if you make an RC roaster, grab a scooter motor !
http://www.thesuperkids.com/scmococoki.html have a RC trailer full of lipos. Ive put 500+ miles on that schwinn s1000 w/rear wheel one ! That $349 brushless bad boy would make mincemeat out of the cops in the park.
edit: HAh ! yeah you work for Obama now