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Aviation History
1963
1963 - 1314.PDF
Jovoir J2 VTOL aircraft Huskie II This advanced version of the HH-43B Huskie is offered with a Lycoming T53-L-11 engine, transmission stressed for 1,000 h.p., and increased fuel capacity giving a maximum range of 400 miles. K-1125 Huskie III This private venture has HH-43B transmission and major fuse lage assemblies, but is powered by two 500 s.h.p. Boeing YT60 turboshafts, driving intermeshing rotors with glass-fibre blades. The cabin is longer and higher than that of the HH-43B, carrying 12 troops or 3,8001b of freight. An integral rear ramp is equipped with passenger stairs, and other features include an electronics compartment in the "chin pod," and use of a single tail boom, movable tailplane and rudder. Rotor diam, 47ft; fuselage length, 41ft bin; height, 13ft 4in; gross weight, 10,5001b; empty weight, 5,2321b; normal range 390 miles. UH-2A Seasprite Delivery of the Sea- sprite to the US Navy began last December 18, and this high-speed, all-weather heli copter is fast replacing the piston-engined types previously used for utility and rescue. It is powered by a 1,250 s.h.p. General Electric T58-GE-8B, driving a four-blade main rotor, with servo flap controls, and a three-blade tail rotor. The main wheels of its tailwheel-type undercarriage retract. It carries a crew of two and up to 11 passengers, four stretchers or 4,0001b of slung freight. Equipment includes extensive electronic navigation aids, automatic blade tracking, an autostabilization system and a rescue hoist. It can rescue up to 12 adults, and has a flotation hull. Rotor diam, 44ft; fuselage length, 36ft Tin; height, 13ft 6in; normal gross weight, 8,6371b, empty weight, 6.1001b; max speed, 162 m.p.h.; max rate of climb at s.l., /,740ft/ min; hovering ceiling out of ground effect, 4,600ft; max range 620 miles. 140 FLIGHT International, 25 July 1963 Lockheed Aircraft Corporation Burbank, California XH-51A Lockheed-California's CL-595 (Army/Navy XH-51A) is a two-seat heli copter designed to test at high speeds the rigid-rotor system pioneered on the earlier CL-475. Two prototypes have been built, under Army/Navy contract. The first flew early this year and more than 70 flights had been logged by the two XH-51As up to the end of May. Over 160 m.p.h. has already been attained, and autorotations have been demonstrated in forward flight. Powerplant is a 500 s.h.p. United Aircraft of Canada T74 turboshaft. The three-blade main rotor and two-blade tail rotor have Parsons stainless-steel blades, with bonded aluminium honeycomb core. Features of the rotor system include cantilevered blades with freedom in the feathering axis only, a mechanical stabilizing gyro in series between the blades and pilot controls, and an interposed spring cartridge to attain the required mechanical motion and force characteristics. Advantages claimed for the rigid rotor include inherent stability without artificial stabilization, high manoeuvrability, ex tremely wide usable e.g. range, low vibration, ease of control, instrument-flight capability, mechanical simplicity and high speed potential. To explore fully the high speed characteristics, Lockheed set out to achieve minimum aerodynamic drag in the XH-51A; the fully-retractable skid under carriage has reduced overall drag by some 25 per cent, and the rotor plane is set at a forward tilt of 6° relative to the fuselage datum. Rotor diam, 35ft; fuselage length, 3lft9ijn; height, 8ft 2iin; gross weight, 3.5001b; empty weight. 2.1301b; design speed, over 200 m.p.h.; max range, 345 miles. XV-4A Hummingbird Both prototypes of this US Army-sponsored VTOL research aircraft are currently under test. The first began with a conventional take-off and landing on July 7,1962, and then underwent an extensive series of static tests to verify systems operation and prove the principle of augmented-jet ejector lift. It first hovered tethered last November 30, and hovered at maximum VTOL weight on February 11. The second prototype is in NASA's full- scale tunnel at Ames Research Center. Augmented-jet ejector lift was explained in our April 5, 1962, issue. When the pilot wishes to take off vertically he first opens Hughes hot-cycle (artist's impression) doors over and under a large mixing cham ber occupying the whole centre fuselage. He then activates diverter valves in the tailpipes of the two 3,0001b Pratt & Whitney JT12A-3 turbojets, to divert the high- velocity efflux into the chamber and through multiple vertical nozzles. This induces an accompanying flow of free air, and early calculations suggest that the lift might be augmented by as much as 40 per cent, at no cost in extra fuel consumption. Transition to forward flight will be initiated by tilting the aircraft slightly nose- down and accelerating. As wing lift increases, the turbojets will be switched back one at a time to normal horizontal thrust. This will create no asymmetric problems, as each turbojet supplies alternate rows of ejector nozzles. At about 145 m.p.h. both turbojets will be providing forward thrust; the doors then close and the XV-4A becomes a fairly conventional monoplane. Aircraft of this type might be used by the US Army for battlefield surveillance and target acquisition, carrying the necessary equip ment in an under-fuselage pack and arma ment in underwing pods. Span, 25ft / fiin; fuselage length, 33ft 9 in; height, lift lOin: max VTOL weight, 7.2001b; empty weight. 4,9951b; max speed. 520 m.p.h.; max rate of climb at s.l., IS.OOOftlmin; VTOL range, 335 miles, with 3001b payload. Monte-Copter Inc 6805 Perimeter Road South, Boeing Field, Seattle 8, Washington Model 15 Triphibian There has been no news of this three-seat amphibious helicopter since last year's survey. Omega Aircraft Corporation Municipal Airport, New Bedford, Massachusetts BS-12D3S Following a reorganization of the company, a prototype of this latest version was completed in the spring of this year. The original BS-12 flew on December 29, 1956, at which time it was the only genuine crane helicopter in the world. The basic configuration has not changed, the BS-12D3S retaining a steel-tube "backbone," Kaman UH-2A Seasprite Lockheed XH-5IA
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