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Help with fuel system using too much fuel  Topic is solved

Modeling aircraft systems, like electrical stuff, hydraulics, pneumatics? Feel free to ask support.

Re: Help with fuel system using too much fuel

Postby Bomber » Sun Sep 10, 2017 6:50 pm

http://wiki.flightgear.org/Howto:Write_ ... _in_JSBSim

Check out the spitfires fuel system.... it might help you.
"If anyone ever tells you anything about an aeroplane which is so bloody complicated you can't understand it, take it from me - it's all balls" - R J Mitchel
Bomber
 
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OS: Windows XP and 10

Re: Help with fuel system using too much fuel  

Postby benih » Mon Sep 11, 2017 5:31 pm

Thank you very much all,
i synchronized the fuel flows now and all seems to be ok.

I still assume little too much fuel consumption, but the numbers look promising.
benih
 
Posts: 96
Joined: Tue Aug 15, 2017 9:34 am

Re: Help with fuel system using too much fuel

Postby Thorsten » Tue Sep 12, 2017 5:14 am

Very good. :D
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Re: Help with fuel system using too much fuel

Postby benih » Wed Sep 13, 2017 7:09 pm

I did catch another one, now the numbers add up perfectly.

Another problem was, that i included the engine fuel consumption rate in the summer because i thought that this would be neccessary.
In fact it is obsolete, because the <feed> command already lets the last tank drain by the required ammount.
With the wrong <input> active, the tanks emptied wrongly at the rate 2x.

Code: Select all
<summer name="fuel/manifold-total-flow-pps">
            <input>fuel/pump-flow-rate-pps</input>
            <input>-/systems/fuel/tank[5]/leak-flow-rate-pps</input>
            <input>-fuel/manifold-dissipate-rate-pps</input>
            <!--    <input>-/fdm/jsbsim/propulsion/engine/fuel-flow-rate-pps</input>   NOT NECESSARY: engine sucks already (see feed command) -->
            <output>/fdm/jsbsim/propulsion/tank[5]/external-flow-rate-pps</output>
</summer>


Thanks for your help! You are a very great community!
benih
 
Posts: 96
Joined: Tue Aug 15, 2017 9:34 am

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