Hall wind meter error

[Vf24renegade]

My hall meter consistently reads about 20mph low. I have it on the jury strut like other people. Any thoughts?

[Kamcoman77]

If mine was off that much I would try and take the top off. Then I would wipe down the rod and try to clean the floater hole, maybe with soap & water. I might even try some dry lube on the rod, just wiping mostly off with a diaper or lint free paper towel.

[Vf24renegade]

Its brand new. And i tested it out the car window which gave a correct reading. Thanks for the pictures, ill see if i cant get some and try it

[Kamcoman77]

If it tested OK out the car window, your air entry angle must be slightly off on the plane. Have you already tried turning it in various directions?

[Vf24renegade]

Not yet. I do have to do further testing.i was wondering if anyone else has seen this and had some probable causes. Thanks.

[Chuck in Indiana]

Mine is remarkably (to me) accurate. Mounted on the right jury strut.