GarandOwner
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- Joined
- May 23, 2012
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My 38' Cub with a Continental A75 typically only has an indicated airspeed of 55-60 MPH which is slow even for a Cub. I noticed the airspeed indicator is slow to come alive on the take off roll so I decided to make a simple manometer to check the accuracy of the airspeed indicator across the flight envelope. I measured the height difference of distilled water when the Airspeed indicator showed in 5-10 mph increments; I found that mine reads on average 10mph under what the true airspeed is.
I will check it a few more times (and have my wife do the same) to see if the results are repeatable and reproducible. But it makes since that even with my shallow 36" pitch prop I get such a low IAS.
May be time to get the ol' airspeed indicator overhauled.
I will check it a few more times (and have my wife do the same) to see if the results are repeatable and reproducible. But it makes since that even with my shallow 36" pitch prop I get such a low IAS.
May be time to get the ol' airspeed indicator overhauled.
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