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Air of Authority - A History of RAF Organisation
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Mechanical Transport AP2782A (Section 6) - Breakdown Vehicles
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Crossley, 3 ton, 6x4 chassis with Breakdown
body
Crown Copyright© |
|
| RAF Ref No | not stated |
| Engine | Crossley, 4 cyl, petrol. Bore: 110mm (4.31 in), Stroke: 140 mm (5.5 in), Capacity: 5.266 litres (321.35 cu in). Max BHP - 90 at 2,500 rpm; Max torque - 2,940 lbs/ins at 1,000 rpm. RAC Rating - 29.8 hp |
| Transmission |
Clutch - Single dry plate Gearbox (Main) - 4 speed and 1 reverse. Ratios: 1st - 5.34 to 1, 2nd - 2.985 to 1, 3rd - 1.71 to 1, 4th - 1 to 1, reverse - 4.7 to 1: Auxiliary Box - 2 speed. Ratios - 1 to 1 (High) and 3.18 to 1 (Low). Front axle - 'H' Section Rear axle - ¾ -floating. Ration - 7.25 to 1. Overall ratios (High) - 38.71 to 1, 21.64 to 1, 12.4 to 1, 7.25 to 1, Reverse - 34.07 to 1. Overall ratios (Low) - 123.1 to 1, 68.8 to 1, 39.42 to 1, 23.05 to 1, Reverse - 108.3 to 1. |
| Performance | Max Speed - not stated; MPG - not stated; Radius of Action - not stated |
| Dimensions | Length - 22 ft 3 in; Width - 7 ft 6 in; Height - 10 ft 10 in; WB - 13 ft 3 in; G/C - 1 ft 2 in; TC - 55 ft 0 in; Track - 6 ft 3 in (front), 5 ft 11 in (rear) |
| Weights | Unladen - 5 tons 1 cwt; Laden - not stated. |
| Body |
Body - Open lorry body with front half enclosed as a
panelled van containing a workbench and bins. Rear half fitted
with drop-sides and tailboard. Mounted in the body is a 5 ton hand
operated Harvey Frost Ambulance crane. Cab - All enclosed seating driver and one passenger. |
| Suspension | Front - Semi elliptical with Gruss air spring. Rear - Dual inverted semi-elliptical. |
| Brakes |
Foot - vacuum servo
assisted on trailing rear wheels. Hand brake - mechanical on leading
rear wheels. Trailer brake connections - Single line vacuum on some models. |
| Wheels/Tyres | Split disc wheels/10.50-20 |
| Notes |
Steering - Cam and roller.
Also shown in AP2782, Section 6. |
| Breakdown Vehicle, 3 ton, 4x4, Crossley | |
| RAF Ref No | not stated |
| Engine | Crossley, 4 cyl, petrol, OHV. Bore: 110mm (4.31 in), Stroke: 140 mm (5.5 in), Capacity: 5.266 litres (321.35 cu in). Max BHP - 96 at 2,500 rpm, (governed to 2,500); Max torque - 2,770 lbs/ins at 1,500 rpm. RAC Rating - 29.8 hp |
| Transmission |
Clutch - Single dry plate Gearbox (Main) - 4 speed and 1 reverse. Ratios: 1st - 5.34 to 1, 2nd - 2.98 to 1, 3rd - 1.71 to 1, 4th - 1 to 1, reverse - 4.7 to 1: Auxiliary Box - 2 speed. Ratios - 1 to 1 (High) and 2.15 to 1 (Low). Front axle - Full-floating, Overhead worm gear, 7.75 to 1. Rear axle - Full-floating, Overhead worm gear, 7.75 to 1. Overall ratios (High) - 41.38 to 1, 23.10 to 1, 13.25 to 1, 7.75 to 1, Reverse - 36.42 to 1. Overall ratios (Low) - 88.96 to 1, 49.65 to 1, 28.49 to 1, 16.66 to 1, Reverse - 78.3 to 1. |
| Performance | Max Speed - not stated; MPG - 6.5; Radius of Action - 170 miles |
| Dimensions | Length - 20 ft 3 in (internal - 14 ft 10 in); Width - 7 ft 6 in (internal - 7 ft 0 in); Height - 11 ft 0 in (internal - 6 ft 6 in); WB - 11 ft 6 in; G/C - 1 ft 2¼ in (axles), 1 ft 11 in (belly); TC - 55 ft 0 in; Track - 6 ft 2-3/8 in (front), 5 ft 10½ in (rear) |
| Weights | Unladen - 4 tons 13 cwt; Laden - not stated. |
| Body |
Body - Open lorry body with front half enclosed as a
panelled van containing a workbench and bins. Rear half fitted
with drop-sides and tailboard. Mounted in the body is a 5 ton hand
operated Harvey Frost Ambulance crane. Cab - All enclosed seating driver and one passenger. |
| Suspension | Semi elliptical, front and rear |
| Brakes |
Foot - hydraulic vacuum servo
assisted on all wheels. Hand brake - mechanical on all wheels. Trailer brake connections - Single line vacuum. |
| Wheels/Tyres | Split disc wheels 20 x 8.37/12.00-20 singles |
| Notes |
Steering - Cam and roller.
