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Aviation History
1958
1958 - 0882.PDF
900 FLIGHT, 27 June 1958 NAPIER Aero-Engines The Eland in section, by "Flight" artist R. E. Poulton. temperatures. Air-cooled turbine blading. Take-off power 4,000e.h.p. NEIJ: A development of the NE1.4, with increased mass flow and raised compression ratio (8:1). Take-off power 4,200e.h.p. Originally intended for the Westland Westminster. NE1.6: The latest "fixed-wing" Eland, with improved turbine blades, per-mitting higher operating temperatures, and increased mass flow. 3,500 e.h.p. at 12,500 r.p.m. Eland 229: This is the engine for theWestland Westminster, with rear drive and an hydraulic clutch similar to that fitted to the NE1.3. Rating 2,800 s.h.p. Installations—Great Britain: Airspeed Ambassador (test-bed).Fairey Rotodyne. Vickers-Armstrongs Varsity (test-bed). West- iand Westminster. Eland-Convair (Model 340-2 Convairliner).West Germany: Hamburger HFB-C-209. N.B. The Eland will also be installed in the Canadair CL-66 (Canadair 540), and designstudies are in hand for the conversion of various Convair, Lock- heed and Douglas airframes. 1» GAZELLE DESIGNED from the outset as an omni-angle engine for heli-copter propulsion. A free-turbine shaft-drive engine, with eleven- stage compressor, six combustion chambers, two-stage compressorturbine and single-stage power turbine. Variants—NGa.l: A development Gazelle haying an emergencyrating of 1,260 s.h.p. NGa.2: This is the engine for the Bristol Type 192 helicopter and has an emergency rating of 1,650 h.p. Inthe Type 192 the engine is installed at an angle 7 deg from the vertical. NGa.3: The emergency rating increased to 1,800 s.h.p.(5 min) at 20,400 compressor r.p.m. NGa.4: a development engine having an emergency rating of 2,000 s.h.p. NGa.l3: This isessentially the NGa.3. The addition of the figure 1 before the 3 indicates that the engine output-shaft turns in a direction contraryto that of the original Gazelle, this change having been made merely by providing "mirror-image" blading on the power turbine.The NGa.13 is the engine for the Westland Wessex. Installations—Bristol Type 192. Westland Wessex. GAZELLE JUNIOR A SMALLER version of the Gazelle, now under development.Napier will also offer this as a coupled engine, so that the larger type of single-engined helicopters may be converted to twin con-figuration. The initial engine will have a sea-level static maximum rating of 920 s.h.p., which will be increased, with development, to1,070 s.h.p. Basic weight, 495 lb. ."""* SCORPION A LIQUID propellant rocket using high test peroxide andkerosine. Produced in twin-chamber form as the Double Scorpion. Variants—NSc.l: A development engine air-tested in an EnglishElectric Canberra. NScD.l: Development model of the Double Scorpion, also installed in a Canberra. Intended for ultimateinstallation in belly fairing on the English Electric P.I fighter. OTHER NAPIER ROCKETS FOR several years Napier have been engaged in developing rocketmotors not only for aircraft, but for missile and other applications, e.g., the NRE 11, 17 and 19. The last-named is one of severalminiature rockets and has been used—in an "ROR" installation— for increasing the rate of climb of the Saunders-Roe Skeeterhelicopter. RAMJETS SINCE 1950 Napier have been major sub-contractors to theNational Gas Turbine Establishment in the design and manufac- ture of supersonic ramjet vehicles. The RJTV (ramjet test vehicle)which, it was announced last January, had reached Mach 2.3 and had coasted to 114,000ft, was one of a large number built at thecompany's Flight Development Establishment at Luton, Beds. It had a double-shock intake with a conical centre-body. Itmeasured 20ft in length and was 18in in diameter. Ramjet test vehicle. Double Scorpion.
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