The Griffon was developed at the request of the Fleet Air Arm.
War time aircraft that used the engine were various marks of the Naval Firefly and various marks of Spitfire, Seafire, Spiteful, Seafang, and sole MB.5. The Griffon Spitfire was the result of needing an aircraft to combat the appearance of the FW 190. Highest rated engine was the 101/121/130 version with two stage three speed supercharger installed in the Spiteful and Seafang, 2420 HP, 101 was single prop, the others contrarotating. Rolls Royce had a project called the FTB (Flying Test Bed) which was built up primarily of P-51 components with the Griffon mounted behind the pilot as with the P-39. Mock up only built as the war ended and jets were seen as the way forward.. https://cimg2.ibsrv.net/gimg/pprune....0b8423d823.jpg |
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IIRC it was built up from one Mustang that got the tail chewed off and another that was dropped whilst being offloaded from a ship in Liverpool Docks. Eric Clutton wrote about it.
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RE post #57 with the gear drive drawings, reversing the direction of rotation with the same camshafts would imply that the cam ramps were symmetrical on lift and return. Is this the case?
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Originally Posted by Winemaker
(Post 10679677)
RE post #57 with the gear drive drawings, reversing the direction of rotation with the same camshafts would imply that the cam ramps were symmetrical on lift and return. Is this the case?
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Originally Posted by megan
(Post 10678851)
Rolls Royce had a project called the FTB (Flying Test Bed) which was built up primarily of P-51 components with the Griffon mounted behind the pilot as with the P-39. Mock up only built as the war ended and jets were seen as the way forward..
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The mockup was built up from components of AL960, AM148, and AM245. The first flight prototype was planned to have the tail surfaces of the Tempest. Remedial effort effort for the destabilisation effects of the additional power?
https://cimg0.ibsrv.net/gimg/pprune....751441035d.jpg |
I just saw a documentary about the P38 confirming the three aircraft delivered to the RAF lacked superchargers and the contra rotating props of the American aircraft
Consequently their performance suffered greatly and they were rejected |
stilton ,the P-38 had counter-rotating props,not contra-rotating,which applies to props from one engine,ie Griffon.
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Re the FTB P-51; wouldn't moving the engine back like that cause major c.g. problems? That's a huge hunk of iron to move back eight feet or so.
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From memory, Eric 'Winkle' Brown has said in one of his books that the later marks of Mosquito DID have the two props rotating in opposite directions from each other, but that this was achieved by different gearing, rather than different engine rotations. This, he said, made the Mosquito one of his favourite wartime aircraft.
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Originally Posted by pettinger93
(Post 10702299)
From memory, Eric 'Winkle' Brown has said in one of his books that the later marks of Mosquito DID have the two props rotating in opposite directions from each other, but that this was achieved by different gearing, rather than different engine rotations. This, he said, made the Mosquito one of his favourite wartime aircraft.
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Originally Posted by DaveReidUK
(Post 10702309)
I think there's confusion by him (or possibly you) between the Mosquito, which didn't have C/R props in any marks and the Hornet/Sea Hornet, which did.
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DaveReid: further : a quick search of wikipedia shows that Mosquito marks 32 and 34 PR models were powered by a Merlin 113 on one side and a 114 on the other. By searching for 'merlin 113 / 114' found a photo on another site that showed a photo of a mosquito with props with opposite pitch. But this is all very pedantic!
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Unless Mr Brown was referring to the Hornet by mistake? (or my memory is failing even more than I thought) But I will shut up now.
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Originally Posted by pettinger93
(Post 10702396)
DaveReid: further : a quick search of wikipedia shows that Mosquito marks 32 and 34 PR models were powered by a Merlin 113 on one side and a 114 on the other.
By searching for 'merlin 113 / 114' found a photo on another site that showed a photo of a mosquito with props with opposite pitch. But this is all very pedantic! |
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