Compasses are 180 degrees out

[bolox]

try this?
http://www.cixvfrclub.org.uk/downloa...%20Compass.pdf

so with the pic shown North is 80 deg clockwise from planes heading ie plane is heading 280.

in pic shown 'course setter' is North so to fly north turn right till the arm of the 'spider' with the cross on it is is pointing to the red N

[klem]

That's how you would normally set your course, set the graduated bezel to have the desired heading at 12 o'clock on the bezel/compass and turn until the cross-ended needle points to N (somewhere else around the bezel).

Conversely, to find out what heading you are actually flying turn the graduated bezel clockwise until N aligns with the (cross) end of the needle. Your heading is what now shows at the 12 0'clock position of the compass/bezel.

[effte]

Yup, it works. Mistaken on my part - didn't see the mag compass behind the stick so I assumed a flux valve of some sort. I'll go hide in shame now.

To make up for my rather hasty post, I checked whether there is gyro drift. There is, at around 15 deg/hour. Nice!