Focke, parM. Lameo Les Ailes, Paris, Jan. 27, 1938, v. 18, no. 867,po 70

24

HELICOPTERS

Technical progress in 1937. Aeroplane, London, Jan. 5, 1938,v. 54, no. 1389, p. 16-18.

Focke helicopter, by H. Focke. Washington, 1938. 14 p. illus.(N.A.C.A. Technical memorandums no. 858) (From Deutscheluftwacht, ausgabe'Luftwissen, Berlin, Feb. 1938, v. 5, no.2, p. 32-39)

Neue wege der flugtechnik, von H. Focke. Berlin, V.D.I., 1938.22 p. il1us., table.

La Commande de l'helicoptere F.W. 61. Les Ailes, Paris, Dec. 23,1937, v. 17, p. 5. illus.

Records de Hanna Reitsch sur l'helicoptere F.W. 61. Les Ailes,Paris, Nov. 11, 1937, v. 17, p. 70

Flug rundschau. Flugspor't, Frankfurt AIM, Nov. 10, 1937, v. 20,no. 23, p. 644-45.

Uelicoptere of autogiro. Vliegwereld, Haarlem, Aug. 19, 1937,v. 3, no. 29, p. 502. illus.

Le Focke-Wulf est-il vraiment un helicoptere? par O. D. Asboth.Les Ailes, Paris, July 15, 1937, v. 17, no. 839, p. 7-8.illus.

L'Helicoptere Focke-Wu1f. Les Ailes, Paris, July 8, 1937, v. 17,no. 838, p. 4.

HELLESEN-KAHN

Principles of rotary aircraft, by Alexander Klemin. Journal ofthe Franklin institute, Philadelphia, Mar. 1939, v. 227,p. 354-97. il1us.

KELLET

Helicopters. Scientific american, New York, Sep. 1938, v. 159,no. 3, p. 143-44. illus.

The Missing link in aviation, by John H. Miller. Popular mechanics,Chicago, Sep. 1938, v. 70, no. 3, po 346-51, l34a-l35a.il1us.

OEHMICHEN

Les Idees d'Etienne Oehmichen sur la stabilite des aerodynes, parG. C. Richard. Les Ailes, Paris, Aug. 11, 1938, v. 18, no.895, p. 7.

25

OEHMICHEN

Les Enseignements du vol naturel et leurs applications aux ma­chines volantes capables de stationner en l'air, par E.Oe~1ichen et J. Tilho. C. R. Acad. sci., Paris, May 9, 1938,v. 206, p. 1355-57. (Abstract Le Genic civil, Paris, June18, 1938, v. 12, p. 523-24)

PESCARA

Principles of rotary aircraft, by Alexander Klemin. Journal ofthe Franklin institute, Philadelphia, Mar. 1939, v. 227,p. 254-97. illus.

VOUGHT-SIKORSKY

Sikorsky's helicopter, by Alexander Klemin. Scientific american,New York, Oct. 1940, v. 163, p. 189. illus.

Helicopter flo~~1 successfully. Popular science, New York, Sep.1940, v. 137, no. 3, p. 50. illus.

D-j ails of the Sikorsky helicopter. Aviation, New York, July1940, v. 39, no. 7, p. 65, 122. illus. (Also Aero digest,New York, June 1940, v. 36, no. 6, p. 56-5~

Igor Sikors~J demonstrates his helicopter. U. S. Air services,Washington, July 1940, v. 25, no. 7, p. 15.

Vought Sikorsky helicopter VS-300. Interavia, Geneva, May 29,1940, no. 712, p. 17-18.

GENERAL

Rotating wing aircraft exhibit desirable characteristics fornational defense, by Alexander Klemin. Scientific american,New York, Sep. 1940, v. 163, p. 138.

Return to an old love, by H. W. Perry. Flig~t, London, June 27,1940, v. 37, p. 569-'70. illus.

1'Aviation de cooperation terrestre; avions et autogires organesde liaison et d'observation, par Rene Maurer. La Scienceet la vie, Paris, Mar. 1940, v. 57, no. 273, p. 166-78. ill~s.

Rotary-wing aircraft conference, by Alexander Klemin. Aircraftengineering, London, Mar. 1940, v. 12, no. 133, p. 76-78, 79.

Commercial and military uses of rotating wing craft, by I. Sikorsky.Journal of the Aeronautical sciences, New York, Jan. 1940,v. 7, no. 3, po 121. (Second annual rotating wing aircraftmeeting)

26

HELICOPTERS

Helicopter ferries. Science, New York, Dec. 9, 1939, v. 36,p. 372.

Going up. Aeroplane, London, Feb. 15, 1939, v. 56, no. 1447,p. 195. (Al~o Les Ailes, Paris, Feb. 9, 1939, v. 19, p. 4).

