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#1
March 10th 15, 07:41 PM
posted to rec.aviation.piloting
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Burning oil
Why do reciprocal engines burn so much oil?
I've always wanted to know... -- Dallas THE AGMSFS GROUP HAS MOVED AWAY TO: http://forums.delphiforums.com/flightsimulator/start 
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#2
March 11th 15, 06:58 AM
posted to rec.aviation.piloting
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Burning oil
My understanding is that the increased clearance between cylinders and pistons required to accommodate the thermal expansion of air-cooled IC engines results in excessive oil consumption. But I'm no certified mechanic... On Tue, 10 Mar 2015 19:41:43 +0000 (UTC), Dallas wrote: Why do reciprocal engines burn so much oil? I've always wanted to know...
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#3
March 11th 15, 08:45 PM
posted to rec.aviation.piloting
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Burning oil
On 11/03/2015 7:58 p.m., Larry Dighera wrote:
My understanding is that the increased clearance between cylinders and pistons required to accommodate the thermal expansion of air-cooled IC engines results in excessive oil consumption. But I'm no certified mechanic... On Tue, 10 Mar 2015 19:41:43 +0000 (UTC), Dallas wrote: Why do reciprocal engines burn so much oil? I've always wanted to know... And then there's the dry sumps systems
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#4
March 14th 15, 05:09 PM
posted to rec.aviation.piloting
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Burning oil
Larry Dighera wrote:
My understanding is that the increased clearance between cylinders and pistons required to accommodate the thermal expansion of air-cooled IC engines results in excessive oil consumption. But I'm no certified mechanic... Sounds pretty reasonable to me. -- Dallas THE AGMSFS GROUP HAS MOVED AWAY TO: http://forums.delphiforums.com/flightsimulator/start
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#5
March 20th 15, 10:31 PM
posted to rec.aviation.piloting
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Burning oil
On 3/10/2015 2:41 PM, Dallas wrote:
Why do reciprocal engines burn so much oil? I've always wanted to know... It's mostly air-cooled recips that burn the oil. The temp range experienced by an air cooled cylinder is large; the piston is aluminum alloy, the cylinder steel. Aluminum expands more with temperature than steel, so a sufficient gap between piston and cylinder is needed when cool to avoid jamming when hot. Brian Whatcott Altus OK
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#6
March 22nd 15, 05:27 AM
posted to rec.aviation.piloting
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Burning oil
Brian Whatcott wrote:
The temp range experienced by an air cooled cylinder is large; the piston is aluminum alloy, the cylinder steel. Thanks for confirming. -- Dallas
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