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dasduck(at)comcast.net
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 Posted: Sun Jun 03, 2007 8:01 am Post subject: Engine Sag |
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So many builders, so many different experiences.
I wonder if the mounts themselves affect this?
My O-360 RV-6 with wood prop initially sagged 3/16" (perfect, as I allowed for it) when I first flew it in 94.
500hrs later I changed to a Hartzell CS and it sagged some more, so I shimmed with some washers.
A local RV-8 builder allowed for a little sag, it sagged more than he expected and is now about 3/16 low. This on a plane less than a year old (O-360 CS).
So it will or it won't, regardless, you can fix it with the washers once you know.
don
From: owner-rv-list-server(at)matronics.com [mailto:owner-rv-list-server(at)matronics.com] On Behalf Of PeterHunt1(at)aol.com
Sent: Saturday, June 02, 2007 12:58 PM
To: rv-list-digest(at)matronics.com
Subject: Engine Sag
I built my engine cowl such that the spinner was 3/16 inches high because so many claimed the engine would sag. That did NOT happen to mine. After 200 hours the spinner remained just as high. No engine sag occurred. Well, I didn't like how it looked so I inserted an extra washer next to the engine on the two top engine mount bolts. Spinner alignment looks very good now and I didn't notice any performance change.
I installed a new O-360-A1A with CS prop. My experience is that if you torque everything properly there is no measurable engine sag with time.
Pete In Clearwater
RV-6, all electric panel
Reserve Grand Champion, Outstanding Aircraft - Sun 'n Fun 2006, 2007
See what's free at AOL.com.
[quote]
href="http://www.matronics.com/Navigator?RV-List">http://www.matronics.com/Navigator?RV-List
href="http://forums.matronics.com">http://forums.matronics.com
[b]
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jhnstniii(at)aol.com
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| Posted: Sun Jun 03, 2007 8:43 am Post subject: Engine Sag |
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I wonder if the variations are due to some people not placing the hard and soft durometers in the correct orientation. --LeRoy Johnston
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Jerry Cochran
Joined: 10 Jan 2006
Posts: 111
Location: Wilsonville, OR
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| Posted: Sun Jun 03, 2007 10:17 am Post subject: Engine Sag |
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Me too. No engine sag so far. RV-6a with XP360. If I ever do another, I'll build it win no anticipated sag.
Jerry
| Quote: | Time: 01:01:24 PM PST US
From: PeterHunt1(at)aol.com
Subject: Engine Sag
I built my engine cowl such that the spinner was 3/16 inches high because so
many claimed the engine would sag. That did NOT happen to mine. After 200
hours the spinner remained just as high. No engine sag occurred. Well, I
didn't like how it looked so I inserted an extra washer next to the engine on
the two top engine mount bolts. Spinner alignment looks very good now and I
didn't notice any performance change.
I installed a new O-360-A1A with CS prop. My experience is that if you
torque everything properly there is no measurable engine sag with time.
Pete In Clearwater
RV-6, all electric panel
Reserve Grand Champion, Outstanding Aircraft - Sun 'n Fun 2006, 2007 |
See what's free at AOL.com.
[quote][b]
| | - The Matronics RV-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?RV-List |
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