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1. 04:06 PM - Re: Re: Low RPM (jrpearson@brant.net)
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Thanks Mark,
I think I've narrowed it down to the governor linkage.
J.P.
-----Original Message-----
From: "Bitterlich, Mark G CIV NAVAIR, WD" <mark.bitterlich@navy.mil>
Sent: Mon, 07 October 2013 16:16:59
Subject: RE: M14PEngines-List: Re: Low RPM
When you have everything wide open... pushed to the firewall, and you take the
aircraft into a dive leaving everything wide open... and I am talking a steep
dive here, does the RPM go up, or does it stay governed at 88%?
Note: If you are not developing enough power to take the engine to 100% due to
fuel flow, carburetion issues, or throttle cable sleeve clamping, then in a
dive the engine RPM will increase and go to the maximum setting that the governor
will regulate. In other words, RPM will go up.
If you are in the dive, and the engine RPM stays close to exactly the same, then
you've got a prop governor issue, or possibly blade angle.
I defer to Dennis on all engine issues, but this test might be of some help.
Mark
-----Original Message-----
From: owner-m14pengines-list-server@matronics.com [mailto:owner-m14pengines-list-server@matronics.com] On Behalf Of A. Dennis Savarese
Sent: Friday, October 04, 2013 16:26
Subject: Re: M14PEngines-List: Re: Low RPM
Look at the things that are common to both engines since the symptom has not changed
when you changed the engine.
- Prop
- Throttle Cable
What did you set the blade angles to on the V530? ie: How many degrees and at
what reference point on the blades?
The throttle cable sleeve might be slipping. If it slips at all, you will not
get full throw at the carburetor. That could be why you feel like you can push
it further with no increase in RPM. Check to see if the sleeve is moving anywhere
from the throttle lever through the firewall and then to the carburetor.
Do you have a fuel flow instrument in the airplane? If so, what is the fuel flow
at WOT on take off? Normal for an M14P 360HP engine is between 37 and 41 gallons
per hour.
Dennis
________________________________
From: john.pearson757 <ssvpearson@hotmail.com>
Sent: Friday, October 4, 2013 3:00 PM
Subject: M14PEngines-List: Re: Low RPM
Thanks for the reply.
The prop is a 2 blade V530 - different governors. It is going to the stop.
I think the throttle is OK. When I reach 87%, I can push the throttle forward
quite a bit more.
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