I have a Kestrel 4000 and from the beginning when I got it I doubted it was accurate. Comparing it to my Skywatchers 4 at the time it always seemed to under read the wind but quite a bit. I thought at the time it mush have been the cheaper skywatchers at fault....I believe I was wrong.
Like I said I have suspecte this for a while now as nearly all my misses on windy days are always down wind too.
Last night really got me thinking, I was out shooting steel and as normal measured the wind, Kestrel said it was between 8 and 12 mph, I thought then it seemed a bit slow as it felt more like 15 mph from experience. The results on steel resulted in twice they wind speed adjustments needed, i ended up dialing for a 16mph wind!
One thing I have noticed again since new, is the impeller on the Kestrel is noisey it seem like it rattles when picking up speed, it can really only rattle on the outer side walls of the impeller casing, this obviously would slow the impeller down.
Is anyone else's Kestrel noisy when operating (spinning)?