Kellett KD-1
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Kellett KD-1
Le Kellett KD-1 sur Wikipedia.en
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The Kellett KD-1 was a 1930s [Vous devez être inscrit et connecté pour voir ce lien] built by the [Vous devez être inscrit et connecté pour voir ce lien].
It had the distinction of being the first practical rotary-wing aircraft used by the United States Army and inaugurated the first scheduled air-mail service using a rotary-wing aircraft.
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The Kellett KD-1 was a 1930s [Vous devez être inscrit et connecté pour voir ce lien] built by the [Vous devez être inscrit et connecté pour voir ce lien].
It had the distinction of being the first practical rotary-wing aircraft used by the United States Army and inaugurated the first scheduled air-mail service using a rotary-wing aircraft.
Lorsen- CLUB
- Messages : 1039
Re: Kellett KD-1
Development
Using the experience gained in building [Vous devez être inscrit et connecté pour voir ce lien] autogyros under licence the Kellett Autogiro Company developed the KD-1 which was similar to the contemporary [Vous devez être inscrit et connecté pour voir ce lien].
It had two open cockpits, a fixed tailwheel landing gear and was powered by a 225hp (168kW) Jacobs L-4 radial engine.
After testing of the prototype a commercial variant designated the KD-1A was put into production.
Using the experience gained in building [Vous devez être inscrit et connecté pour voir ce lien] autogyros under licence the Kellett Autogiro Company developed the KD-1 which was similar to the contemporary [Vous devez être inscrit et connecté pour voir ce lien].
It had two open cockpits, a fixed tailwheel landing gear and was powered by a 225hp (168kW) Jacobs L-4 radial engine.
After testing of the prototype a commercial variant designated the KD-1A was put into production.
Lorsen- CLUB
- Messages : 1039
Re: Kellett KD-1
The KD-1A had a three-bladed rotor with folding blades and a number of minor detail improvements.
A KD-1B which was a KD-1A with an enclosed cockpit for the pilot was operated by Eastern Airlines and inaugurated
the first scheduled rotary-wing air-mail service on 6 July 1939.
A KD-1B which was a KD-1A with an enclosed cockpit for the pilot was operated by Eastern Airlines and inaugurated
the first scheduled rotary-wing air-mail service on 6 July 1939.
Lorsen- CLUB
- Messages : 1039
Re: Kellett KD-1
In 1935 the United States Army bought a KD-1 for evaluation and designated it the YG-1, a second aircraft followed which had additional radio equipment and was designated the YG-1A.
These two aircraft were followed by a batch of seven designated YG-1B.
In 1942 seven more were bought for use in the observation role as the XO-60.
Six XO-60s were re-engined with 300hp (224kW) [Vous devez être inscrit et connecté pour voir ce lien]-3s and re-designated YO-60.
These two aircraft were followed by a batch of seven designated YG-1B.
In 1942 seven more were bought for use in the observation role as the XO-60.
Six XO-60s were re-engined with 300hp (224kW) [Vous devez être inscrit et connecté pour voir ce lien]-3s and re-designated YO-60.
Lorsen- CLUB
- Messages : 1039
Re: Kellett KD-1
One YG-1B was modified with a constant-speed rotor and was re-designated the YG-1C, it was later re-engined with the more powerful R-915 and re-designated again as the XR-2.
The XR-2 was destroyed by rotor ground resonance problems and the evaluation was continued with another modified YG-1B designated the XR-3.
The XR-2 was destroyed by rotor ground resonance problems and the evaluation was continued with another modified YG-1B designated the XR-3.
Lorsen- CLUB
- Messages : 1039
Lorsen- CLUB
- Messages : 1039
Re: Kellett KD-1
YG-1
United States Army designation for one KD-1A acquired for evaluation.
YG-1A
One aircraft as YG-1 with the addition of radio equipment.
YG-1B
Production aircraft for the United States Army, seven built.
YG-1C
One YG-1B modified with a constant-speed rotor for evaluation, later designated the XR-2.
United States Army designation for one KD-1A acquired for evaluation.
YG-1A
One aircraft as YG-1 with the addition of radio equipment.
YG-1B
Production aircraft for the United States Army, seven built.
YG-1C
One YG-1B modified with a constant-speed rotor for evaluation, later designated the XR-2.
Lorsen- CLUB
- Messages : 1039
Re: Kellett KD-1
XO-60
Production aircraft for the United States Army with a 225hp (168kW) [Vous devez être inscrit et connecté pour voir ce lien] radial engine, seven built.
YO-60
Six XO-60s re-engined with a 300hp (224kW) Jacob R-915-3 radial engine.
XR-2
The YG-1C re-designated after being re-engined with a 300hp (224kW) [Vous devez être inscrit et connecté pour voir ce lien] radial engine.
XR-3
One YG-1B modifed to XR-2 standard for evaluation.
Production aircraft for the United States Army with a 225hp (168kW) [Vous devez être inscrit et connecté pour voir ce lien] radial engine, seven built.
YO-60
Six XO-60s re-engined with a 300hp (224kW) Jacob R-915-3 radial engine.
XR-2
The YG-1C re-designated after being re-engined with a 300hp (224kW) [Vous devez être inscrit et connecté pour voir ce lien] radial engine.
XR-3
One YG-1B modifed to XR-2 standard for evaluation.
Lorsen- CLUB
- Messages : 1039
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