Re: K-37 frame castings ...

Of course I have no way of confirming what other work was done by Baldwin and D&RGW. But when finding “STURNS & ROGERS DENVER” with the pattern number, it seemed to me most likely that the railroad purchased parts that were identical to the K-36 and invested into local development of anything custom to fit the SG boilers. I am assuming that the frames through the driver area were purchased from Baldwin and defiantly the area under the fire box and possibly the front end were done at the railroad.

The railroad over time would add a lot of the smaller running gear parts common to both K-36 & K-37 to in-house production but I would bet that thru the “1920’s” common parts were purchased from Baldwin.
Most of the K-37 pony truck is the same as the K-36 but the trail truck on the K-37 has more in common with the Alco K-28 than the K-36.

They did a great job on the “Frankenstein” project. I would sure love to see a K-37 running again.

Mr. King, as I recall you cut your teeth on the K-37 at Chama and may have spent more time at the boring rig than I did.

The 50 was defiantly the most unique Rio Grande engine I have been involved with.

madjack