We used a traditional fixed three blades propeller calculated for the boat. She was finally noisy and made cavitations.

SPW offered a calculation, considerated our troubles and looked to our program.
We installed a VARIFOLD 4 blades with smaller radius, folding, with a
new blade design and built in high strength NIBRAL Alloy material. Which is much stronger and especially for ice regions certificated.

No more noises, vibrations, soft running, Makoré passed from 6,5 knt to 7,3 at cruising speed, and was much more powerful at acceleration. We sailed Gota canal, all swedish coat, Norway and Svalbard. That means hours and hours of motoring.

Thousand thanks to SPW!

Fabrice and Isabelle onboard Makoré II