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#1
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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#2
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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