Is a .60 size engine adequate?
I have an OS .60 FP engine that I'm considering using in a 4 star 60 ARF. Would like to get some input on this. Do you feel a .60 is adequate, or would I be better off with a .75 or .90? I'm not looking to be able to hand launch the thing, but I don't want a sluggish bird on my hands either. Thanks for any feedback.