I intend to eventually format the data into a more usable format, but for now I want to put it out for reference and feedback.
Unfortunately, many plane types share the same bed markings, so other features are also used in dating.
Some plane parts were frequently replaced by their owners, or are easily separated from the plane, such as irons, cap irons, knobs and totes, and lever caps.
These features are avoided where possible, along with features that appear in only some planes of a given type (i.e. Where possible, the flowchart uses parts that were probably replaced less often, such as frogs, depth adjustment screws and lateral adjustment levers.
This approach doesn't guarantee that you'll date your plane correctly, as the flowchart can be thrown off by some hybrids.
Some owners worked them so hard that they had to replace one or several parts.
Some simply put the wrong bit in the wrong place, some customised their tools to suit their needs - the possibilities for change are endless.The flowchart starts by asking questions about the cast iron bed of your plane.I've chosen the bed as a starting point because it has many easily identifiable markings, and it probably wasn't replaced that often.I've converted some of the plane dating information found in Patrick Leach's Plane Type Study into an easy-to-use hypertext flowchart.Hopefully by answering a few questions about your plane you can determine which type it is.There are detailed type studies available, usually starting with type 1 for the first model then going up with every little or major change.