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