The Crossfell did work OK but the scaling was off, like it
never ever
showed more than 1 m/s

The Crossfell in my RS-15 (glider now sold) gave 32 years
of reliable service. The Crossfell was retired in perfect
working condition. There was a rotary switch
that changed the scale to 3x or 5x, I forget exactly which.
Yours may have been set or stuck in expanded scale.

Btw, mine read in feet per second. My mechanical backup was in
meters per second.
Meanwhile, over the radio everyone was talking about how many
knots of lift they were in. ;-)

and it would show down when I was going up.

Yeah, that's an indication that something was amiss.

--
Regards,
Doug


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