I've been fooling around with modding a Sperry artificial horizon. It's a MK.1B.
This is a real cool instrument. Here are some links that explain(better than I can) how it works.
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.
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.
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.