Tuesday, February 3, 2015
Chine ideas, round stern details,
Here's some sketches of my current thinking on my lower lifting Chines, spray strakes, and a round transom.
I use this reverse spray strake to direct the spray down. Small light skiffs do not need any lift from the middle of the skiff forward. You will have to use trim tabs to get the bow down so why have these lifting strakes there? In a solid glass bottom they do add some strength but at the cost of being wet.
Starting at the stern going forward my latest ideas on my bottom lifting - keel strake .
The added keel drawn could be added to the HBBWs Guide and 17.8 and others as they have enough vee to the bottom that will allow these mini keels to not drag.
Station # 2
Station # 3
I feel by softening the inner chine it will keep the water flowing closer to the hull and that will
Get it to be directed downward and lower. Do this starting at the helmsman seat. Aft you need sharp edges to get speed and planning ability. All the spray there is going away from you.
A free hand sketch of how this really round transom will work. The bottom stern edge is straight but all above is really very round and soft. I do not like trim tab pockets as too much work . These reverse outty Pockets will be easy for installation as they can fit all kinds of trim tabs and sizes.
Lots of lines , and angles here. Hope you can see what's happening here.
In reality it's all very simple but on paper its a lot of lines. To remove the boat hull from the mold you will pull the hull out like taking off a shoe. The only thing is the stern sheer flange downturn will not be there to stop the hull. This is no big deal as it will be under the deck flange.
Hope this helps in thinking of different ways of getting rid that damn spray and making for a quiet stern for the purists out there.