If you don't start with at least a 40 size glow plane, you are just adding another step in the learning curve to get into this hobby. Standard 40 size trainers cruise about 40 mpg. Sport planes are around 60 mph and have much quicker response times. You have to be able to handle a standard trainer easily before you can move on to sport or scale planes. I think starting with anything slower is a waste of time. [8D]