HELICÓPTEROS "THE SITE"
BENSEN AIRCRAFT CORPORATION

BENSEN  B8-M / X-25

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A principios de 1950 Igor Bensen, un inmigrante ruso, desarrolló una sorprendente idea de introducir a la gente en la aviación de una manera segura y barata. Su diseño del Gyro-glider y posteriormente el Gyro-copter abrieron un nuevo campo en el mundo de la aviación deportiva.

Igor Bensen tomó contacto con los autogiros en la II Guerra Mundial, cuando dirigía el programa de alas rotativas de la General Electric, la cual desarrolló las palas plásticas para el autogiro Kellett XR-3. Al finalizar la guerra, fue uno de los participantes en las pruebas de uno de los modelos del helicóptero Doblehoff WNF 342, que fue capturado por las fuerzas aliadas en Austria. En 1951 se unió a la compañía Kaman Helicopters hasta 1953 donde formó su propia compañía.

 El primer proyecto de la  Bensen Aircraft Corporation fue un helicóptero que contaba con unas hélices en las palas principales para hacer girar el rotor, como el Nagler-Rolz NR 54 V2. La marina canceló este proyecto, designado B-4. Mientras tanto, Bensen comenzó la construcción de un giro remolcado, el "Gyro-glider", similar al Focke-Achgelis FA 330 pero de construcción mas simple.

El modelo que ahora nos ocupa, el B-8M, voló por primera vez el 6 de diciembre de 1955. El set de planos costaba alrededor de 30 dólares o si uno quería comprar el kit prefabricado debía gastar 995 dólares. El motor costaba entre los 495 a 1200 dólares. El modelo se podía construir  en unas 40 horas de trabajo.

La aeronave tenia una estructura de tubos cuadrados de aluminio con un rotor de dos palas de madera. El control consistía de una palanca simple, un acelerador y los pedales para manejar el estabilizador.

Al igual que el Gyro-Glider, el Gyro-Copter podía guardarse en el garage. Para conveniencia del usuario a partir de 1957 entró en producción una versión automóvil, que podía alcanzar las 35 mph. La fuerza aérea de los Estados Unidos lo designó como X-25 existiendo tres modelos diferentes el A, el B y el DDV.

El B-8M mas conocido fue el Spirit of Kitty Hawk, nombrado así debido a que en el 60 aniversario del vuelo de los hermanos Wright, la aeronave duplicó exactamente el vuelo. Despegó desde el mismo punto, voló a la misma velocidad y cubrió la misma distancia que la aeronave de los Wright.

VERSIONES

Modelo B-8 Super Bug: Versión avanzada del B-8M con dos motores; permitiendo que el rotor gire a mayor velocidad en el despegue, reduciendo la carrera del mismo. 

Modelo B-8HD: Variante del B-8 Super-Bug, con transmisión hidráulica para accionar el rotor.

Modelo B-8W Hydro-Glider: Versión hidroavión del planeador Gyro-Glicer, para ser remolcado por una lancha.

Modelo B-8MH Hover-Gyro: Versión avanzada del B-8M, con capacidad para vuelo estacionario, vuelo hacia atrás y hacia los costados. Esta versión constaba de dos rotores coaxiales, uno superior que gira en forma autónoma, y otro en la posición inferior, con motor separado.

Modelo B-8V Gyro-Copter: Versión equipada con un motor Volkswagen de automóvil.


 In 1953 Igor Bensen, a Russian immigrant to the United States, realized a twenty-five-year-old dream—the establishment of his own aircraft company. Since fleeing to the West during the Russian Revolution, Bensen had patented thirty-six inventions, had participated in early helicopter research for the General Electric Company, had organized and directed the Research Department at Kaman Aircraft Corporation, and had been a test pilot for both the Air Force and the Navy. His new company was formed to develop light, safe rotary-wing aircraft for use by private individuals.

The Gyro-Copter. first flown on December 6. 1955 was a powered version of the Gyro-Glider. It. too. was designed to be constructed from a set of plans. costng about $30. or from a prefabricated kit, costing $995. Engines were available ranging in price from $495 to $1195. As few as forty manhours were required for kit assembly.

The airframe was a square tubular aluminum structure with a single. two-blade rotor of laminatec plywood The controls consisted of a single stick with a twist-grip throttle and toot pedals for the rudder, steering bar and brakes. As with the Gyro Glider spinning and stalling could not occur for autorotation would allow the aircraft to settle gently into a normal landing with no power.

Also like the Gyro-Glider, the Gyro-Copter could be stored in any garage. since it required a space only 5 ½ 6 x 20 feet. For added convenience. the Gyro-Copter Model B-8M. put into production in 1957. was roadable. No equipment had to be changed or removed for the conversion from aircraft to automobile: the blades were simply locked in the fore-and-aft position. On the road it Could reach speeds up to 35 mph Several were Successfully driven on highways and through heavy city traffic during public demonstrations

Besides their use as a pleasure craft Gyro-Copters could be used for terrain and pipeline aerial surveillance and sport and forestry patrol. In England one was modified for crop spraying. All three branches of the military had several in their inventories, and they carried Air Force designation X-25.

The best known of the Gyro-Copters was the Spirit of Kitty Hawk, so named because on the sixtieth anniversary of the Wright brothers historic flight, this aircraft became the first to duplicate exactly the first powered flight. It took off from the same spot. flew at the same speed, and covered the same distance as the Wright aircraft.

Not only did the Spirit of Kitty Hawk make that interesting flight. but in May 1967 and June 1968 it set twelve world and national autogiro speed. distance. and altitude records. Among these were speed over a 100-kilometer closed course (82.5 km/hr.). cross-country distance over a straight line (84 miles in 1 hour. 25 minutes). and maximum altitude (7.200 feet). The aircraft held more records than any other nonmilitary rotary aircraft in the world.

Some of the variants are described here.

Modelo B-8 Super Bug: Advanced version of the B-8M with two engines. This permits higher rotor RPMS during takeoff.

Modelo B-8HD:Variant of the B-8 Super-Bug, with hydraulic transmission to work the rotor.

Modelo B-8W Hydro-Glider:Hydroplane version of the Gyro-Glider, designed to be towed by a boat.

Modelo B-8MH Hover-Gyro: Advanced version of the B-8M, with capacity for stationary flight, I fly back and toward the sides. This version consisted of two coax rotors, one superior that rotates in autonomous form, and another in the inferior position, with separate motor.

Modelo B-8V Gyro-Copter: Version equipped with a Volkswagen automobile engine.



BENSEN B-8 "SUPER BUG"

 


BENSEN B-8 HD

 

Characteristics
Características

Information
Información

Characteristics
Características

Information
Información

First Flight
Primer Vuelo
1955 Engine
Motor

 1 Mc Culloch
4318 E

Seating Capacity
Plazas

1

Power
Potencia

90 HP

Empty Weight
Peso Vacío

 247 Lbs

Hover Ceiling O.G.E.
Estacionario O.G.E

Ft

Maximum Weight
Peso Máximo

500 Lbs

Hover Ceiling I.G.E.
Estacionario I.G.E

Ft

Vel. Cruise
Vel. crucero

40 Kts

Service Ceiling
Techo de Servicio

 Ft

V.N.E.
V.N.E

73 Kts

Maximum Range (Std)
Alcance (Std)

87 NM

 


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