Exploded View of Engine & Remote Needle Assembly

ITEM DESCRIPTION QUANTITY

1 CRANKCASE 1 OFF

2 CRANKCASE BEARING 1 OFF

3 BARREL 1 OFF

4 CYLINDER HEAD 1 OFF

5 BACKPLATE 1 OFF

6 CRANKSHAFT 1 OFF

7 CONROD 1 OFF

8 PISTON 1 OFF

9 GUDGEON PIN 1 OFF

10 PIN END BUTTON 1 OFF

11 LINER 1 OFF

12 CARBURETTOR BODY 1 OFF

13 CARBURETTOR ROTOR 1 OFF

14 BARREL SPACER 1 OFF

15 NIPPLE 1 OFF

16 NEEDLE VALVE BODY 1 OFF

DRG No.

WF46-0003

WF46-0004

WF46-0005

WF46-0006

WF46-0007

WF46-0008

WF46-0009

WF46-0010

WF46-0011

WF46-0013

WF46-0012

WF46-0014

WF46-0015

WF46-0016

WF46-0017

WF46-0018

Project

R22.5

100

76

25

72

SIDE ELEVATION

38

28

PLAN VIEW

57

FRONT ELEVATION

Engine Specification

Bore - 21mm

Stroke - 18.4mm

RPM - 2,000-10,000

Prop - 11" x 6", 11" x 7"

???????????????????

Remote Needle Valve Assemblywith In-Flight Mixture Control ITEM DESCRIPTION

28

NEEDLE VALVE (O.S. OR CLONE PART)

19 ?????????????????????????????? 2 OFF

20 1 OFF

21 1 OFF

22 M3 X 12 LONG SOCKET CAP HEAD SCREW 4 OFF

23 5 OFF

24 4 OFF

25

26

27

THRUST WASHER (O.S. OR CLONE PART) 1 OFF

PART No.

O.S. No. 24081970

O.S. No. 22020001

??????????????????????????????

??????????????????????????????

M3 X 20 LONG SOCKET CAP HEAD SCREW

M3 X 10 LONG C/SK SOCKET HEAD SCREW

DRIVE WASHER (O.S. OR CLONE PART) 1 OFF O.S. No. 24008000

2 OFFM3 NYLOC NUT

18 18 SWG X 15mm LONG PIANO WIRE PIN 2 OFF

1 OFF

29

30

1 OFFM2.5 X 5 LONG PAN HEAD SCREW (ST.STL)

2 OFFM3 X 16 LONG SOCKET SET SCREW

SERVO HORN (MODIFIED FUTABA) Fut No. FUTM20301 OFF31

ENGINE DIMENSIONS

QUANTITY

17 IN-FLIGHT MIXTURE CONTROL DISC 1 OFF WF46-0019

ASSEMBLED ENGINE

View of Completed Crankcase

WF46-0003CRANKCASE

37.5

37.5

18.7

5

61.95

19.35

6.15

6.15

30.0

30.0

15

10.0

16.6

0

32

34.00

25.00

???

23.45

???

25

20.00

28.0

04.

75

18.7

5

15

6.75 R6

6.15

8

8

Section on A-AFront Elevation

4.35

4 - Holes M3 x 8mm Deep

4 - Holes M3 x 7 Deep

28.2

Rear Elevation

5

Plan View

Material - Aluminium Alloy HE30 (6082)

View of Alternative Crankcase (Without chamfering)

Chamfers OptionalChamfer Optional

12.2

5

????

?????????

AA

29.95

42.60

8.0

44.3

18.75 18.75

Project

RCM&E PLANS SERVICE

A .46cu. in. two-stroke glow engine. DESIGNED BY Alex Whittaker

PLAN No: RC2095 No. of Sheets: First published inRCM&E March. 2012

20.0

Section on A-AFront Elevation

A

WF46-0004CRANKCASE BEARING (Scale 2:1)

16.60

32

30.095

?????

A

???

Notes

1. 10mm intake hole to be bored withthe bearing pressed into crankcaseto ensure correct alignment.

2. This diameter to be a light pressfit inside crankcase.

Material - Bronze PB1

See Note 2.

