yeah, I dunno the horsepower at 74 hg on a Merlin, he is lucky the thing did not blow, but they allowed 75 hg..
The RAF were running many of their Spitfires and Mustangs at 81" hg, so 74" wasn't pushing it much at all.
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yeah, I dunno the horsepower at 74 hg on a Merlin, he is lucky the thing did not blow, but they allowed 75 hg..
The RAF were running many of their Spitfires and Mustangs at 81" hg, so 74" wasn't pushing it much at all.
As for the many Squadrons, I believe it was actually 2 Merlin Spitfire Squadrons and 2 Mustang III Squadrons, which consitutes operational trials at best.
Is it a boost system like MW50 or GM1 or is it the supercharger system?
Well, it was actually the whole of the 2nd TAF, about 30 Spitfire squadrons iirc.
Few people realize the vast majority of RAF fighters were flying on the same performance as they did in early 1943, whereas the USAAF and Luftwaffe fighters gained several hundred horsepowers due to the introduction of higher grade fuels and water injective boosting systems.
Re the USAAF I was under the impression that most of the water based boost systems were for the radial engines not Merlin powered aircraft. As the RAF didn't use Radials in their fighters it wouldn't have been much of a problem.
As for the RAF they did increase the power of the engines via increased boosts but the biggest increase surely was the introduction of the Griffon for the Merlin iro Spitfires.
The Allison V-1710-75 had Water / Alcohol ADI fluid. It made 1425 hp in the P-38K.
The Allison V-1710-89 WER rating of 2300 hp in the P-38H/J with trubosupercharger, 115/145 fuel, and ADI (water / Alcohol).
the -143 Allison made 2250 hp with Bendix fuel injection and ADI in the P-82E/F on 115/145 fuel.
The Bell XP-63H had a turbocompound Allison V-170 of 2980 hp, but never reached production due to the end of the war and the advent of jet engines.
Over 70,000 Allison V-1710s were built and DELIVERED.
The Allison was also one engine used in the Curtiss XP-60. Flight tests showed it to have performance among the best of the piston fighters. Since teh war was winding down, it wasn't produced, but would have given anything in the air using a piston engine a run for its money.
More than 10,000 Allisons used ADI or water/alcohol injection.