I've been working on the fuel cell's enclosure again. Ever since I made the decision to locate the fuel cell in the cabin under the bed I've been concerned about a few issues like.... how will I design the enclosure..? how will it balance and support the weight (approx. 160 + pounds full of fuel) as well as the weight of two people in the cabin (on top of the fuel cell) and so on..?
I designed the box some time back using 3/8" plywood but, still have been concerned about the weight factors. I've needed to create something to support this weight without causing any undue stress. I've been considering how the cabin floor is supported but, can not see enough room in the bilge to utilize braces in the same manner. I do need to spread this weight out as much a possible though.
I came up with what I refer to as a bridge.
The idea is to spread out as much of the weight as possible across the keel itself (the strongest element in the bilge at this point in the boat).
It's designed to attach directly under the fuel cell's box and sit directly
on the keel.
The fuel cell is 47" long and 18" wide. It is supported and enclosed by it's box which "hangs" from and between the first and second bulkhead in the cabin.
The bridge is approx. 27" long and 6" wide on top.
The center of the bridge itself is constructed of one piece of 3/4" mahogany in the center, sandwiched by two pieces of 3/4" plywood. The top and bottom are 3/8" ply... the bottom piece being just wide enough to cover the width of the keel while the top piece being a bit wider will support the the weight being transferred through the bottom of the box. The plywood on the bottom of the bridge (being softer than the keel) will eventually compress if it is stressed... sort of "adjusting" or "seating" itself, at least this is how I imagine it to work.
In this picture you can see the bridge sitting in it's position on the keel. The piece of 1" x 2" was used to check clearance across the entire length of the box... It fit really... really good !
This should work very well.
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