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klwerner(at)comcast.net
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 Posted: Sun Jul 02, 2006 6:53 am Post subject: Oil consumption |
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Not if you have a 12qt system in that 300hp, and then burn roughly 1qt/hr.? Or do you have enough fuel for a ~12hr. long flight?
do not archive
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Jim Baker
Joined: 30 Mar 2006
Posts: 181
Location: Sayre, PA
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| Posted: Sun Jul 02, 2006 8:58 am Post subject: Oil consumption |
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There is, of course, a minimum specified oil quantity as well. Not
going to run it till all the oil is gone. As for my 300hp engine, if I
were to fill to the 12 qt line the first 4 quarts would get dumped
overboard pronto and settle at 8 qts.
[quote] Not if you have a 12qt system in that 300hp, and then burn roughly 1qt/hr.? Or do you have
enough fuel for a ~12hr. longflight?
do not archive
---
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klwerner(at)comcast.net
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| Posted: Sun Jul 02, 2006 9:19 am Post subject: Oil consumption |
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And then you still have 8hrs. until the seizing of the engine...
Why do they make it 12qts anyway if it can't hold it in the first place, but pukes oil until its down to 8qts?
[quote] ---
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cubflyr(at)comcast.net
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| Posted: Sun Jul 02, 2006 10:05 am Post subject: Oil consumption |
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> Why do they make it 12qts anyway if it can't hold it in the first place, but pukes oil until its down to 8qts?
| Quote: | | Good question. Like the O-320/360 series with an 8 quart sump on an engine that works best at 6. |
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Jim Baker
Joined: 30 Mar 2006
Posts: 181
Location: Sayre, PA
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| Posted: Sun Jul 02, 2006 10:05 am Post subject: Oil consumption |
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| Quote: | And then you still have 8hrs. until the seizing of the engine...
Why do they make it 12qts anyway if it can't hold it in the first place, but pukes oil until its down
to 8qts?
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I've never seen an engine that didn't have it's own oil-level
comfort zone. Some are more, some are less. The 12 qts was
ostensibly for oil cooling of the engine, expecting that the greater
oil surface area would dissipate more heat through the case
walls, oil cooler, and oil pan, from the piston crowns and,
marginally, from cylinder barrels. I've seen some that were
happy with 9qts, some with 10, and rarely some with 12.
Sometimes the same engine model in the same type aircraft had
a different quantity level...go figure.
Jim Baker
580.788.2779
Elmore City, OK
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