I have a ST 90 Farley new and in good shape. I want to put it on a sport scale 82" Eindecker. I am building the Eindecker out of scrap parts (SR Telemaster wing etc) and want to use stuff I have laying around (OK I am a cheap skate). The question is --- What is the pinility of over propping the ST 90. For scale reasons I want to swing an 18 x 6 prop instead of a 13 x 6. I looked for a 18 x 4 but they don't seem to exist.

By the way in other post people complain about buying bad engines. I sell stuff and I have 100% positive feedback. So look at the feedback. If there is any complents run!!!! Also their is a lot of stuff for sale on this site. Is all this stuff also for sale because it is no good. I have found that in the RC airplane comunity most folks are good people!