Hi Chris - Clearly you need our compass option ;-)
Give a call over the weekend to discuss your issue,
and also to tell me where you've located such a long ridge,
Best Regards, Dave "YO"

(Chris OCallaghan) wrote in message . com...
Dave,

Posting to the group in hopes you answer might serve others...

My SN-10B serves me well. However, I am having a small problem based
on airspeed error. I have noted on ridge flights that after prolonged
high-speed flight without turns, the instrument starts counting up the
wind speed. On one leg, I saw a 25 knot increase. Clearly I need to
fix the asi error table, but if the SN-10 is counting up, which way do
I need to go in the table?

OC