F-15 Fuel System

[Pineapple Pete]

Greetings,

I am trying to learn the fuel system on the F15 and I am wondering if any one can point me in the right direction. I have read through the manual but cannot seem to find the answers to the following questions.

It appears that the fuel usage priorities are automatic since there is no fuel selector panel. So assuming that I am carrying three drop tanks, what is the priority of use for each fuel tank, internal and external, by the engines?

Or, can someone tell me where in the documentation I will find this information?

Many thanks.

[Joni]

You can find it in the manual, dont have it here right now but you can see the index for easy reference.

 

The external fuel tanks are consumed first and then the internal. There isnt much more info though since it is not a full simulated module.

[Svend_Dellepude]

This is how the F-15E works:

 

During normal operation 200 pounds of tank 1 fuel is transferred before the internal wing tanks start transferring. This is called " CG kick" and the goal of this procedure is to place the aircraft's center of gravity a bit more aft. Once transfer from wing tanks kicked in, all three transfer pumps operate simultaneously during either flight or ground operations. Although tank 1 fuel capacity is higher than the capacity of any of the wing tanks, the pumps' fuel transfer rate is set such a way, that tank 1 and the wing tanks empty within 200 pounds of each other.

 

The F-15C should be similar, though I'm not sure they have the same CG.

 

http://www.f-15e.info/joomla/technology/fuel-system/90-internal-fuel-system

Edited August 17, 2015 by Svend_Dellepude

[strikeeagle]

This is how the F-15E works:

 

During normal operation 200 pounds of tank 1 fuel is transferred before the internal wing tanks start transferring. This is called " CG kick" and the goal of this procedure is to place the aircraft's center of gravity a bit more aft. Once transfer from wing tanks kicked in, all three transfer pumps operate simultaneously during either flight or ground operations. Although tank 1 fuel capacity is higher than the capacity of any of the wing tanks, the pumps' fuel transfer rate is set such a way, that tank 1 and the wing tanks empty within 200 pounds of each other.

 

The F-15C should be similar, though I'm not sure they have the same CG.

 

http://www.f-15e.info/joomla/technology/fuel-system/90-internal-fuel-system

 

You are correct.

[Joni]

I dont think the C version works exactly the same way, based on the fact that the E one is designed to maintain its center of gravity during all flight instances including once some of the ordinance have been dropped and some havent. But for this simulation purposes it's enough what we stated so far.

 

 

Hope it helps.

[Pineapple Pete]

Thanks eveyone.