Author Topic: F4U-4 Fuel bug (Read 419 times)

Octavius · « **on:** November 22, 2004, 04:39:31 PM »

I grabbed a -4 the other day with 75% fuel and a DT.

I jettisoned the DT on climbout to see roughly how many minutes of fuel it contained at Mil power.

When I dropped it, the E6B gave me a reading of 16 minutes on 75% gas in the Hog4 (2.0 fuel burn). Is that correct?

So then I engage WEP momentarily and the flight time increased by a few minutes!

214thCavalier · « **Reply #1 on:** November 22, 2004, 05:56:41 PM »

Posted before Oct, and its correct the wep is water injection whilst in use it requires less fuel.

Engine · « **Reply #2 on:** November 23, 2004, 12:25:28 PM »

haha, oct is a newb. Even my mother (R.I.P.) knew WEP in the F4U-4 uses less fuel.

Edit: Now that oct feels stupid, I do too. How does this work? Does the engine actually overheat after 5 min of WEP usage, or is this just a representation of running out of the water being injected?

Octavius · « **Reply #3 on:** November 23, 2004, 01:00:02 PM »

Scrap · « **Reply #4 on:** November 23, 2004, 01:11:05 PM »

Isn't it a water/alcohol mixture? And if so.. I believe it would overheat due to the extreme heat of alcohol during combustion.

icemaw · « **Reply #5 on:** November 23, 2004, 02:16:46 PM »

Quote

Originally posted by Scrap
Isn't it a water/alcohol mixture? And if so.. I believe it would overheat due to the extreme heat of alcohol during combustion.

Alcohol burns at a much lower temp than gasoline. Allso the water in the mix lowers the cly head temp. I am pretty sure the Alcohol content was just to keep the water from freezing anyways and not as a fuel booster.

whels · « **Reply #6 on:** November 23, 2004, 02:36:59 PM »

Quote

Originally posted by Engine
haha, oct is a newb. Even my mother (R.I.P.) knew WEP in the F4U-4 uses less fuel.

Edit: Now that oct feels stupid, I do too. How does this work? Does the engine actually overheat after 5 min of WEP usage, or is this just a representation of running out of the water being injected?

there is a bug in F4U fuel usage. ive noticed on E6b the GPH
will fluctuate up n down on its own in level flight.
example: GPH will read 500 then suddenly blip up to 660
then jump back down to 500 all in a matter of a sec.

whels