Aircraft Identification Thread III

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Republic XF-84H. Only 2 were made.

Two XF-84H's were built. Their concept was to com- bine the acceleration of a propeller plane with the top speed of a jet fighter. The single J35 jet engine of the F-84 Thunderchief was replaced with two Allison T38 jet engines mated through a single gear box to a prop- eller. The propeller's blades were only about four times longer than wide. The result was a failure. The XF-84H was plagued with excessive drive shaft vibrations. At idle the propeller tip speed was faster than the speed of sound making the XF-84H the loudest airplane in the world.
http://www.aviationtrivia.homestead.com/XF84H.html
 

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Yeah, you're right XF-84H

The Thunderjet was so loud that it could be easily heard about 35 kilometres away. On one occasion, they powered up the engines of the XF-84H on a runway, while what they thought was an empty C-47 transport plane was parked on a nearby runway. This C-47 was side-on to the propeller of the XF-84H, where the noise was loudest. When they shut down the engine, they heard banging noises from the C-47. An engineer had been doing maintenance inside, and the incredibly loud banshee-like noise had thrown him into an epileptic fit. The banging noise was the flailing of his limbs. And yes, he did recover after a few days.
http://www.abc.net.au/science/k2/moments/s934718.htm

Sounds produced by the aircraft's turboprop engine--actually, it was the propeller--caused nausea and headaches among ground crews, earning the XF-84H the unofficial nicknames "Thunderscreech" or "Thundershriek" because of the intolerable sound made by the sonic booms from the propeller, which made it basically unusable. The propeller blades went supersonic even while the airplane was running up on the ground. This was definitely the noisiest single-engine aircraft ever to fly. It wasn't just the volume, and it wasn't sound as we think of it, but shock waves, which are typified by a nearly instantaneous pressure increase. A person standing some distance from the airplane was subjected to rapid fire shock waves. These shock waves acted directly on the large intestine, causing spasms that caused individuals in too-close proximity to soil their pants. Hearing protection made no difference.
http://www.ipilot.com/aircraft/protect/feature.asp?ArticleID=745

And heres the sound it made
http://www.aviationtrivia.homestead.com/XF84H.html
 
Yep, thats the one, I circled the unit, but I see he put a moving map in the aircraft, from what I remember there used to be a large artifical horizon there. One would say that the GPS takes away from the "originality" of this aircraft, personally if you're going to fly the thing you want some good nav equipment!

Oh - I see he also put a transponder in it as well!
 

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