Why don´t these figures match up?

[IvanK]

Originally Posted by jf1981

Hi

Possible, I noticed some variant of the Spit had completely false vertical speed indicator, I had to rely on altimeter for vertical speed tests of the current model. The gage was away from 25 to 50% depending upon altitude.

I do not think I have made any mistake, so the gage must be false. More people testing on those kind of issue should make for more consistency of those facts.

In the many climb tests I have done I have also found the RAF VSI overeading in the climb when compared with Altitude change versus time.