In the "olden days" when glow plug selection at the average hobbyshop wasn't as broad as it is today, the majority of us running baffled piston engines with air bleed carbs were pretty much forced to use idle bar plugs if we wanted an idle that was reliable below 3k rpm.

With today's selection of non idle bar plugs of various heat ranges and heat persistence, things might very well be different. But that is now and it does none of us any good back in the "olden days".

You can believe that when I made the transition from control line to R/C in the late sixties, I tried various non idle bar plugs that I had left over from C/L flying. None of them performed as reliably as the Fox idle bar plug. However, I was limited to only two or three brands of non idle bar plugs, as were most modelers. It is possible that some non idle bar plug could have performed as well, but I never stumbled across it.


Ed Cregger