It's absolutely possible.

The higher compression engines (like Super Tiger) do it more often, most sport engines with lower compression will have a hard time doing it, but it is possible.

(engines built for US use and the typical 5-15% nitro fuel have a lower compression ratio than those built for Europe and places where 0% fuel is more the norm).

Minn is right on, it's the methenol reacting with the platnum wire in the glow plug that keeps an engine running after the glow starter is removed, it can certainly start that way when warm.