I started out with 4S from the first plane I bought. It had an O.S. 26 Surpass and flew just great. After that I built a Goldberg Freedom 20 and used the same model engine and loved the performance. Then a Decathlon with an O.S. 70 Surpass and it was off the ground almost immediately. I always liked the low end torque of the four stroke. I got out of the hobby for a few years and am now getting back in. To get started quickly, I bought a Nexstar ARF with the O.S. 46FX. Although the engine has lots of power for this plane, it does take a longer takeoff roll for the engine to build a little power before lift off.

I am now building a GP Ultimate Bipe and am planning to use a Saito FA-72 4S in it for power. For my money, the 4S is hard to beat in performance and the maintenance is minimal. Of all of the 4S engines I have owned, I am yet to need repairs on any of them.