RE: dle20 or a os 120??
Yes the DLE will out perform the OS 120 FS. I just replaced an OS 120 with a DLE 20 in a Top Flite kit built P-40. It has significantly more power. Also replaced an OS 120 in a VQ Hurricane. The OS turned a 15-8 three blade prop 8,250. The DLE turns the same prop about 8,550 rpm.