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I know you will, David, but felt I had to speak
up.
Can never be to careful at any time with this hobby, but
particularly in the early part where you are still learning the aircraft and
engine. Sounds like you are certainly getting plenty of RPM and good
manifold pressure. I usually caution folks with adjustable props to be
careful - in that you can set the pitch to get wild rpm but insufficient
thrust.
A gent I was acquainted with back in the late 1990s
(electronic whiz - sold modified auto ECUs for aircraft use), set his adjustable
such that he got lots of rpm, but unfortunately not enough thrust to propel him
safely out of ground effect. Crashed into a cactus because He could never
climb out of ground effect.
But if you are getting 5950 at a load of 29.5 (WOT) then
that tells me you have the engine well loaded. If it were 5950 at say
20-22 inches I would say you need to increase the bite (pitch) of the
blades. However, with that high a manifold pressure things look good to
me.
Now if you would just put a 1000 lb fish scale in that
line you have tied to the truck, we could get some real thrust measurements
{:>)
Looking forward to hearing the results
Ed
Sent: Friday, October 15, 2010 2:52 PM
Subject: [FlyRotary] Re: Test
Thanks Ed, will
do. Am getting 5950 RPM, 29.5 MAP static (tied to PU
truck) Ivo Prop three blade 68" elect. adjusted to fine pitch ( I think I
miss-spoke earlyer, another post, prop dia. of 72", our is 68", I do have a 72"
two blade, not using
).
David R. Cook RV6A Rotary. ----- Original Message
----- From: "Ed Anderson" < eanderson@carolina.rr.com> To:
"Rotary motors in aircraft" <flyrotary@lancaironline.net> Sent: Friday,
October 15, 2010 11:53:11 AM Subject: [FlyRotary] Re: Test
Enough to get the old heart a pumping - I still recall it
like yesterday.
Be careful on high speed taxi - always make certain
you and aircraft are ready for flight - even unintended flight. Some folks
advocate NOT doing high speed taxi test due to increased risk during that
phase. I recall one accident - where individual had not removed
control locks - because he was not going to fly, only do taxi test, well
he unintentionally lifted off - fortunately only damage to the
airplane. I know you won't do that, David, but just be prepared for flight
in any case.
Good luck
Ed
Sent: Friday, October 15, 2010 11:31 AM
Subject: [FlyRotary] Re: Test
Ok I'll say
something;;; Insurance coverage for N655HC will be bound on the
18th of this mth. so high speed taxing will get started, are running the eng.
high power w/cowel all in place testing for any cooling problems, that starts
sat. or this evening, now I need to get me up to
speed/airworthy.
David R. Cook RV6A Rotary Lansing MI. ----- Original Message
----- From: "Tracy Hallock (RR)" <thallock2@austin.rr.com> To:
"Rotary motors in aircraft" <flyrotary@lancaironline.net> Sent: Friday,
October 15, 2010 10:12:41 AM Subject: [FlyRotary] Re: Test
Yep, it's quiet, but mail is getting
through.
Sent: Friday, October 15, 2010 8:55 AM
Subject: [FlyRotary] Test
Test - too Quiet
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