Any outboard rudder system which uses pintles and gudgeons is inherently weak. Be sure your
design tries to address the loads which will be placed on the system.
.
This is the area which failed on version 1. The original gudgeons were fastened directly
onto the white plywood piece at the front of the cassette, without the stainless tangs. They broke immediately.
.
The improvements in version 2 are
the addition of the triangular piece of wood on the front of the cassette
wrapping the top and bottom of the cassette in fiberglass (see previous
picture)
the bent stainless tangs which wrap around the outside and bolted onto
the cassette