thanks
from your link:
The K.B.B. Rate of Climb Indicator
Mark IB* is a simple means of measuring
the rate of change of atmospheric pressure
due to change in altitude of the
aircraft in which the instrument is fitted
as i predicted this scienpriests went for the obvious path
do you know what turbulences are?
sub and overpresures, they happen all the time so the climbing indicator goes crazy
the elemental way to fix this flaw is to link airspeed and angle of climb to have a precise climbing rate reading
edit:
its an edicated guess wflying really low the altitude gauge can even read negative :O