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richard.goode(at)russiana
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 Posted: Wed Jun 10, 2015 5:40 am Post subject: scavenging the engine before shutdown |
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One very good reason for running the engine at a minimum of 60% for 20 seconds before shutting down is that this will ensure that virtually all the excess oil inside the engine will be scavenged back to the oil tank, and this is the time that the oil level should be checked. So, when you return to next fly the aircraft, having made a note of the oil level, you can see how much the level has gone down, and by definition, that oil has migrated down into the engine, or possibly the cylinders!
Richard Goode Aerobatics
Rhodds Farm
Lyonshall
Hereford
HR5 3LW
Tel: +44 (0) 1544 340120
Fax: +44 (0) 1544 340129
www.russianaeros.com
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Ernie
Joined: 11 Jan 2006
Posts: 513
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| Posted: Wed Jun 10, 2015 5:45 am Post subject: scavenging the engine before shutdown |
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Hmmm,
That's a very good point. I never considered checking oil immediately after shutdown, and then subsequently prior to start and compare the difference.....
I will do that next time.
Ernie
On Wednesday, June 10, 2015, Richard Goode <richard.goode(at)russianaeros.com (richard.goode(at)russianaeros.com)> wrote:
[quote]
One very good reason for running the engine at a minimum of 60% for 20 seconds before shutting down is that this will ensure that virtually all the excess oil inside the engine will be scavenged back to the oil tank, and this is the time that the oil level should be checked. So, when you return to next fly the aircraft, having made a note of the oil level, you can see how much the level has gone down, and by definition, that oil has migrated down into the engine, or possibly the cylinders!
Richard Goode Aerobatics
Rhodds Farm
Lyonshall
Hereford
HR5 3LW
Tel: +44 (0) 1544 340120
Fax: +44 (0) 1544 340129
www.russianaeros.com
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wlannon(at)shaw.ca
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| Posted: Wed Jun 10, 2015 8:18 am Post subject: scavenging the engine before shutdown |
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Richard
Pretty much the same scavenge procedure I have used for at least 50 years starting with the Ranger engine, then the R985, R1340 and now the Ivchenko engines.
Specific RPM (I use 1400) for specific time (1 minute). Exactly the same each time allows an accurate assessment of oil consumption. One minute period also helps reduce shut-down cyl. temp. close to the max. recommended of 140 deg. C.
Walt
From: Richard Goode (richard.goode(at)russianaeros.com)
Sent: Wednesday, June 10, 2015 6:39 AM
To: yak-list(at)matronics.com (yak-list(at)matronics.com)
Subject: scavenging the engine before shutdown
One very good reason for running the engine at a minimum of 60% for 20 seconds before shutting down is that this will ensure that virtually all the excess oil inside the engine will be scavenged back to the oil tank, and this is the time that the oil level should be checked. So, when you return to next fly the aircraft, having made a note of the oil level, you can see how much the level has gone down, and by definition, that oil has migrated down into the engine, or possibly the cylinders!
Richard Goode Aerobatics
Rhodds Farm
Lyonshall
Hereford
HR5 3LW
Tel: +44 (0) 1544 340120
Fax: +44 (0) 1544 340129
www.russianaeros.com
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