Varnish patching first thing each morning on the repairs to the cockpit seats and locker fronts:-
|Starboard locker fronts|
Each slat is machined to 1/2" thickness and spaced 3/4" apart.
Once cut, they're all removed and sealed with CPES to prevent mould growth under the seat squabs. For the final fitting each slat will be stapled to two strips of webbing underneath and every 10th slat screwed to the supports.
Running out of "light" jobs, thoughts turn to the chainplates.
These need to be bolted through the planking and frames (or backing plates for the aft pair). This issue here is that the frames are relatively narrow and the planking lies at an angle at the outer face. Hole drilled from outside through and perpendicular to the planking could run out too far toward the inside face of the frame. Therefore the holes need to be started forward of the centreline of the frame - the question is how far forward...
The safest solution seems to be make a mock-up of the plank/frame structure, replicating the angles and dimensions:
Judging by the results, it seems feasible, but tight. Need to decide what diameter bolt now. Clearly the thinner the bolt the more wiggle room but less strength, the reverse for thicker ones. The mock-up shows 9.5mm or 3/8", which is the size of the bolts removed, but I'm wondering if 5/16" is OK or even perhaps as little as 1/4"?
I am thinking that since I have re-cast the chainplates so they are stepped and these now have notches that act directly on the plank edges, releasing some of the forces on the bolts by quite some margin, so I could get away with smaller bolts.
Added to the mix is that the forward bulkhead is fixed to this frame, so too far towards the back edge and the nuts of the chainplate bolts will foul with the bulkhead panelling...
The circles above show the old holes (I would aim to get them all in line and maybe vertical...?). This introduces another little issue - I want to drill as close to the centre of each plank, but it would appear that the top bolt must pass below the main beam and that is only about 1" above the bottom edge of the sheerstrake... hmmmm.