12.0

0

WF46-0005BARREL

43

21.5

30.0

30.0

15

38.5

17.75

18.7

5

Front Elevation

??????????????

Plan View

Material - Aluminium Alloy HE30 (6082)

4.75

AA

3

34.00

37.47

5.4

21.8 1

1.535.3

3.5

8.4

4 - Holes M3 x 8 Deep

43

21.5

6.15

6.15

10.5

18.7

5

R6 typ

6.15

Section on B-B

4.75

17.75 Exhaust Port

6.15

B

3.5

2 - Holes 3.5 Dia

4.15 3.75

Transfer Ports 6mm Rad typ

40

1.5mm x 6 hole

Panel pin used to locate liner drill1.5 mm Hole x 6 Deep to suit Liner

36.5

0.75

10.7re

f

11.25 11.25

11.2

511

.25

37.3

2

???

36.5

2.75

C/Bore 6.2 Dia

???????

21.5

21.5

40

Section on A-A

Front Elevation

A

WF46-0006CYLINDER HEAD

40

A

Material - Aluminium Alloy HE30 (6082)

9.8

21.00

6.35

CompletedCylinder Head

Plan View

???

1.41.5

1.5 T

YP

????????????????????????????????????????????????????

20.5

3.60

14

2mm Chamfer

1mm Rad Plug thread 1/4" 32UNEF (O.S. #8 Plug) 22.5

22.5

R10

14

0.6

1.8 Typ u/cut

Section on A-A

WF46-0007BACKPLATE

A

Notes

1. This diameter is a close fit inside crankcase to avoid air leaks2. Copper fuel feed pipes to be a press fit into backplate

Material - Aluminium Alloy HE30 (6082)

15.5

1.5mm Chamfer

4 - Holes drill through??????????????????

13.4

9.65

???

20

57

25

5.8

??????????????????????

????????????????????????for copper fuel feedpipes (See note 2.)

Machined flat forpiston clearance

28

14Elevation on Rear of Plate

2.5

R22.5

Section on A-A

WF46-0008CRANKSHAFT

Material:-Crankshaft - Carbon Steel EN8M (212M36)Big end Pin - SilverSteel

Side Elevation

1.5mm Chamfer

Machined flatfor prop driver

End View

74.15

???

??

411

Ream

to

5.47

2127.8

34

32.15

7.8

8.5

12 5.6

26

0.5mm Rad

9.00

Thread 1/4" 28 TPI UNF

6.36

R25

40.15

1.5mm Chamfer

8 A

A

27.75

18.7

5

Completed Crankshaft

9.2

5

View on Arrow B

12.0

00

B

3.3

0.2

0.2

R4

???

14.25

5.50

0

Big End Pin(Silver steel)

Big End Pin(see detail)

0.25mm Chamfer

Drill and ream to suit bigend pin detailed below

16.2

Raised Area

Raised Area

Section on A-A

WF46-0009CONROD (scale 2:1)Material - H15 Duraluminium (2014)

?????????????????

A

4.43

2.15

3.05

== 6.

04

32.80

R4.5

8

A

R4

4.54

5.000

8.1

Completed Conrod

?????????

5.500

2.9

Front Elevation

Big end pin to be aninterference fit

General Notes

This drawing is to be used in conjunction with the RCM&E columnwrite up for machining methods, dimensional fits and assembly.

Typical Dimensional Tolerance

????????????????????????????????????????????????????????????????????????????????????????????????????????????????

Completed BackplateCompleted Bearing

28.15

see

note

1

A

2 of 3

WF46-0010

Project

RCM&E PLANS SERVICE

A .46cu. in. two-stroke glow engine. DESIGNED BY Alex Whittaker

PLAN No: RC2095 No. of Sheets: First published inRCM&E March. 2012

General Notes

This drawing is to be used inconjunction with the RCM&Ecolumn write up for machiningmethods, dimensional fits andassembly.

Typical Dimensional Tolerance

????????????????????????????????????????????????????????????????????????????????????????????????????????????????

