[8D]I think you are talking about this one plane, here is the link

http://www.modelaircraft.org/plans/1982/367.jpg

The description reads somewhat like:

"P-39 Airacobra: CL Sport Scale, water-cooled .45 mounted aft, ext. prop shaft, retracts. Two sheets."

It must have had a boat engine "water-cooled .45 mounted aft", also someone I've met here in Columbus Ohio told me that he built a shaft for someone else, but that someone else chickened out and never flew the plane, so. . . Does anyone know whatever happened to the site for these guys;

American Eagle has moved to our new home...

www.flyrcmodels.com

the site plain doesn't work, do they still exist?