Air of Authority - A History of RAF Organisation
Plant Equipment - AP3036, Part 8 (1st Ed) & Part 9 (2nd Ed) - Pneumatic and Scarifying Equipment (to AL73)/Pneumatic and Road Breaking Equipment (AL73)
(1st Ed) indicates that the Part/Section was in the original 1st Edition of AP3036. (2nd Ed) indicates that the Part/Section was in the original 2nd Edition of AP3036, whilst the addition of AL? indicates which Amendment List, introduced this Part/Section following the original release of AP3036 (2nd Edition)
Holman Air Compressor, 210 cfm, Type T25 |
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Description |
The air compressor, illustrated above, is the Holman 210 cu. ft/mm. (free air) capacity and supplies air to pneumatic breakers, jack hammers, clay diggers and similar hand excavating and demolition tools at a pressure of 100 lb/sq. in. The plant consists of a power unit which is coupled to an air compressor unit. The two units are mounted in a steel frame, with four steel-tyred wheels and tow bar. The power unit is governed so that when the pressure in the storage tank reaches a certain point (generally 90 lb/sq. in.) the speed of the engine is reduced and, conversely, when the pressure is reduced the speed of the engine is increased. |
Operation |
The air compressor should be set level when working so that no damage will be caused by starving the engine of oil. The compressor should not be towed at a higher speed than 5 mph. |
Data |
Weight - 3 tons. Overall dimensions: - Length, including starting handle, but excluding drawbar - 12 ft. 3½ in. Width - 5 ft. 9½ in. Height, with plain road wheels - 6 ft. 5 in. Fuel tank capacity - 23 gallons. Air receiver capacity - 9 cu. ft. |
Holman Air Compressor, Type T36DD |
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Description |
MT required for transportation -
This item of equipment appears to have been added to the 2nd Edition by the issue of AL17. |
Engine/Compressor |
Engine - Dorman, Type 6DL3, 6 cylinder, water cooled, Diesel engine: Capacity - 12.21 litres (745.1 cu in): Compressor - Holman Type T36, Reciprocating, 2-cylinder two stage with intercooler between stages. |
Operating Data |
Normal (Max) operating speed - 1,000 rpm Free air delivery at normal speed - 360 cu ft Free air delivery at 100 PSI - 305 cu ft Maximum continuous air pressure - 125 PSI Intercooler pressure - 29 PSI |
Data |
Weight - 9,700 lb. Overall dimensions: -
Fuel tank capacity - 34 gallons. |
Holman Air Compressor, Type T25PM |
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Description |
MT required for transportation -
This item of equipment appears to have been added to the 2nd Edition by the issue of AL17. |
Engine/Compressor |
Engine - Meadows, Type 6EX/A, 6 cylinder, water cooled, petrol engine: Capacity - 9.5 litres (579.5 cu in): BHP - 120 at 2,000 rpm Compressor - Holman Type T25, Reciprocating, 2-cylinder two stage with intercooler between stages. |
Operating Data |
Normal (Max) operating speed - 1,000 rpm Free air delivery at 1,000 rpm and 100 PSI - 207 cu ft Maximum continuous air pressure - 125 PSI Intercooler pressure - 29 PSI |
Data |
Weight - 7,400 lb. Overall dimensions: -
Fuel tank capacity - 23 gallons. |
Schramm air compressor, Type 315 |
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Description |
MT required for transportation -
This item of equipment appears to have been added to the 2nd Edition by the issue of AL28. |
Engine/Compressor |
Engine - International, Type UD18, 6 cylinder, water cooled, Diesel engine: Capacity - 691 cu in: Compressor - Schramm, Reciprocating, 6-cylinder, single stage, water cooled Swept volume - 707 cu in |
Operating Data |
Operating speed - 1,800 rpm Delivery at 200 PSI - 315 cu ft/min Maximum continuous air pressure - 200 PSI |
Data |
