I have a fellow flyer that wants to enter into the gas engine birds, he bought a Weed Trimmer that has a 25cc Gas Engine and plans to convert it, if not mistaken I think it's a Ryobi engine. Now the question we got is what size of bird (Weight) he can use with this size of engine???, since he's not a experience flyer you can recomend not only the weigth but the plane to.

Best Regards,

Daniel