Aces High Bulletin Board

Help and Support Forums => Aces High Bug Reports => Topic started by: nick172 on February 19, 2013, 12:59:34 PM

Title: p-47-11 GPH
Post by: nick172 on February 19, 2013, 12:59:34 PM

The P-47-11 GPH stays at 550 from the deck up through 29k It never wavers.  I'm sure that the higher the plane climbs, the less fuel it should be using. Take my Cherokee 6 up and I get better fuel burn at alt.

Nick

Title: Re: p-47-11 GPH
Post by: Babalonian on February 19, 2013, 02:48:21 PM

Anyone got some documentation on the P&W R-2800-59 handy?

Title: Re: p-47-11 GPH
Post by: Chalenge on February 20, 2013, 12:41:54 AM

Different product, but the A2A Simulations Jug (http://www.a2asimulations.com/store/p47/) indicates that it gets worse with altitude at cruise settings. Except for the "Ultra Bolt" that is.

Their Jug starts with the D-20 variant.

Title: Re: p-47-11 GPH
Post by: Krusty on February 20, 2013, 01:24:22 AM

The D11 (and alll 47s, and some other planes too) is turbosupercharged. That means it makes full power at ALL altitudes up to the FTH, then it drops off. This may be why fuel consumption stays the same. It's got no power dropoffs, no peaks, nothing to give GPH any variation, because as far as the engine's concerned, it's always running at sea level.

Title: Re: p-47-11 GPH
Post by: Chalenge on February 20, 2013, 05:49:26 AM

You mean it could hold a particular manifold pressure, obviously. That phrase "full power" is misleading.

Title: Re: p-47-11 GPH
Post by: Krusty on February 21, 2013, 01:58:28 PM

I mean it held FTH from sea level on up to 30,000 feet. Hence my use of "full power." The only differences in performance were related to density of air over the airframe, and not based on engine performance issues.

P.S. Planes that have turbosuperchargers (NOT just superchargers) in this game include:

all P-47s
all P-38s
B-17
B-24
maybe the B-29 (can't recall)

In theory all of them have the same GPH as they climb or descend because all are running at sea level air density.

Title: Re: p-47-11 GPH
Post by: Babalonian on February 22, 2013, 12:01:19 PM

Quote from: Krusty on February 21, 2013, 01:58:28 PM

I mean it held FTH from sea level on up to 30,000 feet. Hence my use of "full power." The only differences in performance were related to density of air over the airframe, and not based on engine performance issues.

P.S. Planes that have turbosuperchargers (NOT just superchargers) in this game include:

all P-47s
all P-38s
B-17
B-24
maybe the B-29 (can't recall)

In theory all of them have the same GPH as they climb or descend because all are running at sea level air density.

The R-3350?.... Pfffft.... F-yes!  (R-3350-TC Turbo-Compound, although mostly post-war, I think it was just a supercharger in early models)
http://en.wikipedia.org/wiki/Wright_R-3350
(http://upload.wikimedia.org/wikipedia/commons/b/b4/Wright_R-3350_change_on_B-29_in_India.jpg)

OT - FiFi is touring (with our fighters and PTs in escort) in the southwest in a couple weeks, I'm looking forward to seeing her at our hangar in 24 days, gonna be a big party.
(http://i675.photobucket.com/albums/vv115/Babalon84/AH%20Junk/FiFi-March_zpsa3dc38d4.jpg)