The HawkEYE 240 airframe is a small and lite airframe offering all the functions of an FPV quad. The 240mm is measered motor shaft to motor shaft diagnally. This airfram is designed to support 3-4s lipo batteries and run on small motors with a high kv rating for giving you the agile flight that you are seeking with a quad of this size. Small, durable, fast, and acrobatic....get out there and have some fun!!!!