are the top edges of the flanges flat or tapered where they meet the hubs on 1911 cars?
Not sure exactly what you are asking.
1910 - 1912 hubs look like this:
1912 factory photo:
The edges are rounded on the early hubs. The later ones have a "square" edge.
Thank you Royce and Darel,George Do you know when they used the 45 degree angle on them?
This is a later hub from about 1919 - 1927. This one happened to be on a non demountable wheel with ball bearings but the same hub was also used with roller bearings on demountable wheels. The edge is beveled.
Did Ford make the hubs &/or plates or did he have other suppliers? If so, maybe they looked different from different suppliers.
Hubs were supplied by the wheel makers through about 1918 or so. Ford made all the hubs beyond that time, and perhaps a bit earlier. If it is a supplier made hub it will have the maker's cartouche on the part like these examples of 1913 - 1917 hubs:
Ford of Canada also made their own hubs: