Mag Check in Flight

[Bob Cook]

BTW

Altitude is a consideration as there is much greater chance of crossfire while in "thin air". You can get carbon tracks on the inside of the cap, however, only way of proving this is by inspection. Once started it will only get worse.

Condensation in the mags can cause xfiring until sufficiently dried out. All the more reason to pre heat engine in the winter. Just need one carbon track to create a permanent problem requiring a cap replacement.

If not mistaken there is a greater chance of crossfiring due to load on the engine. A worn rotor can have an affect as well.

A bad capacitor will cause the points to pit and wear prematurely. I don't think a failed cap (open) would cause much change in the potential )voltage). A shorted cap......... dead mag.

bob