no.. it wouldn't perform well on a 50 engine.. i had a 90 on mine... and it still need power ( maybe at our altitude..we need it).. and the Funtana 40 is VERY pitch sensitive.. i would recommend the HARRIER 90.. i've seen this thing perform and i can get it at the same price as the FUNTANA 40. as for engine for it.. u can use a saito 120 or 100 if you are at sea level.. hope this helps