Ducted Fan Engine

[Hans Hintermaier]

Cliff Ducharme wrote:
>As far as using a ducted fan engine is concerned, forget it!  These 
>engines run 15% - 25% nitro content alcohol-based fuel at 2-3 ounces
>per minute consume glow plugs (one per ten minute flight), have a 
>nasty habit of flaming  out, and 
>if not carefully cleaned up after each session, develop rust deposits 
>in their crankshaft bearings that often lead to catestrophic engine failure.

If you reduce compression and fit a spark-ignition-system, you can 
use normal-gas without nitro and therefore won't have any corrosion 
inside the housing.
A model-engine normally is very reliable for years (exept 
race-engines which sometimes make more than 32000 RPM!)
But I would also prefer electrical motors..
Hans
hiha@ brain.nefo.med.uni-muenchen.de