Ivo Prop on O-320

Jim Carriere wrote:

snip snip

I wonder if the fellow in this example chose the lower pitch range, and
if he would see top speed improvement (and some loss of takeoff and
climb performance) if he had chosen the higher pitch range.

Just my guess...


Per my telephone conversations several weeks back, this WAS with the
higher pitch range. Considering the engine applications we are using
have quite a bit of surplus HP at sea level, it appears to be a good
tradeoff using the fixed pitch cruise prop.

At this point the best I can tell is if you REALLY want a CS prop on a
higher HP engine that cant support a governor.. then you need to drop
$10 grand and go with the MT. Personally I WANT a CS unit on the
homebuild.. but I am more interested in XC/top end speed. The velocity
will be used mainly off paved, longer runways, no short field bush
stuff, and probably minimal mountain stuff since we are flatlanders..

The pitch range question was the first thing I thought of when I heard
of Tracy's problem. I apologize for not including it in the original post.

Dave