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)UJt Base lf you are at all doubtful of your ability to makea steam engine, give your confidence a boost bymaking the base first. lt is simple. straightforwardand i{ you get your teacher to check your workat each stage you are sure to make a good jobof it.The base is made of mild steel. This metal isinexpensive and strong yet because only a thingauge is used it is quite easy to bend.246

IIr bend

j@

E(!).o

line

E Sixholes 3.5dia.(csk. under where sholvn)

trf)lc\ll

'--1;

Nl'-

bend

6

line A-

c!

BASE PLATE

PLATE IT tZOqIAN4.S. SHEET

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tq

fy

Sto)

[drill2+

LH]FILLER PLUG500

oLO

ASSEMBLY WICK TUBES-> 4 2

0)Eoo.o

12 ' ,-drilllOo).=!co-o

C).EEI

.*]I

AIdrill 5 r c.rV,il '=Eo)!9B

(3 off)n

C)

Ecq)BASE

FUEL TANK 0.4(28s)TINPLATE SUPPLY PIPE 5(Y,;) O.D. BRASS TUBEFILLER &WICKTUBES 9 (7s') LDx I I %;YQD.BRASS FILLER PLUG 12(4")or 14dia. ALUM ALLOY

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Firebox

illTdial I .l o--------ffi

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c\

)ed

)np

*l'L

STRAP BRACKET

BOILER STRAP -+.IL4, 3(%)dalT-ITdrill 3'5 &csk under

TIE RODS (4off) *l.l*drill fourholeslo I

drill 2'5(2'65or No.37)thread ISO M3 (58A.)

ASSEMBLED& BRACKETIM

sS

lat

TrthreaA ISO M3

.J- bend line

@O)

dia.

\v\2s l ru I 25 a-Y-2slzs-l'lI n"no tit*(oSIDES(2off)

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centre drilldrill 6'8thread lSo M B(% B.d.E)

tl I tttl , rl

I.liiIlat ,1.'l]

Il

48dia(2off)

BOILER BARREL

EXHAUST PIPE( bend to shaPe after annealing)

centre drilldrill3'3SLIGHTLY countersink

thread ISOM6(%6 B.:

FILLER BUSH SECTIONSAFETY VALVE

SUPPLY&EXHAUSTSTEAM PIPES

pilot drill 3drilll0

FLANGEDBOILER END. 7 ;t;' ' t,'. "!t'/

---.-\:-\- -\

r\.-' drill 3(/J after flanging

4%Tffii18dMPPER TUBEB6[FrNERRNEL i6(]-2ffiEEEsFRoniZrr*nffin FiFzu9]IBON.TR ENDS SAFETY VALVE- fl(z;)A.F. HEX-EnnSS-STERU PIPES 3('d.)O.D. COPPER TUTJE

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FRAME SPLIT PATTERN DETAILS FULL SIZE

SECTION ON C.L.

oil hole drill 3 and csk.

drill5( 5.4or No.4)bore 6(/ql x2sdeep

thread ISO M6(Z;B.S.E) 6)drill5(5'4orNo.4) I ^\]"

drill3(7a)r i-+

Erfr

I

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1Fl,f lywla fi[:burrmarkthe i

Engine components 1screwdriver slot

threacl ISO M6 (k' B.S.F.)

CRANKPIN

centre drilldrill 3 8counterbore 4dia.x Tdeep

+drill3

+cut recess withspecial tool

FJSECTION THROUGHFLYWHEEL

4dia. x 7O long

CRANKSHAFTFLYWHEEL 38or35fl%)diaBD.MS.CRANKSIiAFT 4diaSlLVER S|EELCRANKPIN 3dia SILVER STEELBEARING 6 (2Jdia.BRASS

JO

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1Cbrasprolcyls idtr" off

Engine components 2

CYLINDERaffi

END

CYLINDER ENDCYLINDER PI-ATE

drill 8'7( 9.3 or LETTER U)reamer 9(%)dia.

CYLINDER

PLATE

4tti l'a slRetin I

CYLINDER 12%Idl.. BRASS CYL. PLATE 12x3kzx!'ilBRASS CYL. END l9(t")dia. BRASS

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Engine components 3drill 2'5( 2'65 or No 37)thread ISO M3(58A.)

@rrra@_SPRINGcFltftR7 c.52o PVoT

s0d)dia.x30

drill 2.5(2.65orNo37)threacr lso M3(58A.)

Il4r4franholr:be Itoillthejawl

@-=AUJUSTINGNUT --1.

c'bore 3(k)x+ oeep l.Idrill1.5SECTION B.B

SEGTION A.A3(al

'bore 6x3deep

1 Pivsquirlmeilslo fttl.nwirsl{wid llr

'I

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Engine components 4

s(rd) dia. x 70 tong( later cut to correct length)

drill 2.5 (2.65 or No.37)threacl ISO M5 (58.A.)

CONNECTINGRODdrill 2-8(3or No31) x14deepcounter oore 3 (Zd)x Soeep

t12 Il--7.",',gLryruq)Eo?fa'no

BIG END

3(%)dia. B. D.MS.t