kk0425 Posted January 20, 2014 Posted January 20, 2014 The fuel tank logic seems to b incorrect for all aircraft, not just the F-15. It doesn't work as it should in the A-10C either.
TAW_Blaze Posted February 4, 2014 Posted February 4, 2014 According to scorpion the centerline external is drained last so if you drop the 2 wing tanks at 17500 you would lose no fuel at all. He also claims to have proof for this (yet to see). I tried it multiple times today and yesterday, tried repairing my dcs, but it simply just drains all externals at the same time. When I drop the 2 wing tanks I go down from 17-18k to about 15k..
blkspade Posted February 4, 2014 Posted February 4, 2014 Fuel tank logic is incorrect, and has been since at least FC2. http://104thphoenix.com/
mvsgas Posted February 4, 2014 Posted February 4, 2014 (edited) Not exactly sure what is wrong with the tanks logic, some info on F-15 fuel transfer. The fuel distribution (transfer) system uses three electric impeller type pumps; one in each internal wing tanks, and one in fuselage tank no. 1. Each auxiliary fuselage tank is equipped with an injector pump operated by transfer pump pressure. The system automatically transfers fuel from all tanks to fuselage tank no. 2 which feeds the right engine, and to tanks 3A and 3B which feed the left engine. The conformal tanks contain two electric impeller type fuel transfer pumps which transfer fuel to internal tanks. External tanks are pressurized by regulated engine bleed air during flight and transfer fuel to internal tanks. Fuel is transferred first from external tanks to any tank that will receive fuel, and normally external wing tanks transfer to the centerline tank, then to fuselage tank no.1. Also, IIRC, after burner use will affect external tank fuel transfer since engines can burn fuel faster than the system can move the fuel from the external tanks. I know this happens in a F-16 for a fact. Edited February 4, 2014 by mvsgas To whom it may concern, I am an idiot, unfortunately for the world, I have a internet connection and a fondness for beer....apologies for that. Thank you for you patience. Many people don't want the truth, they want constant reassurance that whatever misconception/fallacies they believe in are true..
mvsgas Posted February 4, 2014 Posted February 4, 2014 http://www.f-15e.info/joomla/en/technology/fuel-system/92-external-fuel-tanks To whom it may concern, I am an idiot, unfortunately for the world, I have a internet connection and a fondness for beer....apologies for that. Thank you for you patience. Many people don't want the truth, they want constant reassurance that whatever misconception/fallacies they believe in are true..
TAW_Blaze Posted February 4, 2014 Posted February 4, 2014 (edited) Thank you for the link. I think I found out what the problem is. I was burning that fuel down with afterburners in test, but according to this: Normally external wing tank fuel transfers before centerline tank fuel. If engine consumption exceeds transfer capacity, then all internal and external tanks transfer simultaneously. I'll investigate shortly without using burners, see how it works. edit: same result without burner, they're drained simultaniously Edited February 4, 2014 by <Blaze>
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