Fuel Quantity Gauge 6x

The fuel quantity gauges on the 707 are a bit tricky to convert to stepper motors since the have two needles very close together.  The main indicator needle turns less than 315° (which is the limit of the Juken X27 motor) and thus does not require

Rudder Pressure Gauge conversion

Bought a heavily damaged and corroded rudder pressure indicator on eBay and fully refurbished it with new GE328 5V bulbs and a new 2-inch housing. Let the photos speak for themselves. It has the standard Switec X27 stepper motor that uses its internal stop for resets.

Lufthansa had Collins Radio Altimeters installed on their B707 fleet (both A and B version). These are the most commons found on early jets built in the US. I found these in U/S condition on ebay and thus they were the perfect candidate for the simulator conversion. This Radio Altimeter

First engine gauges converted for simulator use. These EPR gauges now run on5V high resolution stepper motors used in the automobile industry. Integral lightning is still comes from the original 5V bulbs. Hardware to interface the gauges via LAN is in development and should be available in March.

I have

This is a very complex subject and I will be posting articles from time to time on how I do it. These are a couple of photos done recently. As you can see, I do not interface the gauges. I take the original gauge and remove everything behind the dial.