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Carb heat = no rpm drop



 
 
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Old October 8th 05, 05:21 PM
figurado figurado is offline
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First recorded activity by AviationBanter: Sep 2005
Posts: 5
Default Carb heat = no rpm drop

I just bought a 1973 Cessna 172. During runup at 1700 rpm there seems to be no noticeable drop in rpm when carb heat is applied. We inspected the operation of the cable, and flapper and inspected the box and everything looked fine. We inspected the ducting for blockage and found nothing. What might explain this? Thanks in advance for your help.
 




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