Author Topic: P47M performance ...  (Read 1052 times)

Offline RTHolmes

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P47M performance ...
« on: November 25, 2009, 10:53:07 AM »
... seems very strong. is it modelled using 150 avgas?

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Offline Strip

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Re: P47M performance ...
« Reply #1 on: November 25, 2009, 11:07:45 AM »
lol

P-47M has the same engine as the N model with D40 weight, it should feel strong.

(AFAIK)

Offline BnZs

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Re: P47M performance ...
« Reply #2 on: November 25, 2009, 11:23:29 AM »
At typical MA altitudes performance is roughly the same as a P-51D...for five minutes, at which point it becomes roughly the same as well...a Jug.

M performance is not too far ahead of what P-47Ds were already doing with 150 octane when the M arrived however.
"Crikey, sir. I'm looking forward to today. Up diddly up, down diddly down, whoops, poop, twiddly dee - decent scrap with the fiendish Red Baron - bit of a jolly old crash landing behind enemy lines - capture, torture, escape, and then back home in time for tea and medals."

Offline Widewing

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Re: P47M performance ...
« Reply #3 on: November 25, 2009, 04:28:57 PM »
At typical MA altitudes performance is roughly the same as a P-51D...for five minutes, at which point it becomes roughly the same as well...a Jug.

M performance is not too far ahead of what P-47Ds were already doing with 150 octane when the M arrived however.

July 24, 1944, 70" MAP was cleared for use by Jugs with the B series R-2800. When tested at 70", it translated into 444 mph @ 23,200 feet. The test aircraft was a P-47D-22-RE Razorback. More powerful B series engines in later D models may have resulted in a bit more speed.


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Widewing
My regards,

Widewing

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Offline BnZs

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Re: P47M performance ...
« Reply #4 on: November 26, 2009, 09:43:54 PM »
July 24, 1944, 70" MAP was cleared for use by Jugs with the B series R-2800. When tested at 70", it translated into 444 mph @ 23,200 feet. The test aircraft was a P-47D-22-RE Razorback. More powerful B series engines in later D models may have resulted in a bit more speed.

(Image removed from quote.)
Courtesy of Mike Williams and Neil Sterling


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Widewing

Huh...just eyeballing those figures seem to be within 10mph of what is listed for the 47M between 10 and 23K, although the M is significantly faster right on the deck in-game. Interesting.
"Crikey, sir. I'm looking forward to today. Up diddly up, down diddly down, whoops, poop, twiddly dee - decent scrap with the fiendish Red Baron - bit of a jolly old crash landing behind enemy lines - capture, torture, escape, and then back home in time for tea and medals."

Offline Widewing

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Re: P47M performance ...
« Reply #5 on: November 27, 2009, 12:36:26 AM »
Huh...just eyeballing those figures seem to be within 10mph of what is listed for the 47M between 10 and 23K, although the M is significantly faster right on the deck in-game. Interesting.

What I also found interesting was a note associated with the original charts for the P-47D-10...
"Climb performance of Curtiss 836-2C2-18 propeller and Hamilton Standard 6507A-2 propeller was nearly identical, the difference between the two being within the limits of experimental accuracy. A definite difference of performance in level flight high speeds was found, with the Hamilton Standard propeller giving from five to eight miles per hour faster speeds throughout the altitude tested."


My regards,

Widewing
My regards,

Widewing

YGBSM. Retired Member of Aces High Trainer Corps, Past President of the DFC, retired from flying as Tredlite.

Offline Badboy

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Re: P47M performance ...
« Reply #6 on: November 27, 2009, 07:09:04 AM »
What I also found interesting was a note associated with the original charts for the P-47D-10...
"Climb performance of Curtiss 836-2C2-18 propeller and Hamilton Standard 6507A-2 propeller was nearly identical, the difference between the two being within the limits of experimental accuracy. A definite difference of performance in level flight high speeds was found, with the Hamilton Standard propeller giving from five to eight miles per hour faster speeds throughout the altitude tested."

That sounds like the pitch range of the Hamilton Standard was slighter better at the high speed end by perhaps just a degree or two, giving slightly better top speed performance. When they were both operating well within the pitch range limits, i.e during a climb, they were similar.

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