...The Killer is a side mount engine, and doesn't lend
itself to the O.S. RF, on the Hanno.

I have a Magnum .91 4-stroke, and it's one of the
best engines I have ever run, however It's too heavy
for the Killer IMO. Want a real light, inexpencive,
crankin' motor ? The Tower Hobbies .75...$100.
Super warrantee. Mine turns a 11-7 1/2 Master
Airscrew at 14,000 RPM's.

With the Tower .75, there won't be too many
planes that will out speed it, or out-climb it. The
RF or Hanno engine is the correct engine for a Kaos,
or Super Kaos.

Dave.