America "sold" on helicopters, by R. Hafner. Flight, London, Jan.5, 1939, v. 35, no. 1567, p. 20-23. diagrs., illus.

Helicopters. Scientific american, New York, Sep. 1938, v. 159,no. 3, p. 143-44. il1us.

The Helicopters are coming~ Aeropl~~e, London, May 18, 1938,v. 54, p. 611-12. il1us.

Les Enseignements du vol nature1 et leurs applications aux ma­chines vo1antes capab1es de stationner en l'air, par E.Oehmichen et J. Ti1ho. C. R. Acad. sci., Paris, May 9, 1938,v. 206, no. 19, p. 1355-57.

L'Helicoptere machine volante pratique, par M. Lame. La Nature,Paris, Apr. 15, 1938, no. 3023, p. 233-36. il1us. (AbstractRcience digest, London, Aug. 1938, v. 4, no. 2, p. 33-34)

L'Appareil de tourisme de l'avenir naltra du mariage de I t avionet de l'he1icoptere. Les Ailes, Paris, Mar. 17, 1938, v. 18,no. 874, p. 7-8. illus.

Indoor flight, by Ulrich Haussmann. The Sportsm~~ pilot, New York,Mar. 15, 1938, v. 19, no. 3, p. 26, 48. illus.

Helicopter hopes. Flte;ht, London, Mar. 3, 1938, .v. 33, no. 1523,po 197"

Anna Reitsch, celebre virtuose de Ithelicoptere, a vole a I t inte­rieur de Grand Palais de Berlin. L'~cho des ailes, Bruxelles,Feb. 24, 1938, v. 8, no. 8, p. 92. illus. (Also Les Ailes,Paris, Nov. 11, 1937, v. 17, p. 7) .

27

Section III

GYRO PLANES

Gyroplanes and combination types, by E. B. Wilford. Journal ofthe Aeronautical sciences, New York, Jan. 1940, v. 7, no. 3,p. 1210 (Second annual rotating wing aircraft meeting)

Rotary wing aircraft, by J. A. J. Bennett. Aircraft engineering,London, Jan. 1940, v. 12, p. 7-9. illus., tables.

Stressing of rotating-blade aerofoils, by J. B. B. Owen. Engi­neering, London, Nov. 3, 1939, v. 148, no. 3851, p. 511-13.i1lus.

British gyroplanes for cags, clubs and ovmer pilots. Aeroplane,London, Mar. 8, 1939, v. 46, no. 1450, p. 320a.

Principles of rotary aircraft, by Alexander Klemin. Journal ofthe Franklin institute, Philadelphia, Feb., Mar. 1939, v. 227,no. 2, 3, p. 219-49; 355-97. il1us., tables.

Windmill planes open new field in aviation, Popular science, NewYork, Feb. 1939, v. 134, p. 124-26.

Effect of rotation on the frequencies of lateral vibrations of arod, by J. Morris. Journal of the R.A.S., London, Dec. 1938,v. 42, no. 336, p. 1084-87. illus.

Un Nouveau gyroplane; Ie biplace Hafner ~~-IV. Les Ailes, Paris,Oct. 27, 1938, v. 18, p. 1-2.

A New Hafner design. Aeroplane, Londo~, Sep. 7, 1938, v. 55, no.1424, p. 290. illus.

Die Schwingungsbeanspruchung der rotorblatter von tragsschraubern,von A. PflUger. Ingenieur archiv, Berlin, Aug. 1938, v. 9,no. 4, p. 244-58. diagrs., il1us.

Der Hafner - tragschrauber. Zeitschrift des V.D.I., Berlin, July23, 1938, v. 82, p. 890-91. illus.

Notes tecru1iques. Les Ailes, Paris; July 14, 1938, v. 18, no.891, po 70

Leistungsvergleich eines tragschraubers mit einem drachenflugzeug,Zeitschrift des VoDolo, Berlin; July 2, 1938, v. 82, no. 27,po 811. diagrs., tables.

Heli.copte:r;es et gyroplanes, par P. Zens. Industries de voiesferrees et des transports automobiles, Paris, July 1938,v. 32, no. 379, p. 186-92. diagrs., tables.

28

GYROPLANES

Beitrag zur aerodynamik der drehflUgelflugzeuge, von G. Sissingh.Luftfahrtforschung, Mlinchen, June 6, 1938, v. 16, no. 6,p. 290-302. illus., tables.

Calculation of stresses acting on rotary wings, by J. Morris andw. Tye. Engineering, London, June 1938, v. 145, 2 p. ill~s.

Performance and control of rotary-wing aircraft, by E. B. Wilford.Journal of the Aeronautical sciences, New York, May 1938,v. 5, no. 7, p. 278-80. tables.

Breguet G-IO gyroplane. Interavia, Geneva, Apr. 26, 1938, no. 539,p. 5-6. illus.

