Color version of 114
Thanks, Charles. This seems to be the first of the three hole wheels. For my communication purposes with the manufacturer, we are calling this one on 114 "Gen 2A" and the other three hole wheel "Gen 2B" with the early 16" split wheel with slotted spokes being "Gen 1" and the later 15" wheel with slotted spokes being "Gen 3". We are also aware that there were different thicknesses of wood produced at different times with no recorded history of precise dimensions. But, we are still digging.
Everyone keep in mind that my original goal was to get a correct reproduction wheel for my 5S243 and in the process, I made the discoveries. I am also on a quest to find a decent Chrome plated pot metal hub.
In summary and for my internal records with the manufacturer and my collaborators and knowing that there may be other variants yet to be discovered:
Gen 1 = 16" slotted wheel split in the middle
Gen 2A = 15" three hole wheels with hole size and pattern like 114 and 117 that I have seen photos of. Gen 2A holes measure approximately* as follows: .480, .630, .890 inches.
Gen 2B = 15" three hole wheel that has hole size and pattern like this one shown from Rich Williams. This one seems to be the most prevalent of the 3 hole wheels. Gen 2B holes measure approximately* as follows: .623, .660, .830 inches.
Gen 3 = 15" slotted wheel installed somewhere after / around 256
Note: I have been told that a very few cars were supplied with prototypes of what became the 66 optional wood rim 4 hole wheel.
* I say approximately because hole diameter precision in the manufacturing process was not that important back in the day. Plus, I have personally only measured two of the 2B wheels with input from others on the 2A wheels.
From what I have seen in print and from SAAC officials this is the history of the steering wheels:
"001 to about 113 had the 16-inch Cobra 289, slotted, wood wheel with the aluminum hub.
109 - 256 for the most part had the slightly flatter dished 15-inch wood wheel with three holes present per spoke with the chrome plated steel hub.
257 - 562 had the 15-inch slotted wood wheel with chrome steel hub."
A few updates to this quoted info: I have been told that the hubs were chrome plated pot metal, not steel. We also now know for sure that there were at least 2 versions of the 3 hole wheel. More to come as I discover it.
FYI, Springall says they will make a small run of both the 2A and 2B wheels. Mine needs the 2B so that is my focus.
If you really want to get into the detail, the wheels from that part of our history were made from strips of wood (mostly mahogany) bent and laid up circumferentially around the rim in a hoop manner and all glued together in a kind of mold. They were then cut and installed onto the stamp-pressed aluminum frame with rivets. The driver would then be facing the beautiful edges of the wood. The repros that I have seen lately are laminated front to back like plywood such that the laminations can only be seen from the edges or where the contour has been carved. It is this specific issue that got me started when I purchased what I thought was a correct wheel from a respected supplier and they told me they do not make wheels with circumferential strips any longer. Another interesting point of blurred history is that the circumferential strip method was performed by a company called Coventry Timber Bending (quaint, yes?) and it is thought that they supplied the laid up blanks and perhaps complete wheels to many of the early wheel makers as early as 1938 for many of the elegant cars and boats of the day.