Weight (dry) - 5 tons Overall dimensions: -
Fuel tank capacity - 40 US gallons. |
Air Pumps air compressor, 113 CFM (lorry mounted), Type TS20 |
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Description |
This item of equipment appears to have been added to the 2nd Edition by the issue of AL44. |
Engine |
Engine - Morris, 6 cylinder, water cooled, petrol engine: BHP - 37 at 1,500 rpm |
Compressor |
Cylinders - 2 Cylinder bore
Stroke - 4½ in. Piston displacement (cu. ft. per min) - 56 Delivery of free air per minute, at normal temperatures and pressures, not less than - 113 cu. ft. BHP absorbed - 32 RPM - 1,200 Working pressure
Oil relief valve setting - 15 to 20 lb per sq. in. Unloader, normal settings
Intercooler relief valve set for - 35 lb per sq. in. Receiver base safety valve set for - 110 lb per sq. in. |
Vehicle |
Make and type - Morris, 15 cwt. 4 x 4, lorry Weight (dry) - 7,840 lb Overall dimensions: -
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Air Pumps air compressor 105 cfm, (lorry mounted), Model D130 |
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Description |
This item of equipment appears to have been added to the 2nd Edition by the issue of AL47. |
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Compressor |
Cylinders - 2 Cylinder bore
Stroke - 4½ in. Piston displacement (cu. ft. per min) - 130 Delivery of free air per minute, at normal temperatures and pressures, not less than - 105 cu. ft. BHP absorbed -
RPM - 1,350 Working pressure
Oil relief valve setting - 15 to 20 lb per sq. in. Unloader, normal settings
Intercooler relief valve set for - 35 lb per sq. in. Receiver base safety valve set for - 110 lb per sq. in. Weight of compressor - 1 ton 12 cwt Overall dimensions: -
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Vehicle |
Suspension - Front and rear - Semi-elliptic, with hydraulic shock absorbers Brakes
Steering - Worm and sector Wheels - 6.00 x 20, W D divided type Tyres - Front and rear: 10.50-20, cross-country Make and type - Bedford, Type QL, 3 ton cwt. 4 x 4, lorry Clutch - Single dry plate, 10 in dia. Gear boxes
Gear ratios
Axles
Overall gear ratios
Engine - Bedford, 6 cylinder, water-cooled, petrol: Capacity - 3.518 litres (214.7 cu, in.): Compression ratio - 6.22 to 1: BHP - 72 at 3000 rpm (governed) Maximum torque - 1,944 lb in at 1,200 rpm MPG - 8 Radius of action - 224 miles Cab - Fully enclosed, steel panelled cab, seating driver and one passenger. Sliding panel in rear bulkhead. Overall dimensions: -
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Armstrong Whitworth pneumatic saw, Type PS-12 |
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Description |
This item of equipment appears to have been added to the 2nd Edition by the issue of AL53. |
Data |
Machine Capacity
Governed speed - 1,200 rpm Blade diameter - 12 in Overall Dimensions: -
Weight - 30 lb |
Broomwade air compressor, 210 cfm, Model SV245 |
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Description |
This item of equipment appears to have been added to the 2nd Edition by the issue of AL67. |
Engine/Compressor |
Engine - Gardner, 6LW, 6 cylinder, OHV, water cooled, Diesel engine: Capacity - 9.5 litres (579.5 cu in): BHP - 112 at 1,700 rpm Compressor - Broomwade, Model SV245, Sleeve-valve, single-acting, V4, 2 blocks, water cooled. |
Operating Data |
Max. safe towing speed - 30 m.p.h. Min. dia. turning circle - 41 ft. Air output - 210 cu. ft. per min. Air pressure - 100 lb. per sq. in. Air delivery connections - 6 delivery cocks, each ¾ in. BSP. |
Data |
Overall dimensions: -
Weights
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Bristol air compressor, 105 cfm (trailer mounted), Type ATS 138 PD |
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Description |
MT required for transportation -
