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kcgb avatar image
kcgb asked kcgb commented

Fuel Line Questions

In the new fuel systems is it possible to have multiple fuel lines going to / or coming from a valve?

I currently have a setup of a low-pressure pump and a high-pressure pump going to an engine valve. and from the valve, it goes to the engine and crossfeed valve. The crossfeed valve is also set up with 2 inputs and 2 outputs.

The system isn't working and I'm assuming it's because of this.

Should I be using junctions for this purpose instead?


fuel-system.png

The Image is a little out of date, the tanks are all just gravity feed with valves in between for simplification now. but the general idea is the same as the current setup.


aircraft
fuel-system.png (118.1 KiB)
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FlyingRaccoon avatar image
FlyingRaccoon answered kcgb commented

Hello @kcgb

Yes you can have multiple lines going to/from a valve.

The potential issue I see with your design would be bringing fuel to engine/APU by gravity. This will not work and these components need a pump.
For now, gravity can only be used to transfer fuel between tanks.

As for your "new setup", just be aware we have a bug in SU9 where fuel flow will drop if one of the output lines is closed. This will be fixed with SU10.

Regards,
Sylvain

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FlyingRaccoon avatar image FlyingRaccoon ♦♦ ·

Hello @kcgb

My bad, it appears valves are limited to 2 lines. The information is missing from the doc. We'll add a table to provide this information in the doc.

So for the crossfeed valve, here are your options:
1657283202411.png

Regards,
Sylvain

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1657283202411.png (53.6 KiB)
kcgb avatar image kcgb FlyingRaccoon ♦♦ ·
Thanks, I ended up implementing the "New Setup" and its works as expected so far.
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