I want to tell you about the performance of the four bladed Featherstream. To start with: I'm very happy with the prop. At 2000 revs the boat is about 0.2 kn faster than with the three bladed ******* ******** folding propeller. Furthermore the vibrations we had with the ******** have totally stopped. The prop really does a very good job. Kallisto Yachts will use it as standard on our new yachts.

Prof. Dr. Adrian Gaertner, Kallisto 56