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[FREE DOWNLOAD] NO 3. Government Design & Development. H.M. Government and by commercial operators help to develop and finance the ever growing aviation industry. The R.A.F. and the Royal Navy contribute directly too.


NO 3. H.M. Government and by commercial operators help to develop and finance the ever growing aviation industry. The R.A.F. and the Royal Navy contribute directly too.

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Hunting submarines and sea patrol – those are the duties of the new Short Seamew aircraft for the Royal Nary. It is airborne after a short take-off from the deck of an aircraft-carrier, can conduct a radar search and low- level attack, and land back in safety due to its slow approach.

The Seamew has been produced at low cost, is simple to maintain and is very robust for rough handling. It is shown here descended on the lift of H.M.S. Eagle with its wings folded back. The Armstrong Siddeley Mamba 6 turboprop engine gives it a maximum level speed of 211 knots. Length: 41 ft. Span: 55 ft. Span with wings folded: 23 ft.

KEY TO FEATURES (1) Pilot. (2) Navigator and Radar-operator. (3) Sliding cockpit canopies. (4) Koor-bladed Rotor airscrew. (5) Air inlet to Armstrong Siddeley Mamba 6 turboprop engine; 1.500 h.p., plus 300-poand static thrust. (6) Air compres­sor. (7) Oil tank. (8) Accessory gearbox. (9) Jet pipe. (10) Jet exhaust. (11) Wing locking-pin. (12) Position of star­board wing when extended. (13) Wing folding arm and hydraulic jack. The large radar scanner can just be seen below. (14) Aileron control swivel joint. (15) Fixed main undercarriage with brakes. (16) Wing slat. (IT) De-icing strip. (18) Outer wing flap. (19) Aileron trim tab. (20) Starboard aileron. (21) Aileron control rod. (22) Bomb doors open. A variety of anti-submarine weapons are car­ried. (23) Port wing folded. (24) Rudder and elevator rods. (25) Arrester-hook control. (26) Tail wheel and brakes. (27) Rudder and elevator controls. (28) Fin and tail-plane de-icing strips. (29) Uppcr rudder. (30) Starboard elevator and trim tab. (31) Lower rudder. (32) Arrester-hook; this is lowered when landing, and engages with wires stretched across the aircraft-carrier’s deck.

Eagle 29 April 1955


(1) Accumulator and electrical services. (2) Double nosewheel retracted. (The main wheels have been omitted for clarity, but it Is quite probable that a tandem unit will be fitted as on the Valiant.) (3) Control Cabin. (4) Intakes to Napier Oryx (Gat generator or producer) engine. (5) Passengers’ compartment. (6) Main entrance and stewardess position. (7) Passengers’ luggage. (8) Refrigerator plant. (9) Toilet. (10) Napier Oryx engine. (11) Airscrew. (12) Refrigerator room. (13) Cargo stowage compartment. (I4) H. Percival P.87 shown in B.E.A. colours. (15) The Douglas D. C. 3 Dakota shown in K.I..NJ. (Royal Dutch Airlines) livery.


  • Ancillary equipment. Generator, starter motor, etc. (B) Air enters engine through this intake. (C) Gus take-off pipes. (D) Five combustion chambers with bracing tubing.



The Oryx’s function is to supply a steady flow of hot gas, at a relatively low pressure, to a power-producing section remote from the Oryx itself, to a chamber, and then to propulsive airscrews, the jet being exhausted at the airscrew paddle blade tips. The principle is that the reaction-of the gas at the tips will drive the airscrew round, much in the same way as the tip jet helicopter. The inset drawing illustrates (he main features of this remarkable little engine, and it will be seen that air enters in at B; an axial compressor is employed – possibly the smallest one ever employed on :in aero-engine. The air passes to the five chambers, around which can be seen bracing tubes.

This engine is naturally quite revolutionary and very little has been disclosed about it, purely because of Its experimental state. Originally designed as a helicopter power unit, the 750 h.p. would seem to tic the Oryx to a variety of aircraft types, some of which are already flying with much heavier piston engines.