Welcome to the roundhouse. Here I will detail the construction of the roundhouse from start to finish. You will also find the builders photos of the entire WMRR motive power fleet. Check back soon for updates to this page.

The first 6 pictures above are described on the tour page. The second set shows close up details of the bridge and drive system.

The first picture is the block that the bridge rides on. Centering (side to side) this shaft is the most critical point of the bridge construction. If it's not centered, the bridge will not be aligned properly when turns 180 degrees. To keep the bridge shaft from spinning (leaving the bridge stationary) a mounting flange was made in the WMRR machine shop. There are 2 set screws, 1 on each side of the flange, to hold the block to the keyed shaft.

In the second picture you can see the underside of the bridge. The bridge simply fits over the bridge block in picture one.

The third picture shows the top of the bridge where you can see the ring wheels. Note that there are no flanges. This allows for small errors in the ring rail itself. Care still must be taken to insure the wheels don't fall OFF of the ring rail. Shimming the supports of the ring wheels will adjust the height of the bridge.

With the fourth picture you can see a close up partial view of the turn table. It shows the relationship between the ring rail and the bridge itself.

The fifth picture is the under-workings of the turntable. You can see the worm and gear arrangement as well as the motor. The index wheel was cut in the machine shop and also indexed using a calibrated rotary table. 1/8" holes in the disk will allow the use of optic sensors for indexing. At this point, I'm considering abandoning automatic indexing all together and doing it the real way, By eye. That decision hasn't been finalized yet.