Sikorsky XH-59A S-69 Advancing Blade Concept Coaxial Compound Helicopter Family
The Sikorsky XH-59A, also designated S-69, was a two-prototype Advancing Blade Concept compound helicopter family. Its rigid coaxial counter-rotating rotors were designed to retain lift at high advance ratio; after pure-helicopter testing, two Pratt & Whitney J60 turbojets were added for auxiliary forward thrust, enabling a 238-knot high-speed demonstration.
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Identity
- Aliases
- XH-59AS-69Sikorsky S-69Advancing Blade ConceptABC Demonstrator
- Family Name
- Sikorsky XH-59A Advancing Blade Concept
- Full Name
- Sikorsky XH-59A S-69 Advancing Blade Concept Coaxial Compound Helicopter Family
- Roles
- militaryresearchexperimentaltechnology_demonstrator
- Status
- retired
- Type
- aircraft
Details
- Aircraft Specs
- Configuration
- rotorcraft
- Operating Modes
- land
- Takeoff Landing Capabilities
- vtol
- Description
- The Sikorsky XH-59A, also designated S-69, was a two-prototype Advancing Blade Concept compound helicopter family. Its rigid coaxial counter-rotating rotors were designed to retain lift at high advance ratio; after pure-helicopter testing, two Pratt & Whitney J60 turbojets were added for auxiliary forward thrust, enabling a 238-knot high-speed demonstration.
- First Flight Year
- 1,973
- Manufacturer
Links
- Official Url
- https://ntrs.nasa.gov/citations/19810062206
Assets & Meta
- Creation Time
- August 15, 2026 at 04:16:29 UTC
- Updated Time
- August 15, 2026 at 04:16:29 UTC