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Aviation History
1956
1956 - 1109.PDF
17 August 1956 255 AIRCRAFT INTELLIGENCE 0/ uncommonly good quality are these two pictures of important Russian helicopters—the twin-rotor Yak-24 and the single-rotor Mi-4, both of which were discussed at some length in our issue of August 3. The two machines epitomize Russia's remarkable technical pro- gress in the helicopter field, as in all others. Poland as well as in the U.S.S.R. It is in-tended for miscellaneous civil and military duties, including the towing of heavygliders. The two-spar, all-metal wing is strut-braced and has a full-span leading-edge slot, slotted ailerons and slotted flaps. The forward portion of the rectangularwelded-steel-tube fuselage is metal- covered and the rear part fabric-covered.The pilot is seated to starboard and a passenger to port, and there is a double seatfor two more passengers at the rear. Wire- less equipment is installed at the back ofthe cabin and for freighting or ambulance work the rear seat is removable. Stretchercases can be loaded through a special tri- angular door on the port side. For agricul-tural work a 103-gal chemical tank is fitted in place of the wireless. The engine is a260 h.p. A1-14R nine-cylinder super- charged radial. Principal data: Span,39.37ft; length, 29.52ft; wing area, 236.8 sq ft; weight empty, 2,138.4 lb; weight loaded,3,086 lb. Performance (passenger version): max. speed, 115 m.p.h.; cruising speed,99.4 m.p.h.; landing speed, 43.5 m.p.h.; service ceiling, 13,123ft; normal range, 310miles. U.S.A. Convair £-58. It is announced in Wash-ington that the prototype Convair XB-58 "Hustler" supersonic bomber will begintest flying in about three months. As already reported, the B-58 is a delta-wingmachine powered by four podded General Electric J79 turbojets disposed in anunusual manner and supplemented by liquid-propellant rocket motors developedby Bell. The design speed is in the Mach 1.5 bracket of around 900 to 1,000 m.p.h.This is an unusual regime to choose for a long-range aircraft. The weapons-systemincorporates Blue Goose air-to-ground guided missiles which are launched many" i^ from the target. VICKERS SUPERMARINE N.113 (Two Rolls-Royce Avon) Span 37ft 2in Length SSft 4in Chance Vought Regulus II. Flight testshave already been successfully completed on this supersonic longer-range develop-ment of the familiar U.S. Navy Regulus target and surface-to-surface missile. Pro-duction Regulus Us are being built against a jC4-3m contract and will be used from surface vessels and submarines. France Marcel Dassault Etendard II. The Mar-cel Dassault light ground-attack aircraft formerly known as the Mystere XXII, andnow called Etendard II, made its first flight on July 23. The two turbojets are Tur-bomeca Gabizos, and the undercarriage lias low-pressure tyres, permitting operationfrom rough fields. The designations Etendard IV and VI refer to other lightattack aircraft, meeting French Air Force specifications as well as those of NATO.The Etendard IV first flew on July 24 and is fitted with a S.N.E.C.M.A. Atar turbo-jet. Like the Etendard II it has low- pressure tyres. U.S.S.R. Yak-\2M. The "M" sub-type is a new version of the Yak-12 high-wing liaison aircraft, extensively used in Russia. It has a long fuselage, has been developed from the Yak-12R, and is now in production in
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