Weird numbers for fusion fuel tanks
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First off the dry cost is weirdly low.
The Deuterium Tanks have less than half the mass of the hydrogen one but from what i can find deuterium is slightly more than double the density. This might be because the hydrogen tank is counted as a cylinder. I would also expect the helium tank to have significantly more cooling cost.
The problem is the combined tank. Its dry mass is higher than the D and He3 tanks combined. Its almost 2 D tanks combined. Also the ratio of D to He3 is wrong. It appears to be reversed. Fusion needs a 1-1 molar ratio of D and He3 which by mass is a 2-3 ratio. The tank stores about twice as much D than He however. The arbitrary units the fuel is displayed in do seem to be in a 2-3 ratio however so that might be the problem.
Also the tanks say they have 0 mass in the VAB list. The hydrogen tanks use their hydrogen containing dry mass instead.
Good thoughts! Changing this is probably not going to happen, would have been better to have this input in the development phase.
but the fuel switcher works on random tanks. why cant you fix the dry mass on this one?
The displayed in the part list? Hardly seems worth it.
no, the combined tank having twice the dry mass of the deuterium tank despite holding less mass.
also the volume ratio is 4 to 1
I proposed the change on the forum. See what the average user thinks.
You'll be pleased to hear that people in the forum generally support the change, so I will make it with the next update.
Also a 10m tank like the one from cryotanks would be nice for actually going interstellar. i dont know what the minimum mass of an mks colony is but its probably quite heavy. with the fresnel going at 1/1000c the ship would have to be 1 third fuel.
Changed in 1.1.0