what with the high wingloading of the 190; 4 cannon, 2 MG, 2 BIG rockets, full fuel & a few hundred kg of bombs would have required a very long takeoff roll if the landing gear would support all that weight...i've read by a 9th AF P-47 pilot that sometimes HVARs wouldn't fire if the 0.50s were fired before trying to use the rockets (ejected shell casings cuting the fusing wires) & wouldnt be too surprised if the same applied to FM-2s, F4Us, F6Fs & P-51s