For a long time I have wanted to make a couple of Bowback Stools, as produced by Thomas Moser’s company in the USA:
https://www.thosmoser.com/product/bowback-stool/
I have previously made a Windsor Chair with James Mursell at the Windsor Workshop: https://thewindsorworkshop.co.uk
Here it is with the desk I made for Sylvia:

We recently met James Mursell at a craft show, and he kindly agreed to help me make a couple of Bowback Stools on one of his 5 day Two Stool Making courses, and we have arranged a course in the spring.
Because I will be making a different stool than the rest of the group, I decided to do some preparatory work.
Firstly. I purchased a couple of Tom Moser’s book cheaply from on-line sites: “Thos. Moser’s Measured Shop Drawings” and “Thos. Moser’s Windsor Chairmaking.” From these I have seen able to obtain sufficient design details to reproduce the stool. The second of these has 1:5 scale drawings of the seat and the bow, and I have had these enlarged to full size at a local printers.
I was hoping to get permission from the Thos Moser company for me to include here a couple of photos of the drawings in these books, but have not had a reply. I heard last week that, sadly, Tom Moser died on 5th March, aged 90. He leaves a great legacy of fine furniture.
The plans shows the angles for rake (forward and backwards angulation) and the splay (sideways angulation) of the legs and spindles. From these two angles I have used Peter Galbert’s layout method for converting the compound angles into the sightlines and their angles for drilling the holes:
https://www.youtube.com/watch?v=_i3Mnz8VTYM
As the leg of a stool is angled from a vertical position, the distance it moves across the floor gets greater per degree of angulation. It’s not simply a matter of a fixed distance per degree of angulation, as can be seen on the Taytools Bevel Setting Gauge” below. Peter Galbert’s technique and this bevel setting gauge makes the process very straightforward.

Having marked out the sightlines on the drawing, I needed to produce a template to create the shape of the seat.

The seat drawing is not perfectly symmetrical, so I make a template of one half (using some stiff clear plastic sheet I obtained for templating parts of the dinghy I’m slowly building). By transferring the details of one half of the drawing, I was able to make the shape perfectly symmetrical by simply flipping the template over to do the other side.
The next step is to define the shape and size of the bow. I made a drilling Jig to drill the correct angle and then fitted a length of 4mm diameter mild steel rod.


I then drilled the holes for the spindles and adjusted the bow to fit.

Using some card, I was able to take the shape of the bow and produce the former for the bow.



The template was not symmetrical so I chose one half and marked the wood accordingly, having adjusted the line to take account of the thickness of the bow. Using a batten, I faired the curve and extended the bottom of the line to provide some spare length.


With on a pine board marked up ready to make a prototype seat, and the ‘former’ ready to make the bow, I moved on to preparing the wood for the two sets of components
James would normally use ash for the stool parts, except for the seat; with ash, tulip wood, sapele frequently chosen for the seat.
I would like to use walnut for the stool’s seat, and for the bow – if you look at the Thos. Moser website, using the hyperlink above, I think you will appreciate why.
Unlike ash, walnut does not steam well, so I have decided to laminate the bow. If I am unsuccessful, we will at least have the ‘Former’ to steam bend some ash on day 1 of the course!
The dimension given for the bow is 27mm. I made my laminate strips about 2-3mm thick and 40mm wide to allow for any mismatch when glued up. My attempt to laminate the bow in a single step failed – three of the eight strips broke at the same place, where there was a wave in the grain. As a result, I had to glue each laminate strip in turn! Here is one of the set ups with a few strips in place:

And here is one of the two completed laminations:

After cutting the laminate off the former on the bandsaw. I planed the width and thickness down to the required 27mm. Using the 7:10:7 proportion rule I marked out the lines on each of the four faces to which I needed to plane off the corners (with a spokeshave) and make it eight sided. From there it was a fairly simple but careful task to shave off the resulting smaller corners and round off the bow.
Here are the bows:

I did cheat a little with the seat blanks – with my friend Matthew’s help and his surface planer we “jointed” the pieces to make the seat blanks. The stock I had bought was not quite wide enough to make the seats in one piece.

Three more steps are required before I’m all set for our Windsor Workshop trip: I shall transfer the shape, the hole positions and the sight lines for drilling to the two blanks, like the prototype above; fit walnut dowels into the ends of the bows make the “loose tenon”s” that will fit into the seat; and I need to make a jig to help create the 35o bevel on the ends of the bow.
Ah well, “back to the bunker!”