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.

[Vf24renegade]

Sadly an aoa, one of the,best,safety devices is,also very very expensive. Dont know about light weight

[Kamcoman77]

Mine will cost about $50, not including a smartphone. I made an aerodynamic shape of balsa to hold the AS5600 sensor. The vane is also balsa. I'm mounting it on a short carbon fiber tube which will carry the signal into a small plastic project box mounted under the wing. The Arduino & battery will go in the box. I haven't completed the electronics, just the sensor and vane. Don't know when I'll try and complete it. Still working on plane.

[pappyadkins]

Hey I like that... could we make that into the "cross" brace on the jury strut??? I wasn't planning to use the cross brace part... but maybe on the that far side I could...  I have the stuff to make the vacuum kind, but this electronic kind is doable... OK - now my brain is rolling... Can we make an electronic airspeed indicator there too? Using something like this in the same pod....

https://rcdrone.top/products/pixhawk-px4-digital-airspeed-sensor-kit-differential-pitot-pitot-tube-air-speed-meter-for-pixhawk-autopilot-flight-controller?currency=USD&variant=44909919600864&utm_source=google&utm_medium=cpc&utm_campaign=Google%20Shopping&stkn=677f40c1dee9&gad_source=1&gad_campaignid=23741558110&gbraid=0AAAAADLxlRc2vZamqWBptuNcdMbpyWcWr&gclid=CjwKCAjw46HPBhAMEiwASZpLRFk6futcswKcTxBQAguhyeuyN7thtNtHzpwiikLYnrxq8xAnRxdIgBoCzo0QAvD_BwE

[Kamcoman77]

There are several RC airspeed items available. I bought the sensor and miniature pitot tube for the one I will make if I don't like the Hall Airspeed Indicator.