This item of equipment appears to have been added to the 2nd Edition by the issue of AL68. |
Engine/Compressor |
Engine - Perkins, P6, 6 cylinder, OHV, water cooled, Diesel engine: BHP - 39 at 1,200 rpm Compressor - Bristol, 2-stage, V2, air cooled. |
Operating Data |
Max. safe towing speed - 20 m.p.h. Compressor displacement - 138 cu. ft. per min Delivery of free air, at normal temperatures and pressures - 105 cu ft per min Normal pressure - 100 lb. per sq. in. Air delivery connections - 4 x ¾ in. BSP spring-loaded cocks |
Data |
Overall dimensions: -
Weights
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Climax air compressor, 315 cfm, Model F 80CX (Truck mounted) |
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Description |
This item of equipment appears to have been added to the 2nd Edition by the issue of AL73. |
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Compressor |
Compressor - Climax F.80CX Type - Reciprocating, single acting, two-stage Cylinders - 6 (4 low pressure, 2 high pressure) Displacement - 394 cu, ft. per min. Horse power at compressor shaft - 80, with full compressor output at standard temperature and pressure . Cooling - Air Speed - 1,440 rpm. Clutch - Anderton, hand-operated plate Air receiver - Farrar fusion welded |
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Engine | Leyland, UE 600/26, 6-cylinder, OHV, water cooled, Diesel engine: BHP - 90 at 1,440 rpm (governed) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Vehicle | For details of Bedford, Type R, 3 ton, 4 x 4 Chassis - see AP2782A | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Ancillary Equipment |
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Operating Data |
Compressor Free air delivery - 315 cu, ft. per min Pressure - 100 lb. per sq. in. Capacity of air receiver - 13 cu. ft Temperature of air entering receiver (deg F above ambient) - 280 deg. F. Type of unloader - Suction type
Air delivery connections - 8 (4 at each end of air receiver) Truck Turning circle (dia) - 60 ft. Travelling speeds - see AP2782A |
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Data |
Overall dimensions: -
Weights (machine fully equipped)
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Air Pumps air compressor 105 cfm, Model D 130 (trailer mounted) |
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Description |
Stores Ref - 89E/41 MT required for transportation -
This item of equipment appears to have been added to the 2nd Edition by the issue of AL85. |
Engine/Compressor |
Engine - Perkins, PG 6, 6 cylinder, OHV, water cooled, Diesel engine: BHP - 42 at 1,350 rpm (governed) Compressor - Air Pumps, Model D130, 2-stage, 90 deg V2, air cooled with intercooler. |
Operating Data |
Piston displacement - 130 cfm at 1,350 rpm. Free air delivered (100 lb. per sq. in. gauge sea level) - 105 cfm. at 1,350 rpm. Working pressure (unloader setting)
Temperature of air at delivery manifold - Not more than 250 (leg. above ambient Air delivery connections - Four (two on each side of the air receiver tank) |
Data |
Overall dimensions: -
Weight (unladen) - 2 tons 0½ cwt |
The following Air Compressors appeared in the index of this section but no details seem to have been issued: -
Holman Air Compressor, Type T25DD
Ingersoll-Rand, Jackbit Grinder, Type JA3 |
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Description |
MT required for transportation -
This entry has been updated to AL33. |
Operating Data |
The jackbit grinder is operated by one man and all ordinary types of bits can be ground by the adjustments provided. Jackbits may be re-sharpened at least three times without re-hardening. Each re-grind reduces the bit to the next smaller gauge.Speed - Governed to 1,900 rpm free speed Direction of rotation - Counter-clockwise when facing gauge wheel. Coolant - 1 part soluble cutting oil ZX-1 and 40 parts water. Adjustments for various sizes of bits
