The engine is too wide to be fitted onto a 4.1m fuel tank (Tank diameter provided to you when selecting the "proton" option in the Select Diameter window), because of this decouplers collide with the engine when getting decoupled. You need a 4.8m diameter to stop the decoupler from colliding.
The engine is too wide to be fitted onto a 4.1m fuel tank (Tank diameter provided to you when selecting the "proton" option in the Select Diameter window), because of this decouplers collide with the engine when getting decoupled. You need a 4.8m diameter to stop the decoupler from colliding.