Republic XF-84H Thunderscreech
Template:Infobox Aircraft The Republic Aviation Company XF-84H Thunderscreech was an American-built turboprop experimental fighter. Part of the XF-84 series of Aeroplanes, It is unique among them in that it was driven by a supersonic propellor rather than a straight jet engine,
It was powered by an Allison XT-40 jet engine with afterburner
It was the first plane to carry a Ram Air Turbine. This turbine would be automatically swung out into the air stream to provide extra hydraulic and electrical power.
Only two (RS-059 and RS-060) were ever made and only RS-059 flew, logging only 10 hours.
RS-059 (pictured) was retired and spent many years mounted on a pole outside Meadows Field Airport, Bakersfield, California. It is now on show at the USAF Museum
RS-060 (currently unknown)
They were Extremely loud, hence the nickname thunderscreech, and were reportedly audible 35kms away. They were only ever flown by the Republic test pilots, making it possibly the only USAF plane not to be ever flown by a USAF pilot.
It appears in the Guiness book of records as the fastest propellor driven plane ever built, with a design top speed of 670 m/ph, it is unofficailly reported to have reached 623 m/ph.