Paul Yaw wrote:

This may top the silly question list, but a bit of embarrasment before
the new year will be OK since I will forget all about it when I open my
gifts on Saturday.  There were two Ivo props shown in a previous
message. One of them was rated at 100 to 700 horsepower.  The 100 to 700
hp version was used on an airplane which had a 260 hp 13B that I built.
74" diameter I think.  With the engine at full throttle, (43" mp) the
rpm never dropped below 6,200 rpm no matter how the prop was set.  If a
260hp engine can spin it 2850 rpm (2.17 reduction ratio.) what is going
to happen with 700 hp on tap?  What am I missing? Before anyone answers
please consider that I know nothing about props (Or airplanes for that
matter.) so make it easy to understand.

Paul Yaw

Good question Paul I don't really know but I can guess.
The prop is made out of rubber so the pitch flattened out?
Perhaps the blades went into torsional flutter without
failing?

The 700 HP is a bad joke?  I mean how many people are going to
test it with 700 HP? Your average PT6 jock is not going to
put an IVO on his Cessna Caravan now is he?

Paul Lamar
 
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