Hi all, and thank you for your helpful answers.

The engine was used when I bought it, and has obsiously seen some running.
I could see the prop was flexing, and would not consider using that one any more. It was just lying in my hobby room when I needed it.

I found and downloaded the Bluepants drawing, which seems a quick and nice build. Maybe this is the right one for me.

To me using a diesel is a point in itself. I have most kinds of R/C Aircraft, which by now is either glow, gas or electric.
Just smelling and listening to the DA told me to follow this path until I get a plane in the air.

I'll do so some more test runs while I am building a plane for it, but I feel that this engine is up to the job.

Helge.