top of page

CK-40
(Go-Fast Boat)

CowboyKiller01.png
For this project I designed a boat of my choice. I chose to do a go-fast boat. Throughout class we touched on stepped hulls but didn't go into depth. I decided to do a stepped hull to learn how to design and how a stepped hull works. 
CowboyKillerP4_LinesPlanRevIStep11_4-14-24JPEG.jpg
My first task was to develop a hull and create lines plans. After dozens of designs and tweaks I decided on the hull above. I initially designed a hull and ran a CFD report to get a baseline. After the baseline I began cutting the steps into the hull. I ran several more CFD simulations on these hulls to get the optimum hull. Below I included a picture of the CFD report. This displays the waterplane area of the stepped hull at 90Knts.
CowboyKiller03.png
CowboyKiller02.png
After I selected a hull, I began laying out the structure of the boat and calculating laminate thickness. I elected to use ABS building standards on my boat. I calculated the hull thickness the boat as well as stringer/frame spacings. I began with placing the engines and drive units. The engine mounts determined the stringer spacing. The bulkheads were in specific locations. Starting at the front, the first bulkhead is a collision bulkhead. The second was calculated to be needed to support the span between bulkhead 1 and bulkhead 3. Bulkhead 3 was placed at the companion way. Bulkhead 4 was placed at the front of the engine room. This one is thicker to allow for fire protection and noise dampening.  
bottom of page