[link=http://www.rcuniverse.com/forum/forumid_92/tt.htm]Engine Conversions [/link] Forum
Read up some of the converting they've done.
Sure you can put a gasser weedie on a plane, but they also have gotten into getting that weedie to run on a glowplug and 2gas:1Nitro - no big flywheel,magneto/coil, or spark radio interferance. Amazing stuff happening in the conversion forum, they'll get your leafblower to have better hangtimes while airborne.