Just one, although you can fly it fairly slow, if you get it too slow it will drop a wing, but it recovers real easy as long as you have the altitude. I stalled mine on landing approach during my maiden. Luckily I was only a foot off the ground, almost to the runway when it happened so no damage other than a bent landing gear. So now I just carry a click or two of power on landing approach. I really enjoy mine. I'm currently converting mine over to electric power.