Here is a couple of images of the larger helicopter,that had a tail motor burn out.I made sure I took some photos ,as I did not think such a thing would last long.Thankfully we have very large open spaces (grazing paddocks) so that helped a lot.Apart from a few scratches it lasted well,and looked like lots of fun.
I had to go to the battery shop today,were it was purchased,and the chap who runs the shop asked how it went-I told him about the blue smoke from tail motor,he told us to bring it back,and we got (or Santa got ) a full refund.He said all four copies he sold had the same fault.A real shame,as I really liked the look of the chopper with one blade system,most have two which looks a bit silly to me.
Apparently,the chap said those S107 (the smaller one we got for other son)were by far the best,but they no longer make them,but the owners are
testing a new one very similar.
Anyhow thanks for all the very useful links,I'm putting my spare change towards that scale model RC mineral dump truck ,at 75cm long and 19 cm
wide-must have! (thanks Jen

)
images as came out of 50D using 400L lens