It took a bit longer than expected to get our bearings again and work out where we left off in detail. The girder was pretty much finished prior to moving from London, and is just awaiting a set of four bolts to strengthen the daggerboard case. As I never posted anything on that step, here is a quick run through it.
Time warp back to 2015!
We bolted down the port side of the girder on the building box. Then we glued the straight doublers down first, to add stability before bending the curved bits into place.
Laying out the internal framing on the girder
Gravity clamping. Never thought that old book would be useful again 😉
Removing a bit of excess epoxy. Gotta love a rebate block plane.
More gravity at work.
Adding the curved doublers. Note the small blocks screwed down to hold the curve.
Girder ready to close.
Closing the front bit.
Front section closed. The aft section has the first three coats of epoxy on the dagger board case region, to ensure an extra thick, smooth coat. The rest was then sealed before glueing down.
Last polishing up.
I should mention that we ran into some issues while glueing up the last bits, once again based on errors in the CAD plans we used for the CNC routing. I cannot stress enough to use the class association provided CAD plans, not the ones held by 4th Dimension in Bristol. In the case of the girder one of the large lightening holes was off, making it necessary to shift the position of the diagonal bearer running up to the mast foot.
The relevant detail on the plans.
Notice the diagonal bearer doesn’t quite reach to the top. Quite a bit of filleting involved in making sure it is stable.
With the girder near finished, it was time to pack everything up for the move to Sussex, but not without some fun and games:
Aaaand pretending it’s already a boat, prior to packing it all up.
Fast forward back to late Summer 2017:
Starting up again. And scratching our heads to remember the details.
But we figured it out 🙂
Frames and the cut and prepared MDF strips for the temporary framing to mount them.
More to come very soon!
Building a Farr 3.7 