With the general progress away from flow based variometers (electric and
otherwise) where doing away with the problems of flasks seems
beneficial, surely the next step is to get rid of the flexible plastic
plumbing from the TE head on the fin LE to instrument panel. It can't
help to have the flexible plumbing moving during gusts and pull ups as
the movement can induce unhelpful volume changes in the line, albeit
that they might be small, which alters the signal. With power and data
wiring to the fin, the pressure transducer unit could sit in the fin in
a waterproof accessible location. Then the pressure transducer would
see raw data from the TE head better but then perhaps the signal
filtering may be more challenging. Or does the long plastic pneumatic
line act as a signal damper in a useful way?
Just a query for a slow Monday morning. Maybe someone out there has
attempted this approach?
Roger Druce
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