Well, today I sort of found out. I re-created some of the beltline siding. It’s lap boards milled to look like shingles. The carpenter said that he couldn’t figure out a way to efficiently make them. While talking with him, he mentioned that it might be possible with a radial arm saw. So, I got to thinking, because I have a radial arm saw…
{WARNING: THE FOLLOWING DESCRIPTION IS SOMEWHAT TECHNICAL, AND IS NOT GEARED FOR THE SPATIALLY CHALLENGED. PICTURES WILL FOLLOW, BUT THE ONE BOARD I MADE IS ALREADY UP AND LOOKING GOOD.}
I tried a few set-ups before realizing that the radial arm saw was limited in arm angle to 22.5 degrees, and for the V-cuts at the bottom of the board, I needed a 45 degree arm angle, 45 degree blade angle, and needed to be able to do BOTH angles. The saw wasn’t capable straight out of the box. I talked with the carpenter, and he mentioned a jig to set the angle. Bingo! I made a board to hold the clapboard at a 22.5 degree angle, with the arm also at 22.5 degrees, and started slicing. That took care of the first cut, but that was only half the V.
How to do the other half? My son asked if I had a hand held saw like the radial arm saw. Of course! My circular saw is capable of mitering a 45 degree angle. I found a piece of wood thick enough to properly set the depth of cut, and started cutting away freehand. A wood chisel to finish out the V, and voila’ !
{/WARNING}
My question, however, is how did they commercially manufacture that piece over 100 years ago?
Here are some pictures:
This is one of the problem boards, split almost in half.

Here is a close shot of the detail.

Here is the beginning of the restoration. I marked the new clapboard using the old one as a template, and then ran kerfs at each mark. This is the result after “kerfing” the clapboard. (sounds kind of naughty, doesn’t it?)

Here is a shot after creating the V and cleaning it out with a chisel…. this one is a test piece and was done with an old, dull chisel. The ‘real’ boards were cleaned with a ‘real’ chisel.

Here’s a comparison of the shadow lines that the new and old boards create … not too bad for a rookie, huh?

so … I need to make a total of 40 feet of this stuff. I’ve got an 8 foot section already made, and they put it up. I’ll take a picture of it tomorrow and post it in my next update.
The contractor is supposed to start on the gutters next Monday or so, and also on the carport roof. The stuff they’re putting on is supposed to have a 10 yr warranty, and the contractor said that he’s been installing this stuff for over 20 yrs, and has not been told of any issues with it. Here’s to hoping …