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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
    • Nested value
    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