Mailing List flyrotary@lancaironline.net Message #2018
From: Tommy James <twjames@healed.org>
Subject: RE: [FlyRotary] Re: Ivo Magnum Pitch Question
Date: Fri, 20 Jun 2003 13:58:05 -0500
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Update:  Thanks to Dave, Tracy and Ed!!
I ran the engine this morning with the pitch reset at a nominal 60".
WOT produced static rpm of 4350 (smooth) at MAP of a hair under 30".   If
Tracy's delta rpm of 1200 hold true for this prop, then we should see 5550
for WOT cruise and about 150kts. (Vne is 167kts., Va is 98kts.)
Seems to be a reasonable place to start, or am I missing something?
Tommy<><

"But you need to clarify your test results a bit.  What does it mean when
you
say you were at  less than full throttle "but the engine did not seem to
want to advance from there"?   Do you mean that the engine does not go
faster when the manifold pressure goes from 25" to 30"?  If so, this defies
all logic and qualifies as in the  "do not fly until solved" category."

Tracy Crook



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