Fuel Units?

[Applemacbook13]

It never really specifies what the unit is for fuel, but since everything else is in base metric system, may I assume its liters?

[UmbralRaptor]

Arbitrary Fuel Units. Liters or some other volumetric units are a "good enough" approximation, though you get somewhat silly densities.

[numerobis]

Each unit is 5 kg for most propellents.

[UmbralRaptor]

*Most being fuel, air, and oxidizer

Monoprop is 4 kg/unit

Solid fuel is 7.5 kg/unit

Xenon is 0.1 kg/unit

Electricity is massless

[Applemacbook13]

Thanks!

[Smidge204]

You have a fairly common itch.

I'd be nicer if things were labeled.

=Smidge=

[Rusty6899]

The wiki says litres, I think it says a density of 500kg/cubic metre. Which doesn't work too well for the 5kg/litre, I'll double check.

[Rusty6899]

5kg/L so 5t/cubic metre. Pretty dense stuff (twice as dense as most earth rocks), but then again, what isn't in KSP.

[Mattasmack]

It never really specifies what the unit is for fuel, but since everything else is in base metric system, may I assume its liters?

It's a reasonable enough assumption. But, if you use 1 fuel unit = 1 liter, you end up with fuel densities that are very high and the fraction of tanks actually occupied by fuel is very low. If you assume instead that 1 fuel unit = 5 liters, you get fuel densities that correspond more closely to real-life rocket fuels and the volume of fuel in the fuel tanks is much more sensible. I would guess that the devs used 1 unit = 5 liters when setting up fuel properties and tanks, but since they've never said so explicitly (as far as I know, and I don't think the wiki is definitive) it's only my guess. I like the name 'fuel cubit' for the unit of fuel, which I saw in a thread some time back.