It was probably a jim Walker Firecracker with an AJ 065 motor. The motor was really an Anderson Spitzy 065 with a vacuum throttle. You had a plastic line to the bellows and a squeeze bulb in your hand. It kinda worked but like you said the drag was more then the throttle effect was worth. The plane and motor in pristine condition today would bring tears to your eyes and a sizable chunk of change to your pocketbook.