Glenwood, South Park and Pacific Railroad
The oldest 15" gauge railroad in the Santa Cruz mountains of California.
No. 1 many years ago
Here are links to various technical topics.
This is a link to my assembly drawing files
Scales and gauges can be confusing. Here is an un-confuser
Scales and Gauges
Before starting to build your locomotive, you have to design the cylinders and valves
Slide Valve Design
If you want to lay track, I have a calculator to help lay out curves
Link to Curves
The drawings used to build the GSP&P caboose
The foundry I use is very busy and slow. These web pages are for reference only
Link to Grand Scale Parts
If you want to actually build a small 15" gauge locomotive, here is a good start
Emails concerning the GSP&P or Grandscale railroads in general can be sent to: