As an active builder of a Jodel D-18,designed around the VW ,I have
some questions ,if you don't mind.
It would seem they fly fine on 40-50hp,maybe less in Great Britain
where they restrict revs.Some are promoting the type IV as a more
reliable choice. What hp do you believe the type IV can produce,using
your given reliability constraints? Could you estimate the installed
weight differences between the installations? And,lastly, which would
you feel more comfortable behind?

John G