Section on A-A

PISTON (Scale 2:1)Material - Cast IronUnderside

A

A

Completed Piston

21.00*

18.5

17

19.00

6

5.00

18.5

8.35

12

16.5

*NoteMake Liner prior to making Piston. OutsideDiameter to be lapped to size to match liner

19.5

R6

1mm Dia Hole forfuture GudgeonPin removal

Section on A-A

WF46-0011GUDGEON PIN (Scale 2:1)

Material - Silver Steel

A

A

Completed Gudgeon Pin

5.000

18.5

End Elevation

2.5

3

Chamfer 0.25mm

Notes-1. The Gudgeon pin diameter should be made to

a minimal clearance to match the piston.

Side View

Section on A-A

WF46-0012LITTLE END PLUG (Scale 4:1)

Material - Bronze

A

A

Completed Plug

End Elevation

Notes-1. Test fit the plug in the gudgeon pin & piston

to ensure a sliding fit within the liner.

1.1 3

2.51

5.0

R0.25

R10.5

View of Completed Liner

WF46-0013CYLINDER LINER

Section on A-AFront Elevation

Plan View

Material - Carbon Steel EN8M (212M36)

A

35.2

5

28.1

0.75

11.0

TSFR

11.0

TSFR

A

21.000

???Sectional Elevation on B-B

???

Outside of Liner Port Development

78.54 (25mm Dia)Circumference

34.5

Underside of Liner Lip

11.39 15.285

Bottom edge of Liner

11.3913.94 13.94

6.298 6.298

Section on A-A

Front Elevation

A

Material - Mild Steel or Brass

Completed Barrel

10.0

1 - Hole Drill & Tap M3

A

WF46-0015CARBURETTOR BARREL (Scale 2:1)

?????????????

12.6 9

.4

5.7

Section on A-AFront Elevation

A

Material - Aluminium alloy HE30 (6082) 3/4" (19mm) Hex Bar

Completed CarburettorBody

Plan View

2 - Holes Drill & Tap M3

WF46-0014CARBURETTOR BODY (Scale 2:1)

10

30.7

5

5.5

168

1.25

5

13.5

17.2

5

88

4

5.85

View on Arrow C

12.8

10.0

5.7

1 - Holes Drill & Tap M6

B B

Section on B-B

6.8

C

A

1- Hole Drill & TapM2.5 x 6 Deep

???

1.5

Venturi angle cut using aCountersink Drill

R2

???

18.7

5

??????

Section on A-A

Front Elevation

A

Material - Aluminium Alloy HE30 (6082)

Completed Carb Spacer

A

WF46-0016CARB BARREL SPACER (Scale 2:1)

?????????????

10.5

1.2

?????

?????

Plan View

Front Elevation

Material - Brass Hex Stock

Completed Nipple

WF46-0017NIPPLE (Scale 2:1)

?????????????????????

19

4.25

9.5

A/F

M6 Thread

9.5

5 2.7

5

3.5

2.35

4.25

2.25

Remove Sharp Corners

10.97ref

??

End Elevation

WF46-0018NEEDLE VALVE BODY (Scale 2:1)Material - Brass

A

A Completed Body

18.0

11.5

2

9

27

7.44.5

11 4

6.8

5.75

8.8

18

23

4.6

8

11.5

3.2*

1.2

4.5

Thread M4 x 0.5p????????????

??????????????????be a light press fit forcopper feed pipes

Notes- Suitable for O.S Needle No.24081970

Copper feed pipes tobe a light press fit

1.2

Section on A-A

WF46-0019MIXTURE CONTROL DISC (Scale 2:1)

Material - Aluminium Alloy HE30 (6082)

A

Completed Disc

8.5

1.3

11.6

???

6.8

?????

1 Hole drill tosuit for clevis

????????????????????????????????????????????

R10

A

Section on A-A

8.2

Section on A-A

WF46-0020PROP DRIVER (Scale 2:1)

Front Elevation

A

A

Completed Driver

7.54

9.15

22.7

5

3.37

5

5.04 Key depth

17.8

Key

2.94???

Serrated frontface 40 off0.3mm deep

Rear Elevation

9.15

11.5

R10

6

8

0.5

Material - Aluminium Alloy HE30 (6082)3 of 3

R22.5

100

Title Scale:-

Drawing Number

Drawn

DateProjection

Sheet A3

??????????????????????????????????????????

