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YAKOVLEV
YAKOVLEV
YAK-24 |
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Cuando a finales de 1951 se inició el desarrollo del voluminoso helicóptero de transporte YAK-24, el equipo de proyectos de Yakovlev tenía muy poca experiencia en aparatos de alas rotativas, pues su anterior desarrollo se limitaba al prototipo coaxial EG de 1947 y al YAK-100 de 1949, ninguno de los cuales logró pasar de una etapa experimental. Se encontraron considerables dificultades, pero tras un amplio y cuidadoso proceso de evaluación en tierra, el cuarto prototipo comenzó sus vuelos cautivos a partir del 3 de julio de 1952. Tras completarse las evaluaciones oficiales en prototipos posteriores, la producción de este modelo comenzó en abril de 1955 y al cabo de cuatro meses los demostradores fueron exhibidos públicamente durante el Día de la Aviación Sovietica. Se construyeron por lo menos 100 ejemplares de este helicóptero birrotor, cuyo amplio fuselaje acomodaba a tres tripulantes y hasta 30 infantes equipados, ó 18 camillas ó hasta 3000 Kg. de carga. El YAK-24U que se elevó por primera vez en diciembre de 1957, presentaba varias mejoras y fue puesto en producción a partir de 1959, entregándose unos 50 ejemplares; esta versión podía llevar 40 infantes equipados o hasta 3500 Kg. de carga. El modelo civil YAK-24 A de 1960 acomodaba 30 pasajeros, en tanto que el YAK-24B fue un transporte VIP, con el fuselaje acortado y capacidad para un total de hasta nueve pasajeros. |
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After having designed an experimental helicopter with coaxial rotors and the Yak-100 between 1944 and 1947, the Yakovlev design bureau embarked at the beginning of the fifties on the development of a heavy twin-engine helicopter with tandem rotors. The first prototype flew on 3 July 1952, with the same rotor blades, transmission and rotor hub as the Mil Mi-4. The four-blade rotor of the prototypes was made of light alloy and covered with fabric, but this was replaced by a steel rotor with a metal skin on the production models. The fuselage was of tubular structure, originally fabric-covered, then with a light alloy skin. There were two big end-plate fins on either side of the rear fuselage. The quadricycle landing gear had fully castoring wheels. The cabin of the Yak-24 could accommodate 20 troops or four staff cars or a similar payload. Final development work on the aircraft was extremely long and complex and full-scale production for the armed forces began in 1955, about 30 months behind schedule. In December of that year, a Yak-24 established a world helicopter record by lifting a 2000kg load to 5082m and 4000kg to 2902m. In 1957, the Yak 24U appeared, with modified rotors, a reinforced structure, more cargo room and provision for carrying slung loads. This version was capable of lifting 3.5 tonnes vertically. Aeroflot (the Russian state airline) evaluated the Yak-24A commercial version for 30 passengers, but turned it down. It also rejected the Yak-24K deluxe version for 8-9 passengers, while the Yak-24P for 39 passengers, with two 1500shp Isotov turbines mounted above the cabin was never built. About 100 of the Yak-24 (NATO reporting name Horse) were built, although some sources put the total at only 40, and it was used exclusively by the Russian Air Force. Its service life seems to have been beset by numerous accidents. G.Apostolo "The Illustrated
Encyclopedia of Helicopters", 1984 |
SPECIFICATION YAK 24 U |
Characteristics |
Information |
Characteristics |
Information |
First Flight Primer Vuelo |
1952 | Engine Motor |
2
Shvetsov |
Seating Capacity Plazas |
3 / 40 |
Power Potencia |
170 HP each |
Empty Weight Peso Vacío |
24250 Lb |
Hover Ceiling
O.G.E. Estacionario O.G.E |
NA |
Maximum
Weight Peso Máximo |
34900 Lb |
Hover Ceiling
I.G.E. Estacionario I.G.E |
NA |
Vel. Cruise Vel. crucero |
80 Kts |
Service
Ceiling Techo de Servicio |
4200 Mt |
V.N.E. V.N.E |
95 Kts |
Maximum
Range (Std) Alcance (Std) |
150 NM |
Dimensions / Dimensiones |
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Fuselage
Length Fuselaje Largo |
70,00 ft |
Main
Rotor Diameter Diam. Rotor Principal |
68,89 ft |
Length,
Rotors Turning Dist. Rotores Girando |
80,05 ft |
Tail
Rotor Diameter Diam. Rotor de Cola |
NA |
Total
Height Alto Total |
22,96 ft |
Price Precio |
NA |
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