Driving roundhouse doors magnetically takes more metal than expected

I arrived home this evening to find the Boy had taken a stab at working up the roundhouse door mechanism in Lego. Like all the people on my team at work, he had very high-level instructions, and as with them, he exceeded my expectations. I’m sure there are more bevel gears in his collection, and […]

Another Idea for Roundhouse Doors

My friend Mark Dance has been coming up with all sorts of ideas for mechanisms for Pembroke lately. This week, he sketched an alternative mechanism for opening and closing the roundhouse doors. I’ve reproduced his sketch here, along with my usual ruminations. Mark’s idea is to use Lego bevel gears on a shaft that can […]

More Thoughts on Roundhouse Doors

I’ve been pondering the roundhouse doors for a couple of days. Earlier this year, I came up with the idea to drive the doors with magnets beneath the layout. However, the tangle of rods and levers beneath the baseboard was hard to visualize. So today, I thought I would sketch it out. It still […]

Serendipity at Wakefield

I’m in Ontario attending some training right now, and had a little free time to pop up to Ottawa on the weekend to visit my mum. Being naturally adventurous and used to going on research field trips, she quickly agreed to join me for a trip to the end of the line at Wakefield QC […]

More Roundhouse Drafting

As I was finishing up yesterday, I realized that the roundhouse needed to come closer to the turntable a little bit so as to avoid sharp points at the pit edge. A quick review of Engine Houses & Turntables on Canadian Railways, 1850-1950 by Edward Forbes Bush (thanks for the loan, Scott), shows that a […]

Concepts for Pembroke Roundhouse

It’s really inconvenient to run all the way down to Golden Lake, the other end of staging (12 feet away) to turn the engine, and so, I’m starting to turn my attention to the Pembroke turntable. One of the first things I need to figure out is the spacing of tracks for the roundhouse, and that […]

Sketchup Photo Match

A couple of weeks ago, I picked up some foam core with an eye to starting to mock up the buildings for Pembroke. Unfortunately, there are no drawings to start from for any of the buildings. So, I thought I’d try out Photo Match on Sketchup to see if it could help. I was surprised […]

Engine house doors

Part of my vision is that an operating session starts with the engines shut in the engine house. The first thing the crews must do is open the doors and bring their engines out; and the last thing they do when retiring is to close the doors behind them. Now, I could just make the […]