First published in RCM&E magazine February / March 2012.

76

25

72

SIDE ELEVATION

38

28

1:1

WF46-0001Engine General Arrangement

PLAN VIEW

57

FRONT ELEVATION

Motor Specification

Bore - 21mm

Stroke - 18.4mm

RPM - 2,000-10,000

Prop - 11" x 6", 11" x 7"

40

???????????????????

Remote Needle Valve Assemblywith In-Flight Mixture Contol

Scale:-

DrawingNumber

Drawn

Date

Title

First published in RCM&E magazine February / March 2012.

Third Angle Projection

Project

Sheet Size:- A12:1

WF46-0002

Exploded View ofFIREFLY 46Exploded View of Engine & Remote Needle Assembly

3

4

1

2

11

5

6

7

8

9

10

24

29

22

17

30

23

31

27

13

14

12

15

25

23

22

19

20

21

ITEM DESCRIPTION QUANTITY

1 CRANKCASE 1 OFF

2 CRANKCASE BEARING 1 OFF

3 BARREL 1 OFF

4 CYLINDER HEAD 1 OFF

5 BACKPLATE 1 OFF

6 CRANKSHAFT 1 OFF

7 CONROD 1 OFF

8 PISTON 1 OFF

9 GUDGEON PIN 1 OFF

10 PIN END BUTTON 1 OFF

11 LINER 1 OFF

12 CARBURETTOR BODY 1 OFF

13 CARBURETTOR ROTOR 1 OFF

14 BARREL SPACER 1 OFF

15 NIPPLE 1 OFF

16 NEEDLE VALVE BODY 1 OFF

17 IN-FLIGHT MIXTURE CONTROL DISC 1 OFF

28

NEEDLE VALVE (O.S OR CLONE PART)

19 ?????????????????????????????? 2 OFF

20 1 OFF

21 1 OFF

22 M3 X 12 LONG SOCKET CAP HEAD SCREW 4 OFF

23 5 OFF

24 4 OFF

25

26

27

THRUST WASHER (O.S. OR CLONE PART) 1 OFF

DRG/PART No.

WF46-0003

WF46-0004

WF46-0005

WF46-0006

WF46-0007

WF46-0008

WF46-0009

WF46-0010

WF46-0011

WF46-0013

WF46-0012

WF46-0014

WF46-0015

WF46-0016

WF46-0017

WF46-0018

WF46-0019

O.S. No. 24081970

O.S No. 22020001

??????????????????????????????

??????????????????????????????

M3 X 20 LONG SOCKET CAP HEAD SCREW

M3 X 10 LONG C/SK SOCKET HEAD SCREW

DRIVE WASHER (O.S. OR CLONE PART) 1 OFF O.S No. 24008000

2 OFFM3 NYLOC NUT

26

18 18 SWG X 15mm LONG PIANO WIRE PIN 2 OFF

18

28

1 OFF

16

29

30

1 OFFM2.5 X 5 LONG PAN HEAD SCREW (ST.STL)

2 OFFM3 X 16 LONG SOCKET SET SCREW

SERVO HORN (MODIFIED FUTABA) Fut No. FUTM20301 OFF31

View of Completed Crankcase

Title Scale:-

Drawing Number

Drawn

DateProjection

Sheet A3

??????????????????????????????????????????

First published in RCM&E magazine February / March 2012.

1:1

WF46-0003Crankcase Details

37.5

37.5

18.7

5

61.95

19.35

6.15

6.15

30.0

30.0

15

10.0

16.6

0

32

34.00

25.00

?

?

?

23.45???

25

20.00

28.0

04.

75

18.7

5

15

6.75 R6

6.15

8

8

Section on A-AFront Elevation

4.35

4 - Holes M3 x 8mm Deep

4 - Holes M3 x 7 Deep

28.2

Rear Elevation

5

Plan View

Material - Aluminium Alloy HE30 (6082)

View of Alternative Crankcase (Without chamfering)

Chamfers OptionalChamfer Optional

General Tolerance????????????????????????

????????????????????????

????????????????????????

?????????????????????????

???????????????

12.2

5

????

?????????

