Hi M.Goldstein, Last winter I built a brand new Hirobo Bell 47G Gas engine 24c.c ( see picture on my Gallery) I flew it for the first time last week it is a very stable helicopter and easy to fly.When I flew it last time as I was hovering at about 15 foot height,without any warning the UNIT fell on the ground. I brook it for may be $600. Now I have few questions for you.My radio is a FUTABA 7CHP the Receiver is aFP-R 127DF .The Receiver was fixed under the seat in the cockpit. The antenna was free under the UNIT. Q. #1 Is this receiver compatible for this Big Machine? Q#2 Could my receiver to close from the engine and was overheated by the engine?My last Q.I ordered a new radio Futaba 2.4 GHz will it resolve the problem? Thanks and Best Regards Claude