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haavard-iversen(at)c2i.ne
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 Posted: Sun Feb 26, 2006 11:11 pm Post subject: Yak-52 hydraulic lock? |
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Hello!
Me and my friend have been opertaing our Yak during wintertime now, operating the engine below 5 degrees Celsius, even down to -5. STarting the engine really hasn´t ben difficult, but have learned that you should not without pre-heating. We have drained for oil every 3 days without a flight, turning 20 blades before priming and another 10.
After the last flight at Saturday, we notice some oil dripping out of the exhaust imediatly after shut down.(maybe a teaspoon full)
That we didn´t like much! How common is this? May this be a sign of a minor hydraulic lock, with bent engine parts?
Please advise, and from only those serius guys!
Thanx!
Håvard N. Iversen
Televeien 14A
2020 skedsmokorset
mobil: +47 928 93 546
www.yaknorway.com
e-mail: haavard-iversen(at)c2i.net (haavard-iversen(at)c2i.net)
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pa3arw(at)euronet.nl
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| Posted: Mon Feb 27, 2006 5:58 am Post subject: Yak-52 hydraulic lock? |
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Dear Håvard,
I have never seen this with our Yak.
Do you run de engine at 60% for about 20 sec. before shutting down??
Hans Oortman
Van: owner-yak-list-server(at)matronics.com [mailto:owner-yak-list-server(at)matronics.com] Namens Håvard N. Iversen
Verzonden: maandag 27 februari 2006 8:09
Aan: yak-list(at)matronics.com
Onderwerp: Yak-52 hydraulic lock?
Hello!
Me and my friend have been opertaing our Yak during wintertime now, operating the engine below 5 degrees Celsius, even down to -5. STarting the engine really hasn´t ben difficult, but have learned that you should not without pre-heating. We have drained for oil every 3 days without a flight, turning 20 blades before priming and another 10.
After the last flight at Saturday, we notice some oil dripping out of the exhaust imediatly after shut down.(maybe a teaspoon full)
That we didn´t like much! How common is this? May this be a sign of a minor hydraulic lock, with bent engine parts?
Please advise, and from only those serius guys!
Thanx!
Håvard N. Iversen
Televeien 14A
2020 skedsmokorset
mobil: +47 928 93 546
www.yaknorway.com
e-mail: haavard-iversen(at)c2i.net (haavard-iversen(at)c2i.net)
I am using the free version of SPAMfighter for private users.
It has removed 421 spam emails to date.
Paying users do not have this message in their emails.
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| | - The Matronics Yak-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:
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cjpilot710(at)aol.com
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| Posted: Mon Feb 27, 2006 6:25 am Post subject: Yak-52 hydraulic lock? |
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Havard,
I do not think you have a real problem. I've seem my 1,200 hour M-14p do this on a number of occactions. It might be that the ring gaps on one piston have shifted around and line up, allowing some oil to seep by, or you may have a small leak in your induction system seal. Anyway a "tea spoon" of oil is not a big deal.
It sounds that you are taking good precaution during the pre-start which where bending a rod would happened.
There are a number of ways you can check to see if you've bent a rod but this little bit of oil is not (at least to me) not something to worry about.
Jim "Pappy" Goolsby
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viperdoc(at)mindspring.co
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| Posted: Mon Feb 27, 2006 1:38 pm Post subject: Yak-52 hydraulic lock? |
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The oil leaking from the exhaust after shutdown is not that uncommon. More than likely you shut down with the exhaust valve on one of the lower 3 cylinders open so that oil drained down and out the stack. I have the manifold drain kit installed, so it is not uncommon to see oil drain out when I open the stop cock after pushing the plane back into the hanger.
Doc
[quote] ---
| | - The Matronics Yak-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:
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