The Republic XF-84H "Thunderscreech" was 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. Its name, Thunderscreech, is a reference to its extremely loud supersonic propeller.
Prototype 51-17059
Prototype 51-17059
Republic XF-84H in the Research & Development Gallery at the National Museum of the U.S. Air Force, Dayton, Ohio.
Republic F-84F Thunderstreak
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The Republic F-84F Thunderstreak was an American swept-wing turbojet-powered fighter-bomber. The RF-84F Thunderflash was a photo reconnaissance version.
YF-84F and YRF-84F prototypes in 1952. Note the early style wing root jet intakes, which were eventually only retained on the RF-84F, due to the need to fit cameras in the nose. The standard F-84F reverted to the original nose intake due to a loss of thrust from the wing root intakes.
RF-84F Thunderflash, the reconnaissance version of the F-84F. Note the unique articulation of the canopy, which is mounted on a pair of hydraulic rams and a lever arm, allowing it to automatically pivot up and backwards behind the cockpit.
Instrument panel in the F-84F cockpit