Started spending some time looking at this spark plug. By using the good all “Google” I found that this was a Champion C26. Some history:
1920s – 1930s :
- Champion began development of spark plugs specifically for aviation industry.
- Champion Aero-1 plugs sparked world’s speed record (318 mph) and world’s altitude record (38,793).
- Champion spark plugs helped power Aeronca Dowager, first successful U.S. light plane.
- Created Aero RA, a low-profile spark plug with radio dome shield.
- Expanded facilities for ceramic research.
- Pioneered the C-26 spark plug.
- Developed industry’s first aluminum oxide insulator.
So I am looking for a replacement of this spark plug. Trying to understand what parameters are important for finding the right replacement. And then there are the ignition leads. Do I use just plain old copper, compression leads or shielded leads……