Tanks with configurable fuel

[Slartibartfast]

Instead of having at least two of very fuel tank part cluttering the build menu, one for rockets, one for air or nerv engines they should all have a switch which lets you decide liquid fuel only, w/oxi, or monopropellant. Even mixed, more liquid fuel than oxidizer might be good a certain setups. Burn the oxidizer on launch and still have liquid fuel for nerv engines etc.

Thinking of this from trying to use MK2 parts for a space station, but only straight parts are exclusively liquid fuel. Adapters are only rocket fuel. And the odd ball inline MK2 clamp-o-tron is only monopropellant.

[Ogre420]

There's a (BUNCH) of mod(s) for that.

[Ogre420]

https://forum.kerbalspaceprogram.com/index.php?/topic/150104-17-configurable-containers/

https://forum.kerbalspaceprogram.com/index.php?/topic/106243-181173161151145131-interstellar-fuel-switch-ifs-3122/

https://forum.kerbalspaceprogram.com/index.php?/topic/58235-16-17-modular-fuel-tanks-v5123/

https://forum.kerbalspaceprogram.com/index.php?/topic/87605-15xfuelwings-v32f-fuel-customization-in-stock-b9-proceduralwings-04012018/

https://spacedock.info/mod/1665/WetterWings

[Slartibartfast]

Suggested as a parts reduction program. Suppliers of parts don't have to keep two or three varieties of everything in stock all the time.

[andylaugel]

The big problem with putting this sort of thing in the stock game is that the old parts are already in use. Eliminating them entirely will break old saves.