tthewman

Hi I'm running into a bug, but note that this is on version 1.5.2 and may indeed be fixed with the latest version. I'm using a 2.5m particle bed reactor paired with a thermal generator, a thermal nozzle and either hydrogen, hydrolox or hydrazine fuel. The bug is happening with hydrolox and hydrazine (haven't tried any other fuels yet). When I launch with just the thermal nozzle, the thrust when using hydrolox and hydrazine does not increase with altitude. Even in space the thrust is the same as it is on the ground, and that includes using srb's to get to space. This is making thrust with hydrazine and hydrolox LESS than it is with hydrogen. As far as I'm aware, thrust should be 1.4x hydrogen using hydrazine and 2x hydrogen using hydrolox, so I'm thinking this is a bug with the atmosphere curve of those 2 fuels, and most probably other fuels as well. Anyone else noticing this? EDIT: The Reactor, nozzle and generator are 3.75m parts, and the fuel tanks are 2.5m. The problem is definitely with the 3.75m parts, most probably the nozzle as when I tried 2.5m just now it worked as expected. I'm about to try 5m and will edit again with results. EDIT 2: Alright it seems like a bug with tweakscale and the thermal nozzle. With 5m parts the thrust didn't even increase over 3.75m for hydrazine. It did for hydrogen but now hydrogen has the same bug as hydrazine had: ISP and therefore thrust not increasing with altitude.