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Solved:Problem with Fuel Transfer across Rockomax Decoupler


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I have a station and a ship docked by the small docking ports. I am able to transfer monopropellant. the problem comes when I try to transfer liquid fuel or oxidizer. there is a rockomax decoupler 2.5 on the ship. I thought it might be the crossfeed not being on, but that made no difference. I can transfer fuel between the two tanks on the station.

This version 1.2 no mods on windows 10.

Anyone have any suggestion or similar problems?

Edited by AlanP
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31 minutes ago, AlanP said:

I have a station and a ship docked by the small docking ports. I am able to transfer monopropellant. the problem comes when I try to transfer liquid fuel or oxidizer. there is a rockomax decoupler 2.5 on the ship. I thought it might be the crossfeed not being on, but that made no difference. I can transfer fuel between the two tanks on the station.

This version 1.2 no mods on windows 10.

Anyone have any suggestion or similar problems?

transferring fuel manually doesn't care about crossfeed settings.  You should be able to transfer fuel regardless.

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@sal_vager so your telling me that when I dock a ship to a station I need fuel lines to transfer fuel to it if it has a heatshield or decoupler?

we are not talking about burn but alt-right click to transfer fuel. It works in sandbox.

reported Bug #13008

similar to Bug #13004

Edited by AlanP
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20 minutes ago, AlanP said:

@sal_vager so your telling me that when I dock a ship to a station I need fuel lines to transfer fuel to it if it has a heatshield or decoupler?

reported Bug #13008

I don't know how you managed to infer that from my post, I said "heat shields do not have fuel crossfeed, it is in the info panel for the parts so you will need a fuel line to allow transferring fuel through them"

Which can be seen here.

HCjUtnx.png

You can also disable 'Resource transfer obeys crossfeed rules' in the mini menu, advanced panel, yes this is a feature, please take a look at the changelog for 1.2

The relevant part is this.

Quote

Resource transfer in flight can be set to require valid crossfeed for those resources which obey crossfeed.

As the heat shields do not allow fuel crossfeed for those resources (LiquidFuel and Oxidiser) you will need this option.uS53Den.png

 

Disabling that will allow you to transfer your fuel.

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Yeah it will be a pain on old craft, and mono uses a different rule that ignores crossfeed limitations.

Though when you're building a new craft or fixing an old one in the VAB or SPH, if you run a fuel line from the vessel to the heat shield it'll add crossfeed to it, so it'll then pass to the docking ports.

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I'm glad I was able to help, there's so many little changes to 1.2 it's hard to keep up with them, so many things are togglable now from navball behaviour to commnet ground stations to fuel flow.

It'll take some time to explore all the options.

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