I've been fooling around with modding a Sperry artificial horizon.  It's a MK.1B.

http://simhardware.org//img/artificial%20horizon15sep04_01.jpg 

This is a real cool instrument.  Here are some links that explain(better than I can) how it works. 

http://www.fathom.com/course/10701016/session2.html

http://simhardware.org//img/artificial_horizon_cad.jpg 

I've been trying to photo the real instrument, but it's a bear with all the black parts.  So I'll save you having to look at my bad photography.  I've made a couple of movies of a CAD model I'm working on to show the basic action of the works and my mod for the roll axis.

This is the gimbel which holds the gyro(not drawn). http://simhardware.org//img/Artificial_Horizon.avi

This is my servo driven gear mechanism that drives the gimbal in the roll axis.  I drives a friction wheel(from old stereo turntable) that rolls on the inside of the housing.

http://simhardware.org//img/Artificial_Horizon_2.avi

I've made the roll mechanism and tested it.  I drove the servo from my laptop and it looked pretty cool. 

I'll post further results when I get further along. 

P8 Compass

Another directional gyro has been obtained, this gyro is from an instrument trainer and has a geared electric motor. It is hoped this unit can be used in the simulator.

Also obtained were a switch and some terminal blocks. 

 One of the hardest instruments to find for the Spitfire panel is the Nose up/Down indicator.

Following a very kind offer of help with information,  i have started to make the Nose up/Down indicator.