AA

29.95

42.60

8.0

44.3

18.75 18.75

20.0

Section on A-AFront Elevation

General Tolerance????????????????????????

????????????????????????

????????????????????????

?????????????????????????

???????????????

A

Scale:-

Drawing Number

Drawn

Date

Title

Projection

Sheet A4

First published in RCM&E magazine February / March 2012.

??????????????????????????????????????????

2:1

WF46-0004Crankcase Bearing

16.60

32

30.095

?

?

?

?

?

A

?

?

?

Notes1. 10mm intake hole to be bored with

the bearing pressed into crankcaseto ensure correct alignment.

2. This diameter to be a light press fitinside crankcase.

Material - Bronze PB1

See Note 2.

12.0

0

Title Scale:-

Drawing Number

Drawn

DateProjection

Sheet A3

??????????????????????????????????????????

First published in RCM&E magazine February / March 2012.

1:1

WF46-0005Barrel Details

43

21.5

30.0

30.0

15

38.5

17.75

18.7

5

Front Elevation

??????????????

Plan View

Material - Aluminium Alloy HE30 (6082)

General Tolerance????????????????????????

????????????????????????

????????????????????????

?????????????????????????

???????????????

4.75

AA

3

34.00

37.47

5.4

21.8 1

1.5

35.3 3.5

8.4

4 - Holes M3 x 8 Deep

43

21.5

6.15

6.15

10.5

18.7

5

R6 typ

6.15

Section on B-B

4.75

17.75 Exhaust Port

6.15

B

3.5

2 - Holes 3.5 Dia

4.15 3.75

Transfer Ports 6mm Rad typ

40

1.5mm x 6 hole

Panel pin used to locateliner drill 1.5 mm Hole x 6Deep to suit Liner

36.5

0.75

10.7ref

11.25 11.25

11.2

511

.25

37.3

2

?

?

?

36.5

2.75

C/Bore 6.2 Dia?

?

?

?

?

?

?

21.5

21.5

40

Section on A-A

Front Elevation

General Tolerance????????????????????????

????????????????????????

????????????????????????

?????????????????????????

???????????????

A

Scale:-

Drawing Number

Drawn

Date

Title

Projection

Sheet A4

First published in RCM&E magazine February / March 2012.

??????????????????????????????????????????

1:1

WF46-0006Cylinder Head

40

A

Material - Aluminium Alloy HE30 (6082)

9.8

21.00

6.35

CompletedCylinder Head

Plan View

?

?

?

1.4

1.51.

5 TY

P

??????????????????????????

??????????????????????????

20.5

3.60

14

2mm Chamfer

1mm RadPlug thread 1/4"32 UNEF(O.S. #8 Plug)

22.5

22.5

R10

14

0.6

1.8 Typ u/cut

Section on A-A

General Tolerance????????????????????????

????????????????????????

????????????????????????

?????????????????????????

???????????????

A

Scale:-

Drawing Number

Drawn

Date

Title

Projection

Sheet A4

First published in RCM&E magazine February / March 2012.

??????????????????????????????????????????

1:1

WF46-0007Motor Backplate

A

Notes1. This diameter is a close fit inside

crankcase to avoid air leaks2. Copper fuel feed pipes to be a press

fit into backplate

Material - Aluminium Alloy HE30 (6082)

15.5

Plan View

1.5mm Chamfer

4 - Holes drill through??????????????????

13.4

9.65

?

?

?

2057

28.1

5se

e no

te 1

25

5.8

??????????????????????

????????????????????????

for copper fuel feedpipes (See note 2.)

Machined flat forpiston clearance

28

14

Elevation on Rear of Plate

2.5

R22.5

Section on A-A

General Tolerance????????????????????????

????????????????????????

????????????????????????

?????????????????????????

???????????????

Scale:-

Drawing Number

Drawn

Date

Title

Projection

Sheet A4

First published in RCM&E magazine February / March 2012.

??????????????????????????????????????????

1:1

WF46-0008Crankshaft

Material - Carbon Steel EN8M (212M36)

Side Elevation

1.5mm Chamfer

Machined flat forprop driver

End View

74.15

?????

411

Rea

m t

o 5.

