Sikorsky S-67
| Sikorsky S-67 Blackhawk | |
|---|---|
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|
|
| Type: | Attack helicopter |
| Design country: | |
| Manufacturer: | |
| First flight: |
20th August 1970 |
| Commissioning: |
Flight tests canceled in 1974 |
| Production time: |
no series production |
| Number of pieces: |
1 |
The Sikorsky S-67 Blackhawk was an attack helicopter that Sikorsky developed independently. It is not to be confused with the Sikorsky UH-60 Black Hawk .
history
In 1964, the US Army announced the development of a combat helicopter ( Advanced Aerial Fire Support System ). Then Bell developed the Model 209 (later military name : Bell AH-1 ), Lockheed the AH-56 Cheyenne and Sikorsky the S-66 . The S-66 had the property of being able to swivel the tail rotor backwards in fast horizontal flight in order to take over the function of a pusher propeller. However, the competitor from Lockheed emerged as the winner of this tender.
Nevertheless, those in charge at Sikorsky pushed ahead with the further development of a combat helicopter. Based on the S-66 and with components from the Sikorsky S-61 , the S-67 Blackhawk was constructed . It had the typical characteristics of a combat helicopter, but the stub wings were not purely a weapon carrier, but were supposed to relieve the main rotor as "real" wings in fast horizontal flight. In contrast to the previous S-66, the tail rotor was not designed to pivot.
The prototype made its maiden flight on August 20, 1970 , followed by extensive test series until the mid-1970s. On December 14, 1970, the S-67 set a world speed record (348.971 km / h), and the next five days later (355.485 km / h). Despite these achievements and the basic usability, the Blackhawk could not compete with other attack helicopters. When on September 1, 1974 the prototype at the Farnborough International Airshow in Farnborough shattered due to a pilot's error on the ground, the program was discontinued.
Technical specifications
| Parameter | Data |
|---|---|
| Construction year | 1970 |
| Manufacturer | Sikorsky |
| Rotor diameter | 18.90 m |
| Hull length | 19.56 m |
| Length over all | 22.58 m |
| height | 5.59 m |
| Preparation mass | 5,681 kg |
| Takeoff mass | 11,067 kg |
| crew | 2 |
| Top speed | 335 km / h |
|
Hovering altitude without ground effect |
1,980 m |
| Range | 354 km |
| Payload | 6 fully equipped soldiers 4,312 kg weapon load |
| Engine | 2 × General Electric T58 GE-5- shaft turbines with 1,103 kW (1,500 PS) each |
See also
literature
- Sikorsky S-67 Blackhawk (Airdata File) . In: AIR Enthusiast December 1972, p. 319 f.
- Blackhawk's last flight . In: Airplane Monthly June 1976, pp. 310-313
Web links
