Triumph Spitfire MK3, Handbook

Page: 76 / 81

GENERAL SPECIFICATION
75
Fuses 35 amps.
Battery-Type Lucas D.9
Capacity at 20 hr. rate 40 amps. Hour
Plates per cell 9
Normal charging rate 3.5 amps.
Generator
Lucas C.40-1.
Output 264 watts.
Control box Lucas RB.430.
Flasher unit Lucas FL.5.
Fuel and temperature
indication Bi-metal type, 10 volt system
Oil pressure switch
operating pressure 4.5/7.5 p.s.i. (0.32/0.53 kg/cm
3
)
Transmission
Clutch Diaphragm type. 6 in. dia. (165 mm.)
Gearbox 4 speed constant mesh. Synchromesh on
2nd, 3rd and Top.
Top 3rd 2nd 1
st
& Rev.
Ration 1 1.39 2.16 3.75
Overall ratios 4.11 5.73 8.87 15.40
Overdrive {optional) Laycock de Normanville. Operates on
3rd and Top gears. Ratio 0.802:l
Rear axle Swing axle. Centre rubber mounted to
chassis. Hypoid bevel drive. Ratio 4.1l
to 1.
Wheels
Pressed steel disc type 3 ½ D rim. Wire
spoked wheels (optional).
Tyres 5.20S-13 Tubeless.
1.45-l3 Radial ply (optional).
Pressures See Page 25.
Brake System
Girling hydraulic. Centrally mounted
"fly-off" handbrake coupled
mechanically to rear wheels only.
Front Caliper disc 9 in. dia. (229 mm.).
Rear Drum 7 in. dia. (178 mm.) x 1
1
/
4
in.
(31.7 mm.) wide.
Front lining area l4.8 in
2
95 cm
2
Front swept area 150 in
2
962 cm
2
Rear lining area 34 in
2
225 cm
2
Rear swept area 55 in
2
353 cm
2
Total lining area 48.8 in
2
314 cm
2
Total swept area 205 in
2
1316 cm
2
Maximum retardation 0.98 g. equivalent to stopping from
30 m.p.h. (48 k.p.h.) in 31 ft. (9.45 m.)
Chassis Data
Frame Double backbone of closed channel
section with channel outriggers.
Wheelbase 6ft. 11 in. 2110 mm.
Track - Front 4 ft. 1 in. 1245 mm.
- Rear 4ft. 1220mm.
Ground clearance 5 in. 125 mm.