Griffon vs Merlin rotation.
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..
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..
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.
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?
The gearing between crankshaft and camshafts reverses, not to reverse the direction of rotation of the camshafts, but to preserve the direction of rotation of the camshafts while reversing the crankshaft rotation. The camshafts turn the same direction regardless of the direction the prop turns.
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?
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
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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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.
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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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!
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!
