CFD
Maximum speed: 21.5 knots
Resistance reduction:
1.3% at 5.0 knots
13.7% at 12.5 knots
15.3% at 17.5 knots
11.1% at 22.5 knots
Interesting fact
In designing the Hull Vane®, many boundary conditions were taken into account, like the RHIB launch and recovery through the transom door. Several papers have been presented on this research, which are available here, and here, highlighting a.o. the positive effect on helicopter landings.