This is the antenna I am building: http://www.davemorris.com/dave/MorrisDFLoop.html
"it occurred to the author that a full wavelength loop antenna would fit perfectly inside a Dragonfly, Q-2, or other aircraft having a non-metal tail cone of approximately 31 inches diameter, and that such an antenna could provide all the advantages for which loop antennas are well known." Interesting read and a better antenna that can be removed and repaired easily if needed. Craig www.kr2seafury.com