AEC, 6x6, Type 0854 chassis fitted with Coles Mk VII Series 7 Crane

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Gearbox - 4 speed and 1 reverse.  Ratios: 1st - 4.78 to 1, 2nd - 3.0 to 1, 3rd - 1.74 to 1, 4th - 1 to 1, reverse - 5.57 to 1:

Auxiliary gearbox- Ratios - 1.1 to 1 and 2.22 to 1.

Front axle - 'H' Section

Rear axle - Full floating, overhead worm drive, ratios 7.5 to 1.

Overall ratios (High) - 35.85 to 1, 22.5 to 13.05 to 1, 7.5 to 1, reverse - 41.78 to 1

Overall ratios (Low)- 79.6 to 1, 49.96 to 28.97 to 1, 16.65 to 1, reverse - 92.76 to 1

WB - 13 ft 0 in; BC - 4 ft 0 in; G/C - 11½ in (rear axle), 17½ (belly); TC - 55 ft; Track - 5 ft  11½ in (front), 5 ft 7¾ in (rear)

Tail radius - 5 ft 3 in.

Hoist and derrick motor - 6 hp, 900 rpm, series wound, totally enclosed

Slewing motor - 1 hp, 500 rpm, series wound, totally enclosed.

Cab - Open with folding canopy, seating two.  Later versions  - all enclosed with folding top.

Trailer brake connection - Single line vacuum (not fitted to all)

2 tons at 12 ft radius

1 tons at 19 ft 3 in radius

Maximum height of lift - 24 ft 6 in.

Also shown in AP2782, Group 4.

Bay City, 6x4, Model 18-T50 Crane

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Thornycroft, 6-ton, 6x4, Model WF/AC6/2 chassis fitted with Coles Mk VII Series 7 Crane

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Gearbox (Main) - 4 speed and 1 reverse.  Ratios: 1st - 5.13 to 1, 2nd - 2.75 to 1, 3rd - 1.56 to 1, 4th - 1 to 1, reverse - 7.69 to 1:

Gearbox (Auxiliary) - 2-speed.  Four-wheel drive on low ratio.  Ratios - (High) 1 to 1 and (Low) 2.5 to 1

Front Axle - 'I' Section.

Rear axle - Full floating, overhead worm drive, ratio 7.66 to 1.

Overall ratios (High) - 39.29 to 1, 21.06 to 11.95 to 1, 7.66 to 1, reverse - 58.89 to 1

Overall ratios (Low) - 98.22 to 1, 52.64 to 29.86 to 1, 19.14 to 1, reverse - 147.2 to 1

WB - 11 ft 9 in; BC - 4 ft 6 in; G/C - not stated; TC - 56 ft; Track - 6 ft 6 in (front), 6 ft 4¾ (rear)

Tail radius - 6 ft

Trailer brake connection - Single line vacuum.

Hoist and derrick motor - 6 hp, 900 rpm, series wound, totally enclosed

Slewing motor - 1 hp, 500 rpm, series wound, totally enclosed.

Fitted with RAF drawbar gear.

Cab - Open with folding canopy, seating two.  Later versions  - all enclosed with folding top.

3 tons at 13 ft radius

2 tons at 16 ft radius

1½ tons at 19 ft 3 in radius

Maximum height of lift - 28 ft.

Also shown in AP2782, Group 4.

Lorain, 6 ton, 6x4, Model MC3 Moto-Crane

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Gearbox - 5 speed and 1 reverse.  Ratios: 1st - 6.52 to 1, 2nd - 3.33 to 1, 3rd - 1.77 to 1, 4th - 1 to 1, 5th - 0.771 to 1, reverse - 6.5 to 1:

Auxiliary gearbox - 2 speed.  Ratio - 1 to 1 and 1.58 to 1.

Front axle - 'H' Section.

Rear axle - Timken overhead worm drive, ratio 9.25 to 1:

Overall ratios (High) - 60.3 to 1, 30.8 to 1, 16.37 to 1, 9.25 to 1,7.132 to 1, Reverse - 59.98 to 1.

Overall ratios (Low) - 95.28 to 1, 48.66 to 1, 25.87 to 1, 14.62 to 1, 11.27 to 1, Reverse - 94.77 to 1.

WB - 14 ft 7 in; BC - 4 ft 6 in; G/C - 12½ in; TC - 65 ft; Track - 6 ft 3 in (front); 6 ft 8¼ (rear).

