what about the maintenance issues? which one is easier or faster or cheaper?
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WWII Fighter Comparison II Corsair v Mustang.
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I think that AC vs LC engines would be a factor here, the Corsair lacking the additional complexity of a LC engine could simplify maintenance.sigpic"If your plan is for one year, plant rice. If your plan is for ten years, plant trees.
If your plan is for one hundred years, educate children."
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Originally posted by USSWisconsin View PostI think that AC vs LC engines would be a factor here, the Corsair lacking the additional complexity of a LC engine could simplify maintenance.
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Originally posted by zraver View PostPossibly offset but the Corsair needing heavier construction for carrier landings and salt air exsposure. If not more complex, heavier."There is never enough time to do or say all the things that we would wish. The thing is to try to do as much as you can in the time that you have. Remember Scrooge, time is short, and suddenly, you're not there any more." -Ghost of Christmas Present, Scrooge
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The arrester gear would be more work, but a stronger structure shouldn't be - it could be less (less flexing and fatigue). The lack of all that cooling system stuff, pipes, hoses, pumps, radiators, reservoirs - would reduce the number of engine related work significantly, and it would be one less liquid store they would have to maintain in logistics.sigpic"If your plan is for one year, plant rice. If your plan is for ten years, plant trees.
If your plan is for one hundred years, educate children."
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Originally posted by USSWisconsin View PostThe arrester gear would be more work, but a stronger structure shouldn't be - it could be less (less flexing and fatigue). The lack of all that cooling system stuff, pipes, hoses, pumps, radiators, reservoirs - would reduce the number of engine related work significantly, and it would be one less liquid store they would have to maintain in logistics.
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I know I have read of many instances of naval aircraft built at the Bethpage Ironworks with air cooled engines making it home with several cylinders shot away....same with some P-47s.
Pratt & Whittney made some damn good engines.“Loyalty to country ALWAYS. Loyalty to government, when it deserves it.”
Mark Twain
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Originally posted by Albany Rifles View PostI know I have read of many instances of naval aircraft built at the Bethpage Ironworks with air cooled engines making it home with several cylinders shot away....same with some P-47s.
Pratt & Whittney made some damn good engines.
Liquid cooled max end of WWII
P-51H 487mph
Spitfire Mk XIV 465mph (RR Griffon 61 powered 2 stage super charger w/ 150 octane fuel and 25lbs boost)
Radial max end of WWII
TA-152 471mph
P-47N 473mph
F4U-4 445mph
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Originally posted by Albany Rifles View PostI know I have read of many instances of naval aircraft built at the Bethpage Ironworks with air cooled engines making it home with several cylinders shot away....same with some P-47s.
Pratt & Whittney made some damn good engines.
these were partially resolved in the field by covering the joints with ducktape.J'ai en marre.
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Originally posted by Albany Rifles View PostPratt & Whittney made some damn good engines."There is never enough time to do or say all the things that we would wish. The thing is to try to do as much as you can in the time that you have. Remember Scrooge, time is short, and suddenly, you're not there any more." -Ghost of Christmas Present, Scrooge
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Pratt R-2800 engine - these are simply magnificent. Sadly, the big radials are no longer economically viable. At the end of WW2, science had wrung as much power per unit weight out of piston engines as it was possible to do. Then along comes the gas turbine that turned the engine world on its head, delivering VAST power per unit weight, and completely destroying the big radials as viable powerplants.
The power of a Rolls-Royce Trent gas turbine (B-777) is almost inconceivable. 100,000 pounds of thrust.
Cooling was always a problem, but as Z mentioned, the highly-researched NACA cowlings ended up completely negating any drag penalty from the frontal area, much like the P-51 radiator actually turns the waste heat into measurable forward thrust.
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Originally posted by Chogy View Post
Pratt R-2800 engine - these are simply magnificent. Sadly, the big radials are no longer economically viable. At the end of WW2, science had wrung as much power per unit weight out of piston engines as it was possible to do. Then along comes the gas turbine that turned the engine world on its head, delivering VAST power per unit weight, and completely destroying the big radials as viable powerplants.
The power of a Rolls-Royce Trent gas turbine (B-777) is almost inconceivable. 100,000 pounds of thrust.
Cooling was always a problem, but as Z mentioned, the highly-researched NACA cowlings ended up completely negating any drag penalty from the frontal area, much like the P-51 radiator actually turns the waste heat into measurable forward thrust.
"There is never enough time to do or say all the things that we would wish. The thing is to try to do as much as you can in the time that you have. Remember Scrooge, time is short, and suddenly, you're not there any more." -Ghost of Christmas Present, Scrooge
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We had a couple of the R-2800's at the UW Madison, one was a cutaway, I wish I had some pictures, but a favorite distraction of mine was studying that cutaway - I can still remember the giant "4 barrel" carburetor (similar to the black one in the upper left hand corner of the lower picture above)- even more impressive when you looked at the cars they built during that period, these engines were amazing.
for contrast - here is the liguid cooled engine the P-51 was designed with, the Allison V-1710 (1710 cid, the P-38, P-39 and P-40 also used it)
http://www.flightglobal.com/pdfarchi...0-%201383.html this describes the Allison in detail
the Rolls Royce Merlin (1647 cid) was very similar, but had a two stage, intercooled, supercharger, making it better at altitude and more heavily boosted (AND it was strong enough to take it).
ROLLS ROYCE MERLIN ENGINELast edited by USSWisconsin; 24 Mar 11,, 17:46.sigpic"If your plan is for one year, plant rice. If your plan is for ten years, plant trees.
If your plan is for one hundred years, educate children."
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