I guess that's like the difference between a Raven and a Crow. A Raven has 5 pinion feathers on the end of his wings and the Crow has 4 pinion feathers. Therefore, the difference between a Raven and a Crow is just a matter of "a pinion".

Actually, my wife is doing all she can to get interested in the hobby. She has been flying the simulator and I have taken her up on the buddy box a few times. The plane is for her and she just thinks "it's sooooooo cute" *gag*. But she likes the single better than the double. I have told her I don't think we can get a single very easy, she may have to settle for the double....

T.