D10A Winds Aloft Wrong

[Johnpmarriott]

My Dynon D10A EFIS Winds Aloft are innacurate. I've changed the temperature input to the highest and lowest limit but it makes no difference.

Any suggestions please?
John

 

[dynonsupport]

A good magnetic calibration is critical to winds aloft. Have you double checked that it basically has no error? Just a degree or two will be much larger than any OAT error can cause.

Remember, it's doing the same calculation you would do on an E6B, so the same elements matter. Airspeed, Ground Speed, Magnetic Heading and Ground Track.

 

[Johnpmarriott]

Thanks support.

I'm familiar with doing a compass swing, coefficient A, B and C but all I could find in the instruction manual was to put the aircraft on each cardinal heading and press a calibration button - I guessed was the modern version of the compass swing?

Regards, John