single handed racing 342 vs 370

Hallo from what I’ve been told 

Edited by Jojo - 01 May 2024 at 16:12

Jojo wrote: Hallo from what I’ve been told  The gap between the rudder and bottom is a big factor when the rudder stalls  The closer it is to the bottom the better  Then the surface is also a factor to keep it in laminar flow  As well as the profile is surely in its optimum speed range  But as the gap is still the most significant factor at this construction and fairly easy to modify to a better fit This I my gap on the original rudder and it works well  https://www.practical-sailor.com/boat-maintenance/building-a-faster-rudder

I find this very interesting and the article you link to underscores it. Thanks for sharing.

The gap in your picture is most likely to be even smaller. The rudder has a buoyancy and different locking rings on the rudder stock is in action when the boat is in the water or if is put on the hard. In your picture the boat is on the hard and the tiller head (which I just called a locking ring) is preventing the rudder to slip out of the boat onto the ground. When the boat is in the water it is the locking ring under the upper bearing that prevents the rudder to touch the hull whilst the tiller head only functions as the attatchment of the tiller to the the rudder stock.

Johan

Edited by Johan Hackman - 15 August 2025 at 21:40