The Firebaby flew the best, period. My first one had a Spitfire 045 and later the others had Cox 049's as I recall. The good thing about the Firebaby was you could buy replacement parts. It outflew all the "Plastic" planes, hands down due to huge weight differences and once one of those broke the engines ended up on other planes. Many of the Plastics had to be "slung" to get them off the ground.