Railroad Supply American Boilers

[Marty_Knox]

We have been working on 3 Railroad Supply 1 1/2" scale 4-4-0 boilers. They are a challenge because of the size and working from 3 different sets of drawings, but we are pleased with the way they are coming together. Here are some pictures.

[Marty_Knox]

Some more pictures.

[Builder01]

Beautiful steel boilers! What is the overall length of these boilers?

David

[Marty_Knox]

Beautiful steel boilers! What is the overall length of these boilers?

David

24 1/16"

[BClemens]

Marty,
May I ask why you are working from three different sets of drawings for this boiler. They appear identical.
BC

[Marty_Knox]

The boilers we are building are identical. I have the RRS drawings for a copper boiler, and two versions of their drawings for steel boilers.
These are built to MY drawings, so I guess there are actually 4 drawing sets.

[Cary Stewart]

Marty,
Are you using the old RRSC throttle set up? In the original version it worked kind of like a switch. I suggested that the vertical hole in the casting be modified. Where the round hole in the throttle bar started to open to admit steam a triangle or a involute could be made with accustom broach. This would allow more sensitive throttle control at start up. I had suggested this to Chet Peterson in the early 70s but he said the throttle was a good design and he would not change it. I talked to King Fry and he agreed but as he was building to RRSC prints and they were supplying the throttle assemblies there was nothing he could do unless a individual asked him to have the broach made - a very expensive order.
Cary

[Marty_Knox]

Hi Cary - yes, we are using the RRSC throttle setup. I had my reservations about it from the start. I just may try your idea.
I may try filing the triangle in.

[SteamHeaton]

Marty, beautiful work as usual. Thank you for sharing the pics. Ray III