Gemin wrote 'would a cheap car or yacht compass do - they also have
attitude indication...'
Unfortunately, what applies to a vehicle moving in (more or less) 2
dimensions doesn't apply to one moving in 3. In particular, an instrument
that relies on gravity to give attitude information MUSTN'T be used in
an aircraft (that's why we use gyros). Consider this - an aircraft flown
in balance can be looped with a glass of water on the panel not spilling
a drop! And this is the reason why instruments are needed for flying in
bad visibility - what you feel subjectively doesn't relate to what the
aircraft is actually doing.
Happy landings!...John.
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John Ellerington
SuperMIX Project team
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