Originally Posted by GeetarJoe
not necessarily. 4 strokes develop less power for their size than do similarly sized 2 strokes using the same fuel. however, they do develop more torque and can therefore turn larger diameter props. this makes for more thrust.
I agree. My third 4-stroke was a Magnum 91 ( first the OSFS60 Mk-1 and then the OSFS 120 Mk-1) that was a real puller, still have it. The day I quit flying Cosmo 3 degrees 's and Blue Angels pattern I did quit 2 strokes. Sound experience is different for everyone but for me the 4 stroke sound is sweeter and with less high pitch. My flying buddy and I have a few big warbirds like Corsair Spitfire Thunderbolt and Mustang (and Cap 21 Gee Bee R2 and Sportster) and there we use King or DLA or Zenoah gas engines. One Seidel radial in yet another big one aside)