47

2127.8

34

32.15

7.8

8.5

12 5.6

26

0.5mm Rad

9.00

Thread 1/4" 28 TPI UNF

6.36

R25

40.15

1.5mm Chamfer

8 A

A

27.75

18.7

5Completed Crankshaft

9.2

5

View on Arrow B

12.0

00

B3.

3

0.2

0.2

R4

?

?

?

14.25

5.50

0

Big End Pin(silver steel)

Big End Pin(see detail)

0.25mm Chamfer

Drill and ream to suit bigend pin detailed below

16.2

Raised Area

Raised Area

Section on A-AGeneral Tolerance????????????????????????

????????????????????????

????????????????????????

?????????????????????????

???????????????

Scale:-

Drawing Number

Drawn

Date

Title

Projection

Sheet A4

First published in RCM&E magazine February / March 2012.

??????????????????????????????????????????

2:1

WF46-0009Conrod

Material - H15 Duraluminium (2014)

?????????????????

A

4.43

2.15

3.05

== 6

.04

32.80

R4.5

8

A

R4

4.54

5.000

8.1

Completed Conrod

?

?

?

?

?

?

?

?

?

?

5.5002.

9

Section on A-A

General Tolerance????????????????????????

????????????????????????

????????????????????????

?????????????????????????

???????????????

Scale:-

Drawing Number

Drawn

Date

Title

Projection

Sheet A4

First published in RCM&E magazine February / March 2012.

??????????????????????????????????????????

2:1

WF46-0010Piston

Material - Cast Iron

Underside

A

A

Completed Piston

21.00*

18.5

17

19.00

6

5.00

18.5

8.35

12

16.5

*NoteMake Liner prior to making Piston. OutsideDiameter to be lapped to size to match liner

19.5

R6

1mm Dia Hole forfuture GudgeonPin removal

Section on A-A

General Tolerance????????????????????????

????????????????????????

????????????????????????

?????????????????????????

???????????????

Scale:-

Drawing Number

Drawn

Date

Title

Projection

Sheet A4

First published in RCM&E magazine February / March 2012.

??????????????????????????????????????????

2:1

WF46-0011Gudgeon Pin

Material - Silver Steel

A

A

Completed Gudgeon Pin

5.000 18.5

End Elevation2.

5

3

Chamfer 0.25mm

Notes-1. The Gudgeon pin diameter should be made to a minimal

clearance to match the piston.

A 5mm Diameter Engineering Dowel pin may besubstituted for this item just cut/ grind length to suit.

Section on A-A

General Tolerance????????????????????????

????????????????????????

????????????????????????

?????????????????????????

???????????????

Scale:-

Drawing Number

Drawn

Date

Title

Projection

Sheet A4

First published in RCM&E magazine February / March 2012.

??????????????????????????????????????????

4:1

WF46-0012Little End Plug

Material - Bronze

A

A

Completed PlugEnd Elevation

Notes-1. Test fit the plug in the gudgeon pin &

piston to ensure a sliding fit within the liner.

1.1 3

2.51

5.0

R0.25

R10.5

View of Completed Liner

Title Scale:-

Drawing Number

Drawn

DateProjection

Sheet A3

??????????????????????????????????????????

First published in RCM&E magazine February / March 2012.

1:1

WF46-0013Cylinder Liner

Section on A-AFront Elevation

Plan View

Material - Carbon Steel EN8M (212M36)

General Tolerance????????????????????????

????????????????????????

????????????????????????

?????????????????????????

???????????????

A

35.2

5

28.1

0.75

11.0

TSFR

11.0

TSFR

A

21.000

???

Sectional Elevation on B-B

???

Outside Line Port Development

78.54 (25mm Dia)Circumference

34.5

Underside of Liner Lip

11.39 15.285

Bottom edge

11.3913.94 13.94

6.298 6.298

Section on A-AFront Elevation

General Tolerance????????????????????????

????????????????????????

????????????????????????

?????????????????????????

???????????????

A

Material - Aluminium alloy HE30 (6082) 3/4" (19mm) Hex Bar

Completed Carburettor Body

Plan View

2 - Holes Drill & Tap M3

Title Scale:-

Drawing Number

Drawn

DateProjection

Sheet A3

??????????????????????????????????????????

