Scott if you want to do deisel in a trainer which I assume you are talking about because you posted in the beginners forum, then you are in luck as there are many options now with throttled deisels and deisel conversions. Some of these would work very well in a number of smaller trainers. I would suggest you peruse the the Deisel section of the engine forum here. Also some more info about you would be helpful and just what you wanted to do. A deisel may not be a great idea if you are just starting out in that it may may limit your choice of appropriate airplanes.

John