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Aviation History
1959
1959 - 1419.PDF
692 FLIGHT Doman, LZ-5 Helicopters of the World . . . 20 per cent. For shipping or crating, thefuselage may be readily disassembled into smaller components. The cabin is easilyconverted from cargo to passenger use in a matter of minutes, and there is a verylarge window by each seat. • Rotor diam., 48ft; fuselage length, 38ft;empty weight, 3,250 lb; gross weight, 5,200 lb; max. continuous speed, 100 m.p.h.; speedfor best range, 81 m.p.h.; range (standard tanks), 486 miles. Whippet Depicted on this page is amodel of this forthcoming four-seater which Doman hope to market for $18,500.A cost per seat mile of 6.5 cents is fore- cast, and this is said to be a quarter thatof current small helicopters. Delivery within two years is quoted. The engine isa Lycoming VO-360 of 180 h.p., driving a three-blade main rotor. • Gross weight, 1,940 lb; max. speed, 132m.p.h.; speed for best range, 103 m.p.h.; rate of climb, l,500ft/min; service ceiling, 15,000ft;range (with 15 min reserve), 206 miles. Gyrodyne Co. of America Inc. St. James, Long Island, N.Y. XRON-1 Rotorcycle The makers com- municate the following note on this little helicopter: "The XRON-1 Rotorcycle is a small one-man coaxial helicopter which has been developed under U.S. Navy con- Doman Whippet tract for use by the Marine Corps in mis-sions involving observation, liaison, and small unit tactical maneuvers. This heli-copter has successfully completed a Flight Demonstration Program for the U.S. Navy,and has also been test flown by a number of military pilots. The company is cur-rently engaged in producing a limited quantity of the Rotorcycles for evaluationby the Marine Corps. "The Rotorcycle incorporates two two-bladed coaxial rotors of the semi-rigid (see-saw) type. The blades are of woodenconstruction. The powerplant is the Porsche Model GP-702/1 production-typel,600cc helicopter engine developed by the Porsche Company specifically for the XRON-1. Although the project is strictlymilitary to date, the Company intends eventually to certificate the machine witha view to marketing the civilian version. "During the past year Gyrodyne hasdeveloped an automatic stabilization and remote control system for the Rotorcycle.Many successful test flights have been made with the Rotorcycle in thisconfiguration." • Rotor diam., 17ft; fuselage length, lift;empty weight, 425 lb; gross weight, 690 lb; max. speed at s.l., 69 m.p.h.; cruising speedat s.l., 51 m.p.h.; max. rate of climb, 600ft/min; service ceiling, 6,500ft; normal range, 51 n.m. Hiller Aircraft Corporation Palo Alto, California. 12E In Hiller's 1958 annual report itwas remarked: "With the 1958 launching of the 12E three-place utility helicopterinto the civilian market, a new phase in Hiller aircraft production was begun. The12E signalled the initial step in a long- range programme to increase the ratio ofcommercial to military business." It was further stated: "Power is the answer tothe 12E's exceptional ability. In addition to its Lycoming 305 h.p. engine, the 12Epossesses a rugged H-23D Army-tested airframe which provides the high depend-ability factor essential to safe, profitable operations. The 12E evolved from theH-23D without major redesign cost, since its military counterpart's components wereoriginally engineered to accept more than the 250 h.p. installed. Consequently, assoon as the new Lycoming 305 h.p. engine was available, it was incorporated with onlyminor accessory changes." • Rotor diam., 35ft 6in; fuselage length, 27ft;empty weight, 1,700 lb; gross weight, 2,700 1b; max. speed at s.l., 95 m.p.h.; cruising speedfor max. range, 82 m.p.h.; max. rate of climb, l,520ft/min; hovering ceiling in ground effect,10,100ft; range, 185 miles. H-23D Raven This is the current mili-tary Hiller and has a three-seat dual-con- trol cockpit. The engine is a 250 h.p.Lycoming VO-435, and in comparison with earlier military types the transmission anddrive system have been redesigned. The transmission, it is claimed, has virtuallyinfinite life and is good for over a thousand hours' operation between overhauls. • Rotor diam., 35ft 4in; fuselage length,27ft 8in; weight empty, 1,773 1b; gross weight, 2,700 lb; max. speed at s.l., 95 m.p.h.; cruising Hiller J2E
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