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Aviation History
1954
1954 - 1713.PDF
762 FLIGHT AUSTER A.0.P.9 . . . taxying lamp and landing lamp. The root of the starboard wing houses die single fuel tank, of 16 Imperial gallons capacity. A flexible bag-type tank by Marston Excelsior, Ltd., it rests on a smooth perforated-sheet floor and has a self-sealing, reinforced bottom and side-walls. The top of the bag is thin and pliable and it is attached to the underside of die tank-bay door, which supports it when die tank isjempry; this door is the only metal-covered part of the wing aft of the spar. The tank can be easily filled from above, and it has a drain through die lower wing surface and a gravity feed to die engine. The contents gauge is mounted on the wall of the tank adjacent to the starboard wing root, and it can thus be read directly in die cockpit, where it is situated just above the forward starboard door. Long range is not normally a requirement of A.O.P. air craft, since such machines are capable of being based on small strips right up in the "front line" and rarely make flights of greater than about 30 minutes duration. Sixteen gallons can keep die A.O.P.9 in die air for nearly two hours and, if neces sary, a corresponding tank can be installed in the port wing, so giving a theoretical range of at least 450 nautical miles. Provision is also made for an auxiliary ferrying tank in the rear fuselage which, with the normal tank in the starboard wing, gives a ferrying range of 520 n.m. Each wing is braced to die fuselage by a single extruded-light-alloy tubular strut, of streamlined section, the upper end of which is attached to a lug riveted to the web of the main spar at about 0.7 semi-span. This is the first Auster design to employ such a spar (vee-struts were formerly used), and the indications are diat both weight and drag are saved as a consequence. The strut is open at both ends to permit rain, and condensation, to run off; near the upper attachment is a bushed picketing-hole. Each wing is attached to the fuselage by two simple fork-ends, which are pinned to lugs welded to the ends of the main cross- tubes in the roof of the cabin. It is a requirement that the wings shall be capable of removal by personnel wearing Arctic gloves (the same consideration applies to other maintenance and over haul procedures), and die roof fittings are therefore designed sb that they can be undone by a small ratchet spanner, which is carried in a pocket on the instrument panel. The provisions for maintenance are really very clever, and will be welcomed by the 9's eventual operators. The simple flap structure comprises a torque tube along the flap leading-edge, to which are riveted Z-section pressed ribs located by a simple trailing-edge member, the whole then being covered with fabric. Each aileron is similar in structure to the wing, with a sheet-metal torsion-box nose section (which houses a mass balance), and a fabric-covered rear portion. The flaps are actuated by a manually operated hydraulic-servo system; a simple up/down selector is incorporated in the jack in the roof of the cabin, and die pump handle is easily worked by the occupant of eidier front seat. Four full strokes gives the maximum 1 2 3 4 5 6 7 8 * 10 Signal pistol Signal cartridge stowage Throttle (plunger-type, push to open) Fuel contents gauge Flap pump and jack unit in roof E.2A compass Console (tail trim, oil-cooling air, Kigass pump, fuel cock, extinguisher) Hydraulic toe-brakes Door-jettison levers Upper portion of windows hinge upward and outward for direct vision 11 Accumulator for radii 12 First-aid and emerger 13 Rigging points 14 Downward-identificat 15 Steering tail-wheel 16 Stiffeners Reduxed to 17 Durestos trim-tab 18 Mass-balance weights 19 Durestos tips 20 Aerial Drogue 21 Flap Torque-tube FAIREY REED AIRSCREW BLACKBURN BOMBARDIER 203 DROOPING AILERONS <
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