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BAKERv. *
Theory and Practicej
of Bicycle Race-Trackft
Construction
....
-
tw
Civil Engineering
B. S.
1901
UNiVKKSITYOF
JI.L. LIBRAM
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LIBRARYOF THE
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University of Illinois.^
BOOK. VOLUME.
U Accession No.^
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The person charging this material is re-
sponsible for its return to the library from jt-
which it was withdrawn on or before the
Latest Date stamped below.
Theft, mutilation, and underlining of books
are reasons for disciplinary action and mayresult in dismissal from the University.
UNIVERSITY OF ILLINOIS LIBRARY AT URBANA-CHAMPAIGN
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UNIVERSITY OF ILLINOIS
Hay _29j 1901. x
THIS IS TO CERTIFY THAT THE THESIS PREPARED UNDER MY SUPERVISION BY
Horatio V7eber Baker
ENTITLED Theory ».nd Practice of Bicycle Race-Track Construction
IS APPROVED BY ME AS FULFILLING THIS PART OF THE REQUIREMENTS FOR THE DEGREE
of Bachelor of Sc. i ence in Civil Engineering
head of department of Civil....Engineering.
5 2.800
BICYCLE RACE -TRACKS
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Present Practice
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Proportions of Field. X ^/^^
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TABLE I
PROPORTIONS OF FIELD
REPRESENTATIVE OF BEST CURRENT PRACTICE.
Arranged in order of Roundness
RefMo.
Nameof Tra c K
Lengthof Field
Widthof Field
RatioLength
of Track
Widthof Field
Rtati O
i Garfield Park 97£>.5 too 0.614 2 fa40 GOO 0. 227
2 Racine 499.6. 295 0.5 90 1520 295 0.225
3 Haw 1 ey 519. 6 27 5 0.523 1520 27 5 0.209
4 Walthtfrn 709.
O
30O 042 5 17<bO 300 o. no
5 n^nhattan 715.5 295 0.4 IO n<bo 2 95 0.1 68
Hean 0.513 Heoin 0.199
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TABLE HChords and Deflection Angles for Locating the
Spiral tor the Inside Edge of the Track
Point onS p i r«
1
Distance from the P.S.
along the curve
Deflection Angle at the
R 5. from the Initial Tangent
P. 5. o.o Feet 00
*I 25.0 0° I6'.3
Z 50.0 1° 05.1
3 75.0 Z° ZJO
4 IOO.0 4° 2l!o
5 \ZO.0 6° I5l6
6 140.0 8 930.7
PC.C. 155.47 IO° 53.'
7
TABLE HI
Rectangular Coordinates for Locating the
Spiral for the Inside Edge oftheTrack
Point on
Spiral
Distance from the P 5. on
the Tangent Prolonged
Offset Perpendicular
to the Tangent
P. 5 O.OO Feet 0.00 Feet
1 25.00 o.i 2.
Z 49.98 0.95
3 74. 8 8 3.20
4 99. 48 7.57
5 118. 71 13.03
6 1 31. 1 8 20.55
P. C.C. 153 10 29.58
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TABLE EZ"
Speed eor which the Bahkihg was Obstructed
h<ame of TrackSPEED
Feet per Second Time for one mile
Wtflfham & Lou'isvi lie 30.53 2 min. 53 sec.
Manhattan 34. Z4 Z - 34 "
Racine, Wis. 3fc. 17 Z - c(b -
Garfield Park 44.00 Z. " 00 «
Springfield fitfss. fc<b .00 1 " -
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3. Materials of Comstruction
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Fig. 5.
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