Hello All

         Is there any reason that I can not submit a short length plug in an engine that is designed for a long length?  These engines will only used for sport flying.

                                                                         Tia,

                                                                          Frank McCune



                                                                           

You can, but you probably shouldn't, unless you are grounded until you can wangle some proper plugs.

If you are just doing straight and level-ish, then there isn't much risk. It won't do any damage to the engine.

But it will run cold because the plug element is buried in the head, and the compression will be slightly less. So if you have a choice of short plugs, run a hot one. (OS A3 aka #6).

Some engines may like it less than others. A Fox 35 on a profile doesn't sound good if you are going to try loops....

Divot McSlow

We had a young feller in the club that was sold a short glowplug for his Fox .35 stunt. It ran very badly, with one click between run and not run. Without the battery, we had no luck keeping it running. I stuck in a Thunderbolt long idle bar and it ran like most Fox .35 Stunts; mediocre.  Steve

Is "Fox Derangement Syndrome" a recognized disorder?  Who can forget their first Fox 35.  Have some respect!