On the diesel forum, some discussion has been going on about fuel mixes and the like. One aspect was the installation of a glow plug into a diesel head to try and improve combustion with no ether fuels.

At the same time, I did up a head that could be adjusted for compression, on the fly. That is, while the engine is running.

This was on a Norvel .15 and likely could only be done on that engine but if anyone else has done such a thing I'd be interested in any input.

The run can be seen here. http://www.youtube.com/watch?v=_pN6-rgXEFk

The thread in question, here. http://www.rcuniverse.com/forum/m_4561055/tm.htm

Also, for those with the skills, tools, inclination and need, you can see how to adapt for turbo plugs here. http://www.rcuniverse.com/forum/m_45..._1/key_/tm.htm