See full version: Best ways to make watertight hatches
My plan is to rip something like 1 inch strips of the 3/8 plywood and glue them down around the openings as the combing. Them make the hatch 1 inch wider then the combing area and put the same strips on the under side of the hatch add a foam strip on the top of the deck combing. No hinges. I plan on cutting slots into the deck them fish cam starps through the slot and epoxy the ends under the deck. here
I am in the process of installing a deck and hatches now. I was looking at 1/4 and decided it was too light. So, yesterday I got 3 sheet of 3/8 and I will start today. more
Please keep in touch and let me know what your plans are. I have 8 weeks to get this done and still have a little time to make adjustments.
So are you building a whitewater dory too? I'll try to attach a pic of what I have done so far on mine. I live in Victor, Idaho (Teton valley , by the way.
The best way to make two identical parts is to sandwich two sheets of wood under the template and cut through the stack. Two issues emerge: more
There are a few other less important points that should line up, such as the inner front edge and the lines drawn for the #1 bulkhead. [links]
The last thing to do is to trim mortises and the internal areas as mentioned earlier. Once all done you should have a set of parts like in the picture above. here
Secure the sheets to the board with a method suitable for the type of building board you're using - it can be pins, tape, weights etc. [links]
They also facilitate storage of different types of cargo at the same time. Incase there is a fire, they prevent the source of fire or the flame to pass over to other compartment. They increase the overall strength of the ship by increasing the transverse strength.The number of bulkheads depends on the length of the ship and arrangement of machinery. It is imperative for all the ships to have a collison bulkhead
The stern tube should be enclosed in a separate water tight compartment. This compartment can be formed by aftpeak bulkhead and stern frame.All these bulkheads can withstand full head pressure. This is generally done by keeping the bottom thickness of the bulkheads greater than that of the top
The walls of the ship serve a variety of functions. The main reason for the formation of bulkheads is to create compartments which can be used for storing cargos or creating accommodation spaces. It’s believed that Chinese were the first people who started using bulkheads in their ships. Prior to that the whole hull of the ship used to be an open space. Not only that, bulkheads provide structural stability and rigidity to the ships. They also minimizes the violent sheer forces acting on the ship, that are generated due to waves. Moreover bulkheads are also useful from safety point of view. They prevent water from entering different parts of the ship in case there is flooding.Let’s take a look at the basic bulkhead designs.
Maybe you'd like Russell Brown's nifty little hatches? more
"It was a Sunday morning and Goddard gave thanks that there were still places where one could worship in temples not made by human hands." -- L. F. Herreshoff (The Compleat Cruiser)
Actually, testing wouldn't be that difficult: build a plywood box, install door, fill box with water, knock box around viciously and see what happens. [links]
First, the bulkheads don't exist yet, so they can be designed however I want. I'm thinking one bulkhead under the bridge deck, essentially sealing up the engine compartment (which has no engine in it.) I'd like one access hatch behind the companionway ladder which would give me access to the area for storage. There is loads of space under the cockpit, so using the forward part of it for storage won't compromise buoyancy in that area. here