> These are accelerometer based in a sense.  If you had all three axis
> covered (they would have to be spring loaded) then you could as easily
> deal with a banking aircraft as you could with any other 3 axis
> accelerometer.  In other words, current accelerometers do not indicate
> angle with the earth either.

A 3-axis acc. will indicate vertical if it runs an algoruthm that
calculates the magnitude of the g vector. When g is off nominal g by 0.5%
or more then the readout goes invalid. This indicates vertical to 0.3
degrees or so.

Peter

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