Neurotex,
does the .049 or .020 have a carb with a throttle on it? i used to have one of those old Cox F4U .049 powered CL plane, but there was no throttle on those, just wide open. i've always wanted to try a tiny gas motor on a tiny RC plane, but i would want to be able to have speed control, and as far as i can remember, the .049 was the smallest with a throttle. a .020 with a carb and throttle on it would be perfect.
good looking F-15, Scott. i've got some other .PDF files of some other AA jet platforms on my computer if you want them. there's also a couple in this thread, post #13 i think:
http://www.rcuniverse.com/forum/m_37..._1/key_/tm.htm
nick