Sikorsky S-69
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The Sikorsky S-69 was an experimental compound co-axial helicopter developed as the demonstrator of the Advancing Blade Concept (ABC) under US Army and NASA funding.

The Sikorsky S-69 was an experimental compound co-axial helicopter developed as the demonstrator of the Advancing Blade Concept under US Army and NASA funding.1
earlier Sikorsky S-69 Coaxial-ABC into an autorotative state at an unacceptably high rotational speed. Sikorsky's current experimental X2 TD Coaxial-ABC has the airfoil removed at the root end of the blades.2

Made by Sikorsky Aircraft.

* Sikorsky S-69 - prototype met contraroterende rotors, zonder staart (1972?) * Sikorsky S-70 - UH-60 Black Hawk, SH-60 Sea Hawk (1974) 3
More Users
United States Army
Jet Or Prop
both
Height Alt
4.01 m
Engine(jet)
Pratt & Whitney JT12
Length Alt
12.42 m
Max Takeoff Weight Main
11000
Thrust Main
3000
Power Alt
1360.0
Lists
* List of helicopters
Max Speed Alt
11040.0
Type Of Prop
Turboshaft
More General
2 three-bladed co-axial
Max Speed Main
19320.0
Cruise Speed Main
109
Max Takeoff Weight Alt
9000
Ceiling Main
15000.0
Number Built
2
Crew
2
Thrust Alt
1.35
Cruise Speed Alt
7500.0
Height Main
401.32
Primary user
NASA
Span Alt
10.97 m
Plane Or Copter?
copter
Engine(prop)
Pratt & Whitney Canada PT6T-3 Turbo Twin Pac
Propeller Or Rotor
rotor
Manufacturer
Sikorsky Aircraft
First Flight
1973-07-26
Number Of Jets
2
Span Main
1097.28
Power Main
1
825 hp
Number Of Props
1
Type of jet
turbojet
Length Main
1242.06
Related
* Sikorsky X2
Ceiling Alt
4
570 m
Category
Military helicopters
United States experimental aircraft 1970-1979
VTOL aircraft

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