Hughes XV-9A Hot-Cycle Rotor V/STOL Research Helicopter Family
The Hughes XV-9A was a 1964 U.S. Army hot-cycle-rotor V/STOL research helicopter. Airframe-mounted gas generators sent hot gas through the rotor system to drive the main rotor without a conventional mechanical transmission, providing a distinctive rotor-wing testbed for high-speed and powered-lift research.
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Identity
- Aliases
- XV-9AHughes XV-9AHot-Cycle RotorHughes Rotor-Wing
- Family Name
- Hughes XV-9A Hot-Cycle Rotor
- Full Name
- Hughes XV-9A Hot-Cycle Rotor V/STOL Research Helicopter Family
- Roles
- militaryresearchexperimentaltechnology_demonstrator
- Status
- retired
- Type
- aircraft
Details
- Aircraft Specs
- Configuration
- rotorcraft
- Operating Modes
- land
- Takeoff Landing Capabilities
- vtol
- Description
- The Hughes XV-9A was a 1964 U.S. Army hot-cycle-rotor V/STOL research helicopter. Airframe-mounted gas generators sent hot gas through the rotor system to drive the main rotor without a conventional mechanical transmission, providing a distinctive rotor-wing testbed for high-speed and powered-lift research.
- First Flight Year
- 1,964
- Manufacturer
- Propulsion Configurations
- Entries
- Count
- 2
- Placement
- fuselage
- Propulsion System
- Role
- main
- Stage
- airframe
- Variant Notes
- NASA's representative XV-9A data identifies two GE YT64 gas generators for the hot-cycle rotor system; the exact YT64 model row is absent, so the canonical GE T64 family is used.
- Name
- XV-9A GE YT64 hot-cycle gas-generator installation
- Notes
- The propulsion relationship represents the airframe gas-generator system; hot gas is routed through the rotor to provide tip-jet drive rather than conventional shaft transmission.
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- Creation Time
- August 15, 2026 at 04:02:15 UTC
- Updated Time
- August 15, 2026 at 04:59:46 UTC