Re: [TR] Quest

["David Brister" <david.brister@wanadoo.fr>]

If you just put a "floating ball" type or any other magnetic compass into 
your TR glovebox it will look quite smart but you can expect enormous 
heading errors in use. There are lots of DC electrical wires around and lots 
of "hard and soft" iron nearby which will affect the compass reading 
differently when facing in  varying directions.
If you intend to use the compass as a guide to the direction in which you 
are heading you must buy a compass capable of being compensated for these 
errors.
Simple compass adjustment is not a difficult job but can be quite time 
consuming. OTOH you can carry a simple compass in the glovebox and when you 
want to know the direction of anything you can take it out and use it away 
from the car!

David Brister
1967 TR4A (with a c. in the g/b)


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