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Republic XF-84H
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Allison XF-40-A-1
1 x 5,850 shp
17,892 lbs.
27,046 lbs.
51'  5"
33' 5"
447 mph
520  mph
5,000 fpm est.
40,000  feet
2,000 miles

Republic XF-84H parked.

The propeller of the Republic XF-84H, even when idling, had a tip speed faster than the speed of sound. They made it one of the loudest aircraft in the world earning it the name "Thunderscreech."

Two of the aircraft were built. The concept was to combine the acceleration of a propeller plane with the top speed of a jet fighter.

The J65 jet engine of the F-84F Thunderstreak was replaced with an Allison XF-40-A-1 turboprop engine. The propeller blades were only about four times longer than wide.

Republic XF-84H aircraft were plagued with excessive drive shaft vibrations. Between July 22, 1955 and Oct 9, 1956 the prototype made twelve flights of which only one was considered successful.

The results of the experiment was a failure.

Republic XF-84 H with wheels down.

We have not been able to find any rc Republic XF-84H RC Airplanes. However if you are willing do a few modifications, K & A Models has a kit for a rc F84F that uses an electric ducted fan for power. Why not just put a motor with a propeller in the nose?

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