I find that fourstroke engines are more reliable in the air. They go through fuel at a slower pace, so you save on money there. I can run my OS70 and 90 on a lower nitro percentage than a two stroke, so fuel is cheaper.  <div>
</div><div>For scale models, only a fourstroke will do, not only because of the wonderful sound, but because you can turn a bigger, more scale prop. </div><div>
</div><div>Best of all - almost no fuel on the sides of the model after flying! It drives me insane after having to squeegee the grass and oil conglomeration off my Escapade after each flight! </div>