We are getting ready to build at least one, and maybe two three way stub switches as the lead to our new building.
We have 5 existing 2 way stubs, have a pattern for the head blocks for those, as well as the pattern for a harp switch stand. Those patterns were faithful copies of existing historic parts. They have been in service now over 25 years. We have a couple of options for a 3 way head block, either making a new head block pattern, based on the 2 way head blocks (using the same core box) or fabricating one from riveted plate based on drawings in W B Parson’s “Track” published in 1886.
One thing we have noticed is a difference in “throw”… our original head block, our pattern, and our switch stands all seem to have a 4.75” throw… Parson’s shows a 5” throw. Is there anything like a standard throw for a switch stand? Again, if it matters we are channeling 1886.
Does anyone have any thoughts on making a fabricated head block for a stub switch? Or an existing pattern for a three way for about 50lb rail? We may need to fabricate a couple of additional frogs as well. We are considering making patterns for a set of wedges to form the frog, again for about 50lb rail, unless someone knows a commercial source.
Some thoughts about our railroad, It is 3’ gauge, we use 40-56lb rail, no tie plates, standard gauge ties. Our minimum radius is 24 degrees. Our heaviest axle loading is about 6 tons. This is a primarily horse drawn railroad, with a couple of Plymouths for back up and occasional visiting steam.
photo by Joe Thompson
Randy
