On Sat, 20 Dec 2003 10:06:12 -0500, "Larry Smith"
wrote:


"Ron Wanttaja" wrote in message
.. .
On Fri, 19 Dec 2003 18:05:53 -0500, "Larry Smith"

Thanks. As usual the big R comes through. I've seen the phenomenon but
it's not bothersome to someone knowing the great strength and elasticity
modulus of carbon fiber. Where is testimony that a blade has failed?
There is gossip about an Ivoprop but is it true?


I have a warp drive 70" 3 blade prop on my murphy rebel with an 0-290
engine. I'm very satisfied with the prop and have had no problems with
mine. It's fairly easy to change the pitch takes about an hour
including retourquing and safety wiring everything. You need to check
the torque on the clamp bolts every 25 hrs.
There have been some reports of cracked blades on high compression
engines. It's suspected that the negative power pulses at idle speed
is what causes the cracking.
Drew Dalgleish
Centralia Ont.