The one-man forward control type driver's cab occupies less than half the width of the vehicle.  The space to the right of the cab (it is a left hand drive vehicle) is clear so that the crane boom can be lowered for the travelling position.  In this position the crane boom extends approximately 16 ft beyond the front of the vehicle.  The boom is fitted with boom stop cables to prevent derricking beyond an angle of 83 deg from the horizontal.  The crane has a 30 ft special type heavy duty and is mounted on fully revolving turntable and is powered by a Cummins diesel engine similar to the engine in the chassis. 

The chassis is equipped with outriggers for supporting the load when lifting.

• 7¼ tons at 10 ft radius
• 4½ tons at 20 ft radius
• 1¾ tons at 30 ft radius

Without outriggers: -

• 4 tons at 10 ft radius
• 2¾ tons at 20 ft radius
• 1½ tons at 30 ft radius

Maximum height of lift: -

• Front - 25 ft 9 in
• Sides - 28 ft 6 in
• Rear - 28 ft 6 in

Hand - External contracting brake acting on transmission. 

Electrical equipment - 6V. (12V on MC4 model)

Also shown in AP2782, Group 4.

Hyster, 4x2, 3½ ton, Crane

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Michigan, 4x2, 6 ton, Model T6K Crane

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Static condition - outriggers extended

10 tons @ 10ft radius

8 tons @ 12ft radius

6 tons @ 15ft radius

4½ tons @ 20ft radius

2½ tons @ 30ft radius

Fully mobile condition - outriggers retracted

7 tons @ 9ft 6in radius

5 tons @ 12ft radius

3½  tons @ 15ft radius

1¾ @ 27ft radius

1¼ tons @ 30ft radius

Maximum hook height 33ft 6in at 9ft radius 

The chassis is provided with a four-speed main gearbox and two-speed auxiliary gearbox, high ratio can be applied top four or six wheel drive but low ratio to six wheel drive only.  Towing pins are provided at the front and the rear but no provision is made for trailer braking. 

Provision is made for the attachment of sheer legs to the jib so that the maximum safe working load of 10 tons can be lifted at a radius of 26-27ft, in line with the chassis, when the crane is employed on aircraft salvage duties.

Ransome and Rapier, 2 ton, Mobile Crane

Taylor, Jumbo Light Crane

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Ransome and Rapier, 3½ ton, Mobile Crane

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AEC, Type A187K, Diesel, direct injection, 6-cyl, ohv, liquid cooled, 95 bhp @ 1,800 rpm

Static condition - outriggers extended

10 tons @ 10ft radius

8 tons @ 12ft radius

6 tons @ 15ft radius

4½ tons @ 20ft radius

2½ tons @ 30ft radius

Fully mobile condition -  outriggers retracted

7 tons @ 9ft 6in radius

5 tons @ 12ft radius

3½  tons @ 15ft radius

1¾ @ 27ft radius

1¼ tons @ 30ft radius

Maximum hook height 33ft 6in at 9ft radius

The chassis is provided with a four-speed main gearbox and two-speed auxiliary gearbox, a five ton winch is driven by a PTO from the auxiliary gearbox.  Towing jaws are fitted both at the front and the rear but no provision is made for trailer braking.  Provision is made for the attachment of sheer legs to the jib so that the maximum safe working load of 10 tons can be lifted at a radius of 26-27ft, in line with the chassis, when the crane is employed on aircraft salvage duties.

Ransome and Rapier, 8 ton, Mobile Crane

Ransome and Rapier, 8½ ton, Mobile Crane

Coles, 2 ton, Model EMA Mobile Crane

Hand brake - mechanical on two driving wheels.

Trailer connection - Single line vacuum system.

With jib horizontal : Length - 19 ft 10 in; Width - 7 ft 6 in; Height - 10 ft 6 in;

WB - 6 ft 6 in; G/C - not stated; TC - 57 ft 5 in (Right), 56 ft 8 in (left); Track - 5 ft 3 in.

Hoist and derrick motor - 6 hp, 900 rpm, series wound, totally enclosed

Slewing motor - 1 hp, 500 rpm, series wound, totally enclosed

Travel motor - 28 hp, 1220 rpm, series wound, totally enclosed. 

Automatic electro-magnetic brakes are fitted in the hoisting and slewing systems.  A semi-automatic brake , interlocked with the derrick control hand lever is fitted to the derrick stirrup shaft.

Lighting equipment - 6V NIFE Battery.

1¼ tons at 12 ft 3 in radius

Hughes Keenan, Model MC2L Crane