Req 7a7 — Switching Contest Skills

The Timesaver is a classic model railroad puzzle invented by John Allen in the 1960s. It is a small, specialized track arrangement — not a scenic layout — designed to challenge the operator’s ability to move freight cars to their correct destinations in as few moves as possible. Switching contests are a staple at model railroad clubs and conventions.

What Is the Timesaver?

The Timesaver layout consists of:

• A single curved or angled main line (the “lead”)
• Five short stub tracks (spurs) of different lengths branching off the lead
• A set of freight cars placed on the spurs in a random starting order

The goal: rearrange the cars so that each spur holds a specific type of car (a designated “solution” or target arrangement) — using the locomotive to push, pull, and shunt cars through the track switches. The fewer moves and less time you use, the better.

Why the tracks are different lengths — this is the puzzle. Some spurs can hold two cars; some can hold only one. Your locomotive takes up space on the lead while it works. Getting one car into a short spur may require temporarily parking another car somewhere else, then retrieving it. This is exactly what real railroad yard crews do.

How a Switching Contest Works

1. Setup: The contest host places cars in a starting arrangement on the spurs and gives you a target arrangement (where each car should end up).
2. Timer starts: When you say “go,” the timer begins.
3. You operate: Using only the throttle and track switches, move all cars to their correct destinations.
4. Timer stops: When you announce the arrangement is complete, the timer stops.
5. Your time is recorded. Contest standings compare times across participants.

Some events add a move penalty — each time you reverse direction counts as one move, and moves are added to your time. This rewards efficient planning over fast execution.

How to Find a Contest

Switching contests are most commonly held by:

• Local NMRA (National Model Railroad Association) divisions — check your division’s calendar on nmra.org
• Local model railroad clubs — many clubs have a Timesaver set up permanently at their layout for casual play and formal contests
• Model railroad shows and conventions — Timesaver contests are popular show floor activities

Recording Your Time

Write down your time immediately after the contest. When you meet with your counselor, bring your recorded time and be ready to describe:

• How the Timesaver works and why it is a challenge
• Your strategy for approaching the puzzle
• What you would do differently to improve your time