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Aviation History
1931
1931 - 0858.PDF
FLIGHT, AUGUST 14 1931 AVRO "MAILPLANE" TYPE 627. (Armstrong-Siddeley " Jaguar Major."525 h.p. at 2,000 r.p.m. at 3,000//. (914,4 w.). Gearratio 1-0: 0-657.) PERFORMANCE WITH FULL LOAD (Within 2£ per cent, in speed and 5 per in climb.) SPEED.— Maximum speed at sea level „ 3,000 ft. (914,4 m.) .. „ 5,000 ft. (1 524,0 m.) .. „ 10,000 ft. (3 048,0 m.) .. „ 15,000//. (4 572,0 m.) .. Landing speed Cruising speed at 3,000 ft. (914,4m.) at three- quarters normal power Duration at 147 m.p.h. (236,6 km.p.h.) cent. 170 m.p.h. (273,6 km.p.h. 170 m.p.h. (273,6 km.p.h. 168 m.p.h. (270,5 km.p.h. 160 m.p.h. (257,5 km.p.h. 149 w.p.A. (239,8 /jm^A 66 m.p.h. (106,2 km.p.h. Cruising speed at 3,000//. (914,4 tn.) at two- thirds normal power Duration at 140 m.p.h. (225,3 km.p.h.) .. CLIMB.— ' \ Rate of climb at sea level Time to 1,000//. (304,8 m.) 5,000//. (1 524,0 m.) ,, 10,000ft. (3 048',0w.) „ 15,000//. (4 572,0 m.) Service ceiling Absolute ceiling DIMENSIONS.— Span of top wings Span of bottom wings Span of tail plane Height overall Length overall. . Chord of top wing Chord of bottom wing Gap between wings Chord of tail plane AREAS.— Main planes with ailerons Ailerons only Tail planes Elevators Rudder Fin WEIGHTS.— Weight of aircraft, light Electric starting gear Engine driven generator and drive .. Accumulator (starting, lighting and WjT) Navigation lights and wiring . . Landing light gear and wiring Radio Beacon receiver W jT 147 m.p.h. (236,6 km.p.h. 3-8 hr. 560 miles (901,2 km.) 140 m.p.h. (225,3 km.p.h.) 4 • 3 hr. 600 miles (965,6 km.) 1,200 ft.jmin. (6,1 m./sec.) 0-83 min. 4 • 30 min. \0-50 min. 23-00 min. 17,500//. (5 334,0 m.) 19,000//. (5 791,2 m.) 36 ft. 0 in. (11,0m.) 32//. Oin. (9,7 m.) 12 ft. 0 in. (3,6 m.) 10//. 6 in. (3,2 m.) 30 ft. 10 in. (9,4 m.) 7'ft. Oin. (2,1 m.) 5'ft. Oin. (1,5 m.) 5 ft. 4 in. (1,6 m.) Aft. 3 in. (1,2 m,) 381-0 sq. ft. (35,39m2.) 32-0 sq.ft. (2,97 m2. ) 24-7 sq.ft. (2,39 m2. ) 16-8 sq. ft. (1,56 w2. ) 16-0 5?.//. (1,48 m2. ) 5 0 sq.ft. (0,46 m2. ) 3,077 Ib. (1 395,7 kg.) 17 Ib. ( 7,7 kg.) 25/6. (11.3 A^.) 39 Ib. (17,7 kg.) 6 Ib. ( 2,7 kg.) 22 Ib. (10,0 kg.) 32 Ib. (14,5 kg.) 141 Ib. (63,9 kg.) Tare weight of aircraft with all equipment . . 3,218 Ib. (1 459,6 kg.) Pilot with parachute 190/6.(86,2^.) Fuel (100 gall.) (454.6 /.) 765 Ib. (347,0kg.) Oil (10-7 gall.) (48,6 /.) 107 Ib. (48,5 kg.) 1 062 Ib. (481,7 kg.) Maximum mail load 870/6. (394,6 kg.) GROSS WEIGHT FULLY LOADED 5,150 Ib. (2 335,9 804 ON BALL BEARINGS: The aileron and elevator hinges are of the ball bearing typ--, and are not divided, the balls being put into the bearing at the coincidence of a groove in the centre sleeve and a notch in the outer (Continued from p. 802.) mounting is the section carrying the two fuel tanks, having a large rectangular one in the middle slung on steel straps, with a shaped gravity tank above it. Abaft this is the mail compartment, which is com- pletely lined with duralumin-asbestos-dura- lumin, and provides 40 cubic ft. of cleai space inside it. A folding lid of the same material opens towards the starboard side of the machine, and provides a large-size entrance for loading. This half of the lid is further divided into halves, so as to in- commode the loading operation as little as possible. Directly behind the mail compartment is the pilot's cockpit, and, being situated thus far aft, the pilot should have an excellent view in all directions; moreover, his posi- tion should make him very safe and give him every chance of surviving in the event of a crash. No pains have been spared to make the pilot's job as comfortable as possible, so that long-distance flights should present no difficulty. The seat is adjustable in the same manner as in the Avro Tutor, the operating lever being situated on the right-hand side, the handle part of this lever being, as are all the other handles and levers in the cockpit " Doverised," in order that the pilot should have no trouble through touch- ing cold metal in very low temperatures The rudder bar is easily adjustable in flight by means of a small hand wheel mounted directly in line with the pivot, in the same manner as other Avro machines. In thfi standard position, on the port side of the cockpit, is a wheel for adjusting the tail plane; a refinement is an indicator for showing the tail setting. All fuel system controls are situated on the right-hand side of the cockpit, enabling either or both tanks to be connected direct to the car- burettor, and there is also a lever to a hand-worked Vickers pump for use in case the engine pump breaks down. Landing lights, which are fitted in the bottom wings, can be swung down to the landing position by means of another control, and another lever on the same side opens or closes louvres in the engine cowling to regulate the engine temperature. Cockpit heating is provided direct from the exhaust, with openings under either heel board, thus keeping the pilot's feet warm, as well as heating the cockpit. Special instruments include a Pioneer bank and turn indicator, and a climb indicator, a button on the dashb*oard controlling the Eclipse elec- tric inertia starter. Arrangements are also made for releasing the American-type para- chute flares for emergency landing. A receiver for the Western Electric radio beacon is situated on the floor behind the pilot's seat. Following the usual Avro practice, the side fairings of this part of the fuselage are built up of spruce and three-ply, in complete frames, which are easily detachable, thus readily exposing all control rods and wires, which are led out- side the actual fuselage frame, when desired, leaving the inside of the cockpit ab- solutely clean. The front cowling panels just abaft the engine are aluminium, well shaped to work in harmony with the engine cowling and keep the drag of this large-sized fuselage as low as possible. The engine cowling itself will be of the Townend ring type, which should contri- bute a great deal to the high performance.
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