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Old 16th May 2017, 01:37
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megan
 
Join Date: Mar 2005
Location: N/A
Posts: 2,911
Had the experience once of flying in the uprising air in front of a cold front in a 172 following refuelling to "full". Level flight, throttle at idle and at Vne, with fuel continually venting from the vent behind the left strut. Can't comment on the 172 system, but see from my book shelf that other high wing Cessnas vent through both the fuel cap and a check valve on the vent line.
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