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The '''Sikorsky S-69''' was an experimental compound co-axial [[helicopter]] developed by [[Sikorsky Aircraft Corporation|Sikorsky]]. |
The '''Sikorsky S-69''' was an experimental compound co-axial [[helicopter]] developed by [[Sikorsky Aircraft Corporation|Sikorsky]]. |
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Revision as of 18:22, 18 May 2007
The Sikorsky S-69 was an experimental compound co-axial helicopter developed by Sikorsky.
Sikorsky S-69
Also known by the military designation XH-59A, the S-69 was part of the Advancing Blade Concept (ABC) program.[1] This Advancing Blade Concept system consisted of two rigid, contra-rotating rotors which made use of the aerodynamic lift of the advancing blades. At high speeds, the retreating blades were offloaded, as most of the load was supported by the advancing blades of both rotors and the penalty due to stall of the retreating blade was thus eliminated. This system did not even require a wing to be fitted for high speeds and to improve manoeuvrability, and also eliminated the need for an anti-torque rotor at the tail.[2]
Sikorsky X2
Sikorsky will also incorporate decades of company research and development into X2 Technology helicopters, including: the XH-59A Advancing Blade Concept Demonstrator which showed high speed was possible with a coaxial helicopter and auxiliary propulsion, the Cypher UAV which expanded company knowledge of the unique aspects of flight control laws in a fly by wire aircraft that employed coaxial rotors and the RAH-66 Comanche, which developed expertise in composite rotors and advanced transmission design.[3]
Specifications (S-69)
Data from Avia.Russian.ee Website[2]
General characteristics
- Crew: 2
Performance
References
- ^ Michael J Taylor: The Illustrated Encyclopedia of Helicopters, page 20. Exeter Books, New York, NY USA, 1984. ISBN 0-671-07149-1
- ^ a b "Sikorsky S-69 / XH-59 1972". Retrieved 2006-12-8.
{{cite web}}
: Check date values in:|accessdate=
(help) - ^ http://www.sikorsky.com/details/0,3036,CLI1_DIV69_ETI2088,00.html
External links
Related content
Related development
Aircraft of comparable role, configuration, and era
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