On Friday, February 8, 2013 3:35:32 PM UTC-5, rk wrote:

SR is only variometer that can show what is happening when you blaze trough thermal at 200kph.

I have nothing to dispute. I just want to learn something.

I see that the ability to get an accurate reading at high horizontal velocity is a feature that distinguishes the best varios from the lesser varios. At what speed do lesser varios start to degrade? Is the degradation abrupt or gradual? Specific examples would be helpful.

Is there any other criteria where one modern vario is clearly better than another?