(Kees Mies) wrote
My idea is to use thermals to climb (much)faster like gliders do.
Is this a stupid idea?

Not at all. Do it all the time in similar circumstances.

If my idea is not that stupid how do I find thermals and how to use
them properly?

Based on your registration, I assume you are German. Suggest you read
Cross Country Soaring (Streckensegelflug, I think - does that
translate correctly?) by Reichmann. It's probably overkill, but it's
a wonderfully comprehensive book that goes into a lot of depth about
soaring meteorology.

Once you have some idea of where and when you can expect lift, just
practice. A few flighs in a glider also wouldn't hurt.

Michael