Semi Spade Rudder

◈   Problem

Gaps between semi-spade rudder and horn cause gap
cavitations, vibrations, damages, energy loss.

Different streaming angles cause sheet cavitaion.

Sharp edge cause sole cavitation.

◈   Solution

- Full Spade Rudder
- Twisted Leading Edge
- Remove all of sharp edge
- Costa Bulb
- Anti-Cavitation Coating