I can't answer your first question, but I can speak to the second.

Yes...RC aircraft most commonly operate in the 72MHz band, though you might also find them in the 6m HAM band, Spread Spectrum (2.4 GHz), or 27 or 49 MHz range.

A rather complete listing of the Freqs you'll find RC aircraft on can be found at http://www.modelaircraft.org/comp/frequency.htm

HTH