Originally Posted by A Useless Geek
Do these graphs represent thrust somehow? Newtons or something?
No, and that is what we are used to seeing in prop testing results done here.
I think the assumption is that you want to know how many Watts it take to get it up to a certain RPM. .
It might help if I understood the spreadsheets (in German) better. Here is the data that is in one of the spreadsheets in a *.pdf document:
The document is called a Klappluftschrauben Vergleichstabelle and that means "Folding air screw comparison table".
But I could really use an explanation as to how to use the info there.