Wednesday, 11 November 2009
Cheek block is bolted to a backing plate which is attached to the side of the control line slot
!0 bolts are neede for the plate.The bolts are pushed through from the inner side, and the heads buried in epoxy putty.
I thought I would make some of the simpler Aluminium parts myself. I have had to buy some large blacksmiths drills and some hole-saws to make these parts, but they will also be needed later on to drill matching holes in the hull and beambulkhead flanges.etc
Drilling Aluminium is easier than I thought, even 12mm plate was not too difficult. I already have a small pillar drill which seems up to the task. The cutting and shaping I have had to do is on a small band saw with a bi-metal blade.It is slow going to cut but still easily possible. A bench sander also rounds of corners and edges very easily.
These parts are for the kick- up rudder box. The 4 large holes will have a plastic bush fitted and then a 16mm bolt. Plans specify a 16mm ID by 19mm OD plastic bush, but I found that from Igus GMBH (suplies acetal bushes as used in folding system) that they only have 16mm ID by 18mm OD. So I have drilled 18mm hole and not 19mm. (Could be worth checking that you can get the bush specified Before drilling hole!)
These are the beam bolt backing pads for the folding system - made from 12mm Aluminium plate.