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View Full Version : I have 2 questions about the fuel tanks on P51.



Guard4891
06-15-2005, 09:51 AM
If u choose 25% fuel,u can see the fuel gauge says that u are taking more fuel than before v4.00.And if u choose 75% fuel,u can see all three fuel gauges are full.I dont know much about the fuel gauges thing,just find the change is interesting.

And n the game u have the fuel in the fuselage tank if u choose 25% fuel.But in many videos I saw those ww2 P51 pilots say that if the fuselage tank has more 40gal fuel,the plane is very unstable.So they usually first used the fuel in the fuselage tank after take off.Does that mean IRL the remain fuel should be in the wing tanks,if they had only 25% fuel?

Can any gents answer my two questions?

Guard4891
06-15-2005, 09:51 AM
If u choose 25% fuel,u can see the fuel gauge says that u are taking more fuel than before v4.00.And if u choose 75% fuel,u can see all three fuel gauges are full.I dont know much about the fuel gauges thing,just find the change is interesting.

And n the game u have the fuel in the fuselage tank if u choose 25% fuel.But in many videos I saw those ww2 P51 pilots say that if the fuselage tank has more 40gal fuel,the plane is very unstable.So they usually first used the fuel in the fuselage tank after take off.Does that mean IRL the remain fuel should be in the wing tanks,if they had only 25% fuel?

Can any gents answer my two questions?

horseback
06-15-2005, 01:55 PM
You are correct about the P-51 with the fuselage tank installed being quite treacherous if that tank is not drained as soon as possible. In real life, inappropriate maneuvering with that tank left more than half full claimed many pilots' lives, and it was left unfilled for all but the longest missions. It was not unusual for Mustangs to take off with droptanks rather than filling the fuselage tank when there was some doubt as to whether it would be possible to sufficiently drain it before entering the potential combat zone.

The fuselage tank was a wartime expediency for long range escort requirements; the aircraft was not designed for the extra weight in that location, and handled poorly while it was full.

In the game, however, there is no option for choosing which tanks will be filled, left empty, or switched to next for CG reasons. For all intents and purposes, CG is a "best case" for a given fuel level, so even if the fuselage tank in your Mustang is showing full (for a 50% capacity), the balance and handling of the virtual aircraft would be ideal (i.e., as it would in the real plane if the 50% fuel was in the wing tanks) for that fuel load.

Hope this eases your mind.

cheers

horseback

Guard4891
06-15-2005, 03:03 PM
Thank for the reply.

NonWonderDog
06-15-2005, 03:12 PM
If you want to see how dangerous the fuselage tank could be, fly a fully loaded Yak-9B. It carries 400 kg of bombs in the same place that the mustang carries an extra fuel tank.

Wild and nearly uncontrollable in a turn isn't the half of it. There's a relation between the CG and the placement of the wings that *must* be followed when designing a plane, and hanging bombs in the aft fuselage violates this rule like you wouldn't believe. I'm glad the mustang isn't like *that* in the sim.