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J-Rails are coming

Hello from a very wet, monsoon evening here in Brunei. One of the most popular questions I get asked is how I will create the 'J' Rails for the crew seats. To be honest, I haven't really thought about it much as I'm not quite at that stage in the build. However, when I awoke at 7am this morning, this idea suddenly shot into my head (I have no idea why).

I needed to remember this as I thought it would work well and is very different from how it is actually carried out on the real aircraft. As soon as I got home, Fusion 360was opened. I dug out the 'J' Rail pictures and dimensions from Paul Wheatley and the design process was started.

3d printed, Boeing 737  'J' Rail truck.
3d printed, Boeing 737 'J' Rail truck.

My idea consists of two 3d printed parts, the upper and lower truck assembly supported by four cheap skateboard bearings. The unit is then guided in the channel by the bearing at the front of the unit. The whole unit is allowed to rotate ensuring the seat remains square and forward-facing at all times.

These 4 truck assemblies then ride in an 18mmm MDF channel which can be cut by a jigsaw or CNC machine.

The Boeing 737 crew seat J rail system
The Boeing 737 crew seat J rail system