-fila is a wide boat, meaning that the rudder will go out of the water under heel, so the rudder has to be long(17cm)
-it is relatively light(little momentum), so the overhang behing the rudder shaft has to be great, to swing the boat into tacks
-it has lots of sails(sa/weight is high) same as above
-it was to be a race boat, control was key, avoiding stall= fat naca 0010 profile(no laminar separation bubbles luckily)
So the rudder for fila was designed and build in glassfibre with a wood core. It gave great results, the boat tacked well, the bow could go down and control wasn't lost, queueuing was good etc.
So with the 3d printer i decided to build another one for the evolution boat.
I was printed at a high resolution in 7 hours(still less than waiting for epoxy to cure)
2 more hours went into sanding and gluing it together.
It is printed of pla plastic, glued together with super glue. The shaft is 3mm brass tube.
Weight is 35g, not light but for a " prototype" it is ok.
It is finished with 5 coats of spray paint. In the future car paint will be used.