The hull shown in my pic is a design of my own making. It is a deep V hull and as such is not expected to rise onto the plane. Nevertheless I have included rubbing strakes in the belief that they will provide added directional stability. Time will tell !
When I was much younger I used to go windsurfing, and recall how the design of boards changed almost every year. Some time in the 1980s the equivalent of rubbing strakes were introduced, the object being to reduce or stop the board from sliding sideways across the water. At speed windsurfing boards would get onto the plane and would have this sliding tendency. The only component to counter this was the presence of one or more fins, plus the dagger board. However, when sailing before the wind the dagger board would be totally retracted, and this I guess is where the presence of rubbing strakes helped directional stability.
As to the arrangement of the rubbing strakes on my hull - to be honest, a complete guess. I have noticed that many different arrangements are used on model boats (three different ones on this post alone !)
This brings into question their very function. My guess would be:
1. To protect the bottom of the boat when grounding, and
2. To assist in lifting a hull onto the plane
in which case my use of them on a deep V hull is totally useless ! (So much for my qualities as a marine designer)
But, I have started so I will finish - the boat that is, and let you know how it performs. I have worked on the boat for two years now so please don't hold your breath !!😉
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