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Technical Data |
Air Motor - Rotary multi-vane
type, Model No 4 (drill) Grinding wheels and pump drives - Belt Grinding wheels - 12 in x 1¼ in to 3 in Weight - 1,020 lb. Overall dimensions: -
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Holman Rotogrind, Model 40 TC (see Part 8 - Quarrying equipment)
Le Tourneau Heavy Duty Rooter, Model K30 |
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Description |
MT required for transportation -
This entry has been amended to AL13. |
Operation |
The power control unit on the tractor controls, by single wire cable, the digging depth and the lifting of the rooter teeth out of the ground. If necessary, "lift and pull" can be employed simultaneously to uproot large boulders or break up concrete slabs. The teeth are set at a forward angle and to break up concrete the correct method is to get the teeth under the slab and pull the rooter and lift the teeth at the same time. This breaks off the slab in large pieces, the wheels acting as a fulcrum. For clearing brush and bushes the rooter can be used in conjunction with a tractor fitted with angledozer blade. The tractor moves forward clearing the brush with the angledozer blade and at the same time towing the rooter which removes buried roots. It is important to note that the rooter should be used with its teeth fully embedded in the ground, but no attempt must be made to turn the tractor until the teeth have been withdrawn. When removing the rooter from the tractor it will be found that pulling the rooter teeth into the ground will keep the tow-bar level and facilitate re-attachment to the tractor when required. |
Data |
Number of shanks - 3. Depth of penetration - 30 in. Approximate weight - 14,560 lb. Overall dimensions: -
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Le Tourneau Light Duty Rooter, Model H3 |
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Description |
MT required for transportation -
This item of equipment appears to have been added to the 2nd Edition by the issue of AL13. |
Data |
Number of shanks - 3. Depth of penetration - 29 in. Approximate weight - 7,500 lb. Overall dimensions: -
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Armstrong Whitworth pneumatic clay digger |
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Description |
This item of equipment appears to have been added to the 2nd Edition by the issue of AL64. |
Data |
Makers designation - Size No. 424 Clay Digger Blade shank size - Hexagon 0.882 in. across flats (1.027 in. round) x 3.25 in. long with 1.625 in. dia. x 0.5 in. deep collar Weight - 22¼ lb. (less blade) Overall dimensions: -
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Drill, wagon mounted, Ingersoll-Rand Model FM2 |
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Description |
MT required for transportation -
This item of equipment appears to have been added to the 2nd Edition by the issue of AL17. |
Data |
Machine
Operating Data.
Dimensions: -
Weight - 1,500 lb |
Warsop road breaker, Type S6 |
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Description |
This item of equipment appears to have been added to the 2nd Edition by the issue of AL17. |
Data |
Machine
Engine.
Dimensions: -
Weight - 93 lb (less steel and fuel) |
Benoto machine, Type Genie 1950 |
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Description |
This item of equipment appears to have been added to the 2nd Edition by the issue of AL46. |
Engine | Renault, Type 630V, 4-cylinder, water cooled: BHP - 46 at 2,800 rpm |
Machine Specification |
Running gear - Four pneumatic tyred wheels Tyres - 270 x 20 Winch - Free fall, cone clutch, automatic internal brake.
