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randy(at)romeolima.com
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 Posted: Tue Apr 17, 2007 7:20 am Post subject: RV-List: Clocking the prop. Real world data |
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Wow Mike, great info!!! I've long been curious about prop clocking but there are some obstacles to just trying it as you ran into with the crank flange bosses. Of course you're working on a 6-cylinder where most of us are flying 4-cylinders. Anyone out there want to do some prop clocking experimentation with an O-360?
If anyone in the Northwest wants to try some clocking experimentation I can assist with the measurement. Our EAA chapter has a DSS Micro MicroVibe II balancer.... http://www.eaa105.org/Programs/programs.htm#PropBalancing
Best,
Randy Lervold
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dan(at)rvproject.com
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| Posted: Tue Apr 17, 2007 8:46 am Post subject: RV-List: Clocking the prop. Real world data |
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Randy, you might find this interesting:
http://www.rvproject.com/m20j/pdfs/service_bulletins/sbm20-206.pdf
On my last Mooney, I flew behind an IO-360-A3B6D. What made it an -A3... vs an -A1... were the reindexed prop flange bushings, and thus the clocking of the prop (per the SB listed above). That was one very smooth engine, but I can't say I had the opportunity to fly it before the conversion was done.
The -A1B6 I have in my RV-7 had notable vibration early on, but after I broke it in, I had it dynamically balanced by Jim Fackler to 0.01 IPS (http://www.rvproject.com/20040427.html). While I did originally consider converting my -A1B6 to an -A3B6, it didn't end up being necessary in the end. The dynamic balance took care of it.
Kahuna, I assume you dynamically balanced the prop before diving into the reclocking project? I didn't see any notes about that on your site.
)_( Dan
RV-7 N714D
www.rvproject.com / www.weathermeister.com
[quote] ---
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kahuna
Joined: 02 Feb 2007
Posts: 93
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| Posted: Tue Apr 17, 2007 9:14 am Post subject: RV-List: Clocking the prop. Real world data |
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Yes it was dynamically balanced on 6 different occasions. 3 different individuals. No weight required. .02-.04ips on each run.
Ill make a note of it on the web page.
Mike
From: owner-rocket-list-server(at)matronics.com [mailto:owner-rocket-list-server(at)matronics.com] On Behalf Of Dan Checkoway
Sent: Tuesday, April 17, 2007 12:43 PM
To: rv-list(at)matronics.com; rocket-list(at)matronics.com
Subject: Re: RV-List: Clocking the prop. Real world data
Randy, you might find this interesting:
http://www.rvproject.com/m20j/pdfs/service_bulletins/sbm20-206.pdf
On my last Mooney, I flew behind an IO-360-A3B6D. What made it an [b]-A3[/b]... vs an [b]-A1[/b]... were the reindexed prop flange bushings, and thus the clocking of the prop (per the SB listed above). That was one very smooth engine, but I can't say I had the opportunity to fly it before the conversion was done.
The -A1B6 I have in my RV-7 had notable vibration early on, but after I broke it in, I had it dynamically balanced by Jim Fackler to [b]0.01 IPS[/b] (http://www.rvproject.com/20040427.html). While I did originally consider converting my -A1B6 to an -A3B6, it didn't end up being necessary in the end. The dynamic balance took care of it.
Kahuna, I assume you dynamically balanced the prop before diving into the reclocking project? I didn't see any notes about that on your site.
)_( Dan
RV-7 N714D
www.rvproject.com / www.weathermeister.com
[quote]
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| | - The Matronics Rocket-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?Rocket-List |
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smokyray(at)yahoo.com
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| Posted: Tue Apr 17, 2007 7:19 pm Post subject: RV-List: Clocking the prop. Real world data |
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Awesome! I have been trying to nail down a "pesky" harmonic in my Rocket at 2100-2400 rpm. After a dynamic balance, clean fuel injectors, new plugs and re-timing the mag and checking electronic ignition, vibration continues. Sounds like this is the ticket...thanks!
RR
Dan Checkoway <dan(at)rvproject.com> wrote:[quote] (at)page Section1 {size: 8.5in 11.0in; margin: 1.0in 1.25in 1.0in 1.25in; } P.MsoNormal { FONT-SIZE: 12pt; MARGIN: 0in 0in 0pt; FONT-FAMILY: "Times New Roman" } LI.MsoNormal { FONT-SIZE: 12pt; MARGIN: 0in 0in 0pt; FONT-FAMILY: "Times New Roman" } DIV.MsoNormal { FONT-SIZE: 12pt; MARGIN: 0in 0in 0pt; FONT-FAMILY: "Times New Roman" } A:link { COLOR: blue; TEXT-DECORATION: underline } SPAN.MsoHyperlink { COLOR: blue; TEXT-DECORATION: underline } A:visited { COLOR: purple; TEXT-DECORATION: underline } SPAN.MsoHyperlinkFollowed { COLOR: purple; TEXT-DECORATION: underline } SPAN.EmailStyle17 { COLOR: windowtext; FONT-FAMILY: Arial; mso-style-type: personal-compose } DIV.Section1 { page: Section1 } Randy, you might find this interesting:
http://www.rvproject.com/m20j/pdfs/service_bulletins/sbm20-206.pdf
On my last Mooney, I flew behind an IO-360-A3B6D. What made it an -A3... vs an -A1... were the reindexed prop flange bushings, and thus the clocking of the prop (per the SB listed above). That was one very smooth engine, but I can't say I had the opportunity to fly it before the conversion was done.
The -A1B6 I have in my RV-7 had notable vibration early on, but after I broke it in, I had it dynamically balanced by Jim Fackler to 0.01 IPS (http://www.rvproject.com/20040427.html). While I did originally consider converting my -A1B6 to an -A3B6, it didn't end up being necessary in the end. The dynamic balance took care of it.
Kahuna, I assume you dynamically balanced the prop before diving into the reclocking project? I didn't see any notes about that on your site.
)_( Dan
RV-7 N714D
www.rvproject.com / www.weathermeister.com
[quote] ---
| | - The Matronics Rocket-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?Rocket-List |
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