The AIRTUG Model 6-S model is extremely easy to use because of its’ unique “Throttle Grip Control” system utilizing a hydrostatic transmission as the heart of the Airtug, a heavy duty variable speed , 6 horsepower gas engine. They guarantee your safety with their “Return to Brake” feature that absolutely prevents any unintentional movement of the plane when the throttle grip is released. There is no metal to metal contact, no gears to shift and no jerky clutching systems to quickly wear out. Finally, its’ pinpoint handling makes this unit a great choice. All of these features simply make this aircraft tug the best in the industry!