I love the looks of the Shoestring, its so nice and I have a YS110 sitting in the hobby room. With a 14x10 I should be getting about 9,750 RPM only. Still would be really interesting. I think I have a 12x12 prop somewhere in the bag. Hmmmm ... I would estimate the top speed to be about only 90 mph. Not ballistic but then with a 14x10 she will really have good thrust.