Also shown in AP2782A, Section 6. |
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Recovery Vehicle, Wheeled,
6x4, Medium, Scammell SV/2S
Crown Copyright© |
|
| RAF Ref No | 16A/850 |
| Engine | Gardner, diesel, 6-cyl, direct injection, 102 bhp @ 1,750 rpm. |
| Gearbox | |
| Performance | Max Speed - ; MPG - ; Radius of Action - |
| Dimensions | Length - 21ft 6in; Width - 8ft 7in; Height - 11ft 9in; WB - 14ft 3in; G/C - 1ft 0in; TC - : |
| Weights | Unladen - 11 tons 8 cwt; Laden - : |
| Body | |
| Tyres | |
| Notes | Vehicle recovery and MT breakdown duties. Maximum tractive effort available - 15,830 lb |
|
Recovery Vehicle, Wheeled,
6x6, Medium, Scammell
Crown Copyright© |
|
| RAF Ref No | 16A/1391 |
| Engine | Scammell-Meadows, petrol, 6-cyl, direct injection, 175 bhp @ 2,400 rpm. |
| Gearbox | |
| Performance | Max Speed - ; MPG - ; Radius of Action - |
| Dimensions | Length - 20ft 6in; Width - 8ft 8in; Height - 10ft 6in; WB - 11ft 6in; G/C - 1ft 1in; TC - : |
| Weights | Unladen - 11 tons 13 cwt; Laden - : |
| Body | |
| Tyres | |
| Notes | Vehicle recovery and MT breakdown duties. Maximum tractive effort available - 21,930 lb |
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Diamond T, 6x6, Model 696B Breakdown
Crown Copyright© |
|
| RAF Ref No | not stated |
| Engine | Hercules RXC, 6-cyl. petrol, Bore: 117.4 mm (4.625 in), Stroke: 133.4 mm (5.25 in), Capacity: 8.6 litres (524.8 cu in). Max BHP - 131.5 at 2,300 rpm (governed); RAC Rating - 51.34 hp. |
| Transmission |
Clutch - Single dry plate. Gearbox - 5 speed and 1 reverse. Ratios: 1st - 7.08 to 1, 2nd - 3.82 to 1, 3rd - 1.85 to 1, 4th - 1 to 1, 5th - 0.768 to 1, reverse - 7.08 to 1: Auxiliary gearbox - 2-speed with PTO for winches. Ratios 1.155 to 1 and 1.72 to 1. Front axle - Timken, driving unit with double reduction differential. Ratio 8.435 to 1. Rear axle - Fully floating, spiral bevel drive, ratio 8.435 to 1. Overall Ratios (High) - 1st - 59.71to 1, 2nd - 31.14 to 1, 3rd - 15.61 to 1, 4th - 8.435 to 1, 5th - 6.479 to 1, Reverse - 59.71 to 1 Overall Ratios (Low) - 1st - 102.07 to 1, 2nd - 55.27 to 1, 3rd - 26.84 to 1, 4th - 14.51 to 1, 5th - 11.14 to 1, Reverse - 102.7: |
| Performance | Max Speed - 40 mph (on hard surfaced roads); MPG - 3.5; Radius of Action -175 miles. |
| Dimensions | Length - 24 ft 3-5/8 in; Width - 8 ft 5 in; Height - 9 ft 8 in; WB - 12 ft 7 in; BC - 4 ft 4 in; G/C - 11 in; TC - 73 ft; Track - 6 ft 1¾ in (front), 6 ft 0¾ in (rear): |
| Weights | Unladen - 8 tons 1 cwt, Laden - 9 tons 18 cwt. Standing tonnage - 48.94 tons. |
| Body |
Body - Constructed by Gar Wood, all steel mounted
rigidly to frame by long clamp bolts. Two large capacity tool
boxes are located atrear of body and contain chains, clamps,
tow-bars, anchors, welding equipment, etc.
Wrecker - Made by Ernest Holmes and consists of the wrecker transmission, two winches, two booms, two winch cables, two boom cables and pulley blocks to guide the cables. Two telescopic brace legs are fitted to either side of the structural frame. Front winch - Mounted in front and power driven through a 3-speed PTO mounted in the side of the vehicle transmission. Winch cable is 300 ft long and has a safe pull capacity of 15,00 lbs. Equipment - Air compressor, driven by single cylinder, four-stroke petrol engine. Acetylene welding equipment and tool set. Complete recovery equipment. Cab - All enclosed of steel panels seating driver and one passenger. |
| Suspension | Front - semi-elliptical. Rear - inverted semi-elliptical, with upper and lower torque rods. |
| Brakes |
Foot - Bendix-Westinghouse air pressure system on all wheels.
Hand - mechanical disc type on transmission in rear of auxiliary gearbox. Trailer connections - Two line air pressure type connections, front and rear. |
| Wheels/Tyres | 20.00-8/9.00-20 Trak-Grip, singles on front, dual on rear. |
| Notes |
Steering - Ross Cam and lever. Left hand drive Electrical equipment: Lighting -6V, Starter - 12V Also shown in AP2782, Group 4. |
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Ward la France, 6x6, Series 5, Heavy Breakdown
ton Crown Copyright© |
|
| RAF Ref No | not stated |
| Engine | |
| Gearbox | |
| Performance | Max Speed - ; MPG - ; Radius of Action - |
| Dimensions | Length - ; Width - ; Height - ; G/C - ; TC |
| Weights | Unladen - ; Laden - : |
| Body | |
| Tyres | |
| Notes | |
This page was last updated on 18/03/25©
