Back to Day 26 - Mar. 29th 2012
Time to build the hatch. I hate this part because I don't know exactly what I'm doing so I'm just doing guess work. Have patience with me if I make a mistake.
First, to make the ribs (sorry I don't have pictures for that step... I forgot about the camera when I did this), I got a 4'x4' piece of 3/4" birch plywood and got it next to the wall, at back, where the wall is curved and I traced the curvature of the walls with a pencil. Then I cut along the curve with the jigsaw. When one cut was done, I traced another line about 2" from the cut, parallel with the cut, to make the shape of the rib. I used the jigsaw again to cut the rib. When the ribs were cut, I clamped them to the wall and with a belt sander I sanded the edges to make sure the side walls and the ribs are the same.
I made 2 ribs from 3/4" birch plywood.
I clamped some 1/4" dowels between the side walls and the ribs to measure the distance between the two ribs. I'll need this measurement to cut the horizontal beams that make the top and bottom of the hatch.
The bottom horizontal beam in place. I have the 1/4" dowels under it.
Two older, uglier ribs that I made before will be part of the hatch too.
Few beams connected to the ribs to make the hatch stronger.
I'm glad I'm done with this part.