| XF-84H "Thunderscreech" | |
|---|---|
 XF-84H serial number 51-17060 in flight, with the ram air turbine extended | |
| General information | |
| Type | Experimental fighter |
| National origin | United States |
| Manufacturer | Republic Aviation |
| Primary user | United States Air Force |
| Number built | 2 |
| History | |
| First flight | 22 July 1955 |
| Developed from | Republic F-84F Thunderstreak |
The Republic XF-84H "Thunderscreech" is an American experimental turboprop aircraft derived from the F-84F Thunderstreak. Powered by a turbine engine that was mated to a supersonic propeller, the XF-84H had the potential of setting the unofficial air speed record for propeller-driven aircraft, but was unable to overcome aerodynamic deficiencies and engine reliability problems, resulting in the program's cancellation.[1] Its name, Thunderscreech, is a reference to its extremely loud supersonic propeller.
- ^ Knaack, Marcelle Size. Encyclopedia of U.S. Air Force Aircraft and Missile Systems: Volume 1 Post-World War II Fighters 1945–1973. Washington, D.C.: Office of Air Force History, 1978. ISBN 0-912799-59-5.