Today we glued the upper assembly. Everything went smooth with the Rum’s alignment jig and liquid hide glue. My wife helped with glue-up and photographed as well.
The spindles are lined up at their base. This photo shows the 1 5/8” spread in lengths from the outside to the inside spindles.
Applied glue to the seat holes with a syringe.
Applied glue to seat tenons with a brush.
Insert four center spindles.
Fit the alignment jig.
Add spindles by inserting into jig and then dropping into the seat.
All spindles inserted and ready to receive the top crest.
Top crest aligned to start on 14 spindles at compound angles simultaneously.
Work the jig and the top crest down.
Making some progress.
Measuring the progress. The spindle tenons are 1 1/4”.
Remove alignment jig.
Outer half of alignment jig before removal.
Pound top crest the rest of the way with dead blow mallet. There is a balance between applying enough glue for good bond and too much glue that must find a way out of the joint. Clamp pressure usually has enough steady force to squeeze the glue out, but it would be a bit difficult to clamp this assembly. Perhaps a you could cut a relief groove in the top of the spindle with a carver’s V-gouge. It went in, so I probably won’t worry about that on the second chair.
Next, I pin the top crest spindles…
-- Mark, Florida