First published in RCM&E magazine February / March 2012.

2:1

WF46-0014Carburettor Body

10

30.7

5

5.5

168

1.25

5

13.5

17.2

5

88

45.

85

View on Arrow C

12.8

10.0

5.7

1 - Holes Drill & Tap M6

B B

Section on B-B

6.8

C

A

1- Hole Drill & TapM2.5 x 6 Deep

???

1.5

Venturi angle cut using aCountersink Drill

R2

???

18.7

5??????

Section on A-A

Front Elevation

General Tolerance????????????????????????

????????????????????????

????????????????????????

?????????????????????????

???????????????

A

Material - Mild Steel or Brass

Completed CarburettorBarrel

10.01 - Hole Drill & Tap M3

A

Scale:-

Drawing Number

Drawn

Date

Title

Projection

Sheet A4

First published in RCM&E magazine February / March 2012.

??????????????????????????????????????????

2:1

WF46-0015Carburettor Barrel

?????????????

12.6 9

.4

5.7

Section on A-A

Front Elevation

General Tolerance????????????????????????

????????????????????????

????????????????????????

?????????????????????????

???????????????

A

Material - Aluminium Alloy HE30 (6082)

Completed Carb Spacer

A

Scale:-

Drawing Number

Drawn

Date

Title

Projection

Sheet A4

First published in RCM&E magazine February / March 2012.

??????????????????????????????????????????

2:1

WF46-0016Carb Barrel Spacer

?????????????

10.5

1.2

?????

?????

Spacer Arrangement

Futaba Servo Arm

Spacer

Plan View

Front Elevation

General Tolerance????????????????????????

????????????????????????

????????????????????????

?????????????????????????

???????????????

Material - Brass Hex Stock

Completed Nipple

Scale:-

Drawing Number

Drawn

Date

Title

Projection

Sheet A4

First published in RCM&E magazine February / March 2012.

??????????????????????????????????????????

2:1

WF46-0017Nipple

?????????????????????

19

4.25

9.5

A/F

M6 Thread

9.5

5

2.75

3.5

2.35

4.25

2.25

Remove Sharp Corners

10.97ref

??

Section on A-AGeneral Tolerance????????????????????????

????????????????????????

????????????????????????

?????????????????????????

???????????????

Scale:-

Drawing Number

Drawn

Date

Title

Projection

Sheet A4

First published in RCM&E magazine February / March 2012.

??????????????????????????????????????????

2:1

WF46-0018Needle Valve Body

Material - Brass

A

A Completed Body

18.0

11.5

2

9

27

7.44.5

11 4

6.8

5.75

8.8

18

23

4.6

8

11.5

3.2*

1.2

4.5

Thread M4 x 0.5p????????????

??????????????????

be a light press fit forcopper feed pipes

Notes- To be suitable for O.S Needle No.24081970

Copper feed pipes tobe a light press fit

1.2

General Tolerance????????????????????????

????????????????????????

????????????????????????

?????????????????????????

???????????????

Scale:-

Drawing Number

Drawn

Date

Title

Projection

Sheet A4

First published in RCM&E magazine February / March 2012.

??????????????????????????????????????????

2:1

WF46-0019Mixture Control Disc

Material - Aluminium Alloy HE30 (6082)

A

Completed Disc

8.5

1.3

11.6

???

6.8

?????

1 Hole drill tosuit for clevis

????????????????????????????

????????????????

R10

A Section on A-A

8.2

Section on A-A

General Tolerance????????????????????????

????????????????????????

????????????????????????

?????????????????????????

???????????????

Scale:-

Drawing Number

Drawn

Date

Title

Projection

Sheet A4

First published in RCM&E magazine February / March 2012.

??????????????????????????????????????????

2:1

WF46-0020Prop Driver

Material - Aluminium

Front Elevation

A

A

Completed Driver

7.549.

15

22.7

5

3.37

5

5.04 Key depth

17.8

Key

2.94?

?

?

Serrated front face40 off 0.3mm deep

Rear Elevation

9.15

11.5

R10

6

8

0.5