Here is the flight testing video of FY-20A. what an awesome Flight stabilization system FeiYu has developed. After you turn on the trainer mode, there is no way you can crash an RC plane when learning. Make planes go totally soft on turns, does not allow you to do any aerobatics. Turns your plane into a perfect learning and perfect stable flying machines. Its suitable for any 4 channel plane and even works on bigger nitro or gasoline planes. If you are a beginner RC pilot learning to fly, get one now and forget about crashing your RC plane. FY-20A will save you lots of money by reducing your crashes to minimum or even zero. This system is available at as well. Use my name alishanmao to get 5% off when you buy anything there. Comments and feedback welcome at [email protected] or [email protected] Don't forget to subscribe to Hey Check out my Highly Recommended Products at Kit here: