One of our staff sails on a Tanzer 22 and we developed this design when his boat needed a new rudder. The planform is based on the newer Tanzer 22 rudder, but 4″ deeper.
Overall length 59.5″. This would be a good upgrade if your boat is the fixed-keel version. Built to original 2.125″ head thickness but can also be built to 1.5″ to accommodate more easily obtained fittings.