I purchased the Flyingiron Spitfire LF Mk 1Xc today. It is a nicely modeled aircraft but the both times I have taken it up, the engine has cut out approx 5 minutes into the flight. That really makes it a waste of time and money. Any help appreciated. Also today, I purchased the Bell 47G Helicopter. Both myself and the computer pilot have failed to get it off the ground without crashing. It just rotates around and around and then crashes. You would think that the computer pilot could fly it. Again, any help appreciated.