Welcome to Free-Mo S Scale

Free-moS is an S Scale (1:64) modular standard based on the Ho Scale Free-mo Standard for model railroad modules that emphasizes flexibility and realism. It allows modelers to create individual scenes that can be connected in various configurations to form a larger layout. The standard specifies the endplate dimensions, track placement, and electrical connections to ensure compatibility between modules. This approach enables hobbyists to collaborate on large, detailed layouts without being constrained by a fixed track plan.

One of the key features of Free-moS is its focus on prototypical operation and scenery. Modules are designed to represent real-world locations and operations, with attention to detail in track, structures, and landscapes. This emphasis on realism enhances the overall experience for operators and spectators alike. Additionally, the modular nature of Free-moS encourages community involvement and sharing of techniques and ideas among model railroaders.

Free-moS modules are built to a scale of 1:64, which is known as S Scale. This scale offers a good balance between size and detail, making it popular among modelers who want to model standard gauge railroads in a smaller space. The standard also allows for the use of Digital Command Control (DCC) for train control, which provides added realism and flexibility in operations.

Who can build a module?

Anyone with an interest in model railroading can build a Free-moS module. The standard is designed to be accessible to modelers of all skill levels, from beginners to experienced hobbyists. Modules can be simple or complex, depending on the builder’s preferences and abilities. The modular nature of Free-moS also allows for collaboration between modelers, so individuals can contribute their skills and resources to create a larger layout together.

Recently Updated Modules

Frank Let Fuel

The Frank Let Fuel Module was a quick module I put together to show off the first Free-moS module at a show in March 2026. It is now currently used along with Heileman Brewery module to add length to the West end for switching. It holds 2 tank cars.

Heileman Brewery

This module represents the G. Heileman Brewery and surrounding industries in La Crosse, WI. The module set will be 24 feet long consisting of eight 4 foot modules. I had to get a little creative with the modules to get the scene to fit, turning 4 modules on the long

C&NW La Crosse Yard

This module is based on the Chicago & North Western yard in downtown La Crosse, WI as it appeared in 1968. The module includes the C&NW Depot, Freight House and team tracks. It is designed as a 20 foot long scene using five 4 foot modules, but could be expanded

How do I get started?

If you are interested in building a Free-moS module, there are several steps you can take to get started:

  1. Read the Free-moS standard to familiarize yourself with the requirements and guidelines for building a module.
  2. Decide on a location, era, and theme for your module. This will help you plan the track layout, scenery, and structures.
  3. Reach out to other modelers on the Facebook Group, check out our Groups.io page, or Contact Us to get feedback and ask any questions you have.
  4. Gather the necessary materials and tools to construct your module, including track, roadbed, scenery materials, and electrical components.
  5. Build your module according to the Free-moS standard, following the specifications for track placement, module dimensions, and electrical connections.
  6. Test your module to ensure that it meets the standard and functions properly. Make any necessary adjustments or repairs before connecting it to other modules.
  7. Connect your module to other Free-moS modules to create a larger layout. Participate in operating sessions and events to share your work with other modelers and learn from their experiences. Watch our Facebook page for opportunities.