Hafner AR-III molenvliegtuig. Vliegsport, Amsterdam, Apr. 1938,v. 3, no. 4, p. 5-8. illus.

Rotating wing aircraft, by I. V. Welsh. Shell aviation news,London, Mar. 1938, no. 81, p. 9-11. illus.

Fixed winged gyroplanes, by J. H. Crowe. Aircraft engineering,London, Feb. 1938, v. 10, no. 108, p. 39-46. il1us.

The Hafner gyroplane, by Raoul Hafner. Journal of the R.A.S.,London, Feb. 1938, v. 2, no. 326, p. 109-58. diagrs., illus.,tables. (Also Journal of the Cambridge university engineer­ing and aeronautical society, Cambridge, Jan. 1938, v. 13,p. 107-22)

Hafner and Cierva gyroplanes, by R. Hafner. Flight, London, No~.

11; 1937, v. 32, no. 1507, p. 471-72.

Gyrop1ane and autogiro, by J. A. J. Bennett. Flight, LO:.1.don, Oc-.28, 1937, v. 32, no. 1505, p. 25-26. il1us.

Les Aeronefs de l'avenir. Les gyroplanes Hafner. L'tcho desailes, Bruxel1es, Oct. 7, 1937, v. 7, no. 40, p. 474. i11~s.

Studio aerodinamico del girop1anoo L'Aerotecnica, Roma, Oct. 193 ,v. 17, no. 10, p. 840-49. il1us.

II Girop1ane "Breguet-Dormand". Rivista aeronautica, Roma, A:lg.1937, v. 13, no. 8, p. 313-15. il1us.

Les Gyrop1anes, par Louis Breguet. Societe des ingenieurs ci ilsde France, Paris, May-June 1937, v. 90, no. 3, p. 308-26.il1us.

Le Gyroplane. Sa technique et ses possibi1ites, par Louis Breguet.Revue aeronautique internationa1e, Paris, 'Mar. 1937, v. 7,no. 23, p. 26-51. diagrs., illus., tables.

AUTHOR INDEX

21,243

3,5,6,7,8,91,9,12,14,27

3,

5

2

4,16,19,2

McNair, Lesley J. 7,13Maurer, R. 10,11,25Mil, M. 18,20Miller, John H. 3,9,12,24Miller, John M. 5Mohring, T. 8Monaud, P. H. 3,7Morris, J. 3,6,15,19,27,28Mulvey, Hugh J. 1,5,1~

Nichols, E.S. 10Oehmichen, E. 4,16, 19~0,25,26

Owen, J.B.B. 12,14,17,27Perry, H.W. 14,2-PflUger, A. 2,3,5,15,18,20,2Piercy, N.A.V. 8Pivko, Svetopolk 6,8Plecan, Paul 15,23Poulsen, C.M. 5,14,16,18,2Prewitt, Richard H. 1,4,6,ry,_2

17Ramal10, MiguelRay, James G.Richard, G.C.Roger, HammerRose, D.Schrenk, M.Serragli, G.Shannon, Edward G.Sherwin, Samuel B.Shuckers, John M.Sikorski, I.Sissingh, G.Stanley, Paul H.Thomas, Lee S.TiTho, J.Trelease, W.V.Tripodi, A.Tye, W.Wagner, Robert A.Welsh, I.V.Wheatley, John B.Wilford, E.B. 3,6,

28Young, Arthu!'Zens, P.

7,18,2021

15,16,19,23,261,104,612

Asboth, O.D.BachBailey, Jr., F.J.Bennett, J.A.J.

28Bioletti, Carlton 7,8Breguet, Louis 28Brie, R.A.C. 13Campbell, Harris S. 1,5Cheremukhin, .A. 16Crowe, J.H. 28Daland, E. 6Denois, E. 13Ely, Louis B. 5Esche, C. 2,10,12Favier, Georges 4,7,10Florine, N. 14,17,22Focke, H. 7,15,16,17,19,20,22

23,24Goldschmidt, D. 3Goldschmidt, V. 3Goodall, A. 5,11Grey, C. G. 12Gustafson, F.B. 6,9Hafner, R.A. 3,7,9,21,26,28Haugen, Victor R. 1,5Haussmann, Ulrich 26Herrick, Gerard P. 2,8Hirs t, D.M• 7 , 8Hohenemser, K. 2,5,6,15,20Houllevigue, L. 5,7Izakson, A. 16Ja~es, T. 17Jarlaud, J. 13Karlson, Paul 4,19Karman, Theodorevon 20Klemin, Alexander 1,2,4,5,8,9

10,11,14,15,17,18,20,21,2223,24,25,27

Knight, M.KU~sner, H.G.Lame, M.Larsen, A.E.Lyman, Lauren D.McCollum, C.E.