This is an example of the cross section of all blades
Rudder Blade: Lighter, yet Durable The Dotan rudder blade's manufacturing process with high pressure and thermal stress is more efficient than vacuum technologies many times over.
The Dotan rudder blade also differs from other sailboat blades in that it is structured with special developed anti-vibrator ribs and reinforcing longeron inside the blade. This atypical structure gives the blade extraordinary strength and totally eliminates vibration. The Dotan rudder blade is made of directed glass material1, ensuring high durability at small weight.
Blade Shape: NACA and STEINER Hydrodynamic Profile The Dotan rudder blade's profile is designed on the basis of the NACA 0009 hydrodynamic profile (National Advisory Committee for Aeronautics)2 and the STEINER hydrodynamic profile. The Dotan rudder blade's shape minimizes wave and inductive resistance.
Dotan's conceptually brilliant rudder mechanism enables you to set the blade with a simple flick of the wrist.
Rudder Box: Constructed of Non-Corrosive
Incomparably strong and matchlessly durable, using non-corrosive, composite materials which make the Dotan rudder box more steadier against dynamic loadings than aluminum boxes.
Blade Shape: NACA Hydrodynamic Profile
The Dotan rudder blade's profile is designed on the basis of the NACA 0009 hydrodynamic profile (National Advisory Committee for Aeronautics). The Dotan rudder blade's shape minimizes wave and inductive resistance.
Encountering obstacles
When hitting underwater obstacles such as rocks, sandbanks, jellyfish, etc., the blade automatically kicks up.
Warranty
Your Dotan rudder system comes with a 3-year limited warranty for the rudder box and with a 2-year limited warranty for the blade. The rudder box for Optimists has a 10-year limited warranty.