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.

[Brock]

Do the LE's really need an airspeed indicator at all?  Is it mostly a reference for the max speed?  At slow speeds don't you mostly fly by the seat-of-the pants method?  My build is still a long ways from flying and I do for sure plan on having an airspeed indicator (just because) yet I'm curious as to how most of you flying use the info.

[Vf24renegade]

Youre basically right, however i need to do max performance takeoffs to see if i can get out of a short grass field. So i need to climb as steep as i can and of course i dont want to risk stalling so close to the ground

[Brock]

Hmmm, wonder if there is a light weight slow speed AOA indicator.  For STOL flying AOA can't be beat.

[Kamcoman77]

There is a tutorial on YouTube about a home built AOA that uses your smartphone as the screen. Really simple design. Look up "dan_der_flieger" I'm building one without all the 3D printed stuff. Uses an easy to get sensor and microcontroller.     The 4th version of this is the best

[Brock]

That looks like a fun project.  Let us know how well it works.