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Technical Data |
Dimensions: -
Weight - 5 ton 16 cwt (without personnel) |
Drill, tripod mounted, Ingersoll-Rand, Model X-71 |
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Description |
This item of equipment appears to have been added to the 2nd Edition by the issue of AL50. |
Operating Data |
Operating pressure - Variable Length of feed (nominal) - 7 ft 0 in Maximum travel of feed - 8 ft 8½ in Maximum depth of hole - 24 ft |
Technical Data |
Dimensions (tripod legs not extended): -
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Armstrong Whitworth pneumatic paving breaker (Medium) |
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Description |
This item of equipment appears to have been added to the 2nd Edition by the issue of AL64. |
Data |
Makers designation - 70 lb class paving breaker, Size No 139 Pick shank size - Hexagon 1.125 in. across flats (1.299 in. round) x 6 in. long with 1.7 in. dia. x 0.625 in. deep collar Weight - 74 lb. (less pick) Overall dimensions: -
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Armstrong Whitworth pneumatic paving breaker (Medium) |
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Description |
This item of equipment appears to have been added to the 2nd Edition by the issue of AL64. |
Data |
Makers designation - 70 lb class paving breaker, Size No 139 Pick shank size - Hexagon 1.125 in. across flats (1.299 in. round) x 6 in. long with 1.7 in. dia. x 0.625 in. deep collar Weight - 74 lb. (less pick) Overall dimensions: -
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Climax jackhammer rock drill, RV 237/1 |
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Description |
This item of equipment appears to have been added to the 2nd Edition by the issue of AL67 and was moved to Part 8, Section 3 by AL73). |
Data |
Makers designation - Climax Type RV237 (dry) Drill shank size: -
Performance
Overall dimensions: -
Weight - 33¾ lb. (without drill steel) |
The dates of the various Amendment Lists are shown below: -
Amendment List |
Date of issue |
Amendment List |
Date of issue |
Amendment List |
Date of issue |
Amendment List |
Date of issue |
1 |
Mar 1951 |
26 |
Nov 1951 |
51 |
Aug 1952 |
76 |
Mar 1956 |
2 |
May 1951 |
27 |
Nov 1951 |
52 |
Nov 1952 |
77 |
May 1956 |
3 |
Jul 1951 |
28 |
Nov 1951 |
53 |
Mar 1953 |
78 |
May 1956 |
4 |
Jul 1951 |
29 |
Nov 1951 |
54 |
Mar 1953 |
79 |
Jun 1956 |
5 |
Aug 1951 |
30 |
Nov 1951 |
55 |
Mar 1953 |
80 |
Jul 1956 |
6 |
Sep 1951 |
31 |
Dec 1951 |
56 |
Apr 1953 |
81 |
Aug 1956 |
7 |
Sep 1951 |
32 |
Dec 1951 |
57 |
Apr 1953 |
82 |
Aug 1956 |
8 |
Sep 1951 |
33 |
Dec 1951 |
58 |
Jun 1953 |
83 |
Sep 1956 |
9 |
Sep 1951 |
34 |
Dec 1951 |
59 |
Jun 1953 |
84 |
Dec 1956 |
10 |
Sep 1951 |
35 |
Dec 1951 |
60 |
Jul 1953 |
85 |
Apr 1957 |
11 |
Sep 1951 |
36 |
Dec 1951 |
61 |
Sep 1953 |
86 |
Jul 1957 |
12 |
Sep 1951 |
37 |
Dec 1951 |
62 |
Sep 1953 |
87 |
Jul 1957 |
13 |
Sep 1951 |
38 |
Dec 1951 |
63 |
Feb 1954 |
88 |
Oct 1957 |
14 |
Sep 1951 |
39 |
Dec 1951 |
64 |
Mar 1954 |
89 |
May 1958 |
15 |
Sep 1951 |
40 |
Dec 1951 |
65 |
Aug 1954 |
90 |
May 1958 |
16 |
Sep 1951 |
41 |
Dec 1951 |
66 |
Sep 1954 |
91 |
Aug 1958 |
17 |
Sep 1951 |
42 |
Jan 1952 |
67 |
Oct 1954 |
92 |
Sep 1958 |
18 |
Oct 1951 |
43 |
Jan 1952 |
68 |
Oct 1954 |
93 |
Dec 1958 |
19 |
Oct 1951 |
44 |
Feb 1952 |
69 |
Dec 1954 |
94 |
Feb 1959 |
20 |
Oct 1951 |
45 |
Mar 1952 |
70 |
? |
95 |
Mar 1959 |
21 |
Nov 1951 |
46 |
Apr 1952 |
71 |
? |
96 |
Feb 1959 |
22 |
Nov 1951 |
47 |
May 1952 |
72 |
Sep 1955 |
97 |
Apr 1959 |
23 |
Nov 1951 |
48 |
Jun 1952 |
73 |
Nov 1955 |
98 |
Jul 1959 |
24 |
Nov 1951 |
49 |
Jun 1952 |
74 |
Nov 1955 |
99 |
Nov 1960 |
25 |
Nov 1951 |
50 |
Jul 1952 |
75 |
Feb 1956 |
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This page was last updated on 08/07/19