While waiting for the AL sheets to arrive I made the 235-ton hook block. I had very little (none!) information to help me and I had to somehow get some measurements from pictures. And now it’s finished I think it is not quite right. I might change the whole thing again.
I also made a first mock-up of the boom, just to try out if it works. I am using 0.032” Al sheet. I bend the lower part and the upper part separately and then glued the two together. It seems to work and it is quite strong.
Kerst