I'm having some problems with the glow plug connectors on my AMT engines. I'm not sure what brand they are. The are brass and they have a hole that fits over the ball on the glow plug, with a little detent ball that is supposed to hold them onto the glow plug head. Problem is the balls on the Rossi glowplugs are really inconsistent. I've measured them from .065" to .130". Despite this problem, the Rossis seem to hold up better than some of the others. Are there better glow plug connectors out there?

I believe you've found the best plug.. the Rossi glow elements are even made of a slightly heavier gage that seem to allow them to last longer. NOTE: I've found the glow plug voltage needs to be tweaked some for proper bright glow.
Now as for the plug connector itself I've have only used the type that comes standard on the JetCat.. they hold on to the Rossi plug very good. Example plug connector out in the airflow no problems on my BobCat.
Lee H. DeMary
AMA 36099

Lee,

Thanks. I fixed the problem with a couple of really small alligator clips. I soldered them to the plug leads and used some large heat shrink tubing to insulate them from the engine case. They hold really tight. I couldn't pull them off with my fingers. And they hold no matter what size the connector ball on the plug happens to be. BTW, the problem was not in the functioning of the plug. The R8's have lasted through many starts and hours of flight time. I agree that the Rossi plugs seem to hold up far better than others.