yes you could put a 50 cc in it easy. this is a 46 cc and it fits perfect. the instructions say 23cc but, for the weight i dont think it would do the job. it goes as low as a 120 4 stroke. this should be around 17 to 20 pounds so that small of motor i dont think would fly it as well. this plane is only going to go so fast nomatter what motor you put in it. but i do think the power is needed. the frame is strong enough. its very beefy. it also calls for up to a 2.10 2 stroke which is about as powerfull as a 50 cc gas. and i think the weight would be about the same. and i too think it is a eye catcher. hangar 9 did a great job with this one
