The stabiizers are becoming quite scarce, but you can't have a complete system without one. They used to be inexpensive, but as demand has gone up and availability down, the prices have risen significantly. Fortunately, most of these can be restored to working condition. Here is a comparison between a typical stabilizer and a mint condition one:
And here is a picture of a stabilizer disassembled for restoration:
Will post more photographs as the restoration proceeds.
The original wrinkle coat paint is difficult to reproduce. It was supposedly used to avoid glare from sunlight reflecting off of the bombsight. Here is our stabilizer out of the paint shop:
Gyro is installed. Now begins the process of re-wiring the stabilizer. The military often cut all of the internal wiring to disable many of its devices when they were no longer in use.
Gyro Up and Running
The wiring is now complete. The gyro and the erecting system with servo motor are now working for the first time in over 75 years. As you manually turn the large geared ring at the top, the gyro will tend to precess up or down, and the erection system works perfectly to correct this.
The clutches (autopilot, bombsight, and drift gear) have all been attached and adjusted to the correct tensions. The stabilizer now works exactly as intended 75 years ago
Since the last post, I have restored another Sperry S-1, a Sperry T-1, and a Wimperis Mark IXc. You can see videos of these under "Other USAAF Bombsights". Here is a set of before and after pictures of the Wimperis:
Here is a brief tour of the workshop, with works in progress as well as completed projects:</h3
Here is a complete system going to a museum in Tennessee:
And here is another complete system going to a collector in France: