What size rudder blade do I need?

The main factors influencing the required rudder size are the type of vessel, vessel dimensions and speed of a vessel Teignbridge propellers use a selection of calculations to accurately determine a required rudder area.  

What configuration of rudder do I need?

Their are two main popular types of rudder configurations – Inboard rudders which are entirely under the hull and transom hung rudders which are mounted on the stern of the boat. There are advantages to both types. Inboard rudders are more efficient and are less prone to ventilation. Transom hung rudders allow the propeller to be mounted further aft which could allow the shaft angle to be reduced for increased propeller efficiency. They can also provide some space saving within the hull and are easier to fit and maintain.