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Windmilling Prop & Vacuum Pump



 
 
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Old October 13th 04, 05:39 AM
Matt Young
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Default Windmilling Prop & Vacuum Pump

Ok, a curious question just popped in my mind. Say that one was flying
IFR in a piston single, maybe a 172 or 182. While enroute, either in
actual or above a cloud layer, the engine fails. Will the windmilling
prop keep the vacuum pump going enough to make the AI and DG usuable
during descent through the clouds, or will the gyros keep spinning fast
enough long enough to make the vacuum pump irrelevant?
 




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