Yes, Mark, we did nix the turntables in your initial design, but the questions here are size and brand. TrainHead mentioned Millhouse River Studios, but also mentioned 30” and 34”. SCARM only has 24”, 28” and 34” models in the library, so I did versions with each. He also mentioned the Korber 5-stall Roundhouse, but SCARM doesn’t have it in the libraries. So, I tried searching and found a thread that had some dimensions. I created an object to emulate the footprint and placed it in the design, but I have no way of knowing if the dimensions are accurate. SCARM has 34” models with 24 positions at 15°, 36/10°, 48/7.5°, 60/6° and 72/5° as well as 24” models with the 24/36/48 and 28” models with 24/36/48/60. However, they all result in a different footprint for the whisker tracks as well as the 3 connecting points to the coaling tower.
I thought using a turntable with the same positions/degrees would give the same footprint for the whisker tracks and while that’s true to a point, they all result in a need to move the roundhouse further from the turntable so engines can clear the doors. I didn’t experiment with them all, but I believe those with 48/7.5 are the turntables that work with the 5-stall roundhouse. That suggests that the 34” could be replaced with the 24” or 28” models with slight repositioning of the roundhouse and reworking the leads from the tower.
However, using a smaller turntable will result in not being able to turn the longer engine. I believe he said it was 36” long, so the wheels will fit on the 34”. I remember noting that nothing could be near the turntable that the engine overhang might hit. I think he said everything will work with O-54 curves, but he’ll have to confirm that. And those O-54 turnouts were originally O-63s, but Atlas doesn’t make them. If the long engine can’t work with O-54s, then he won’t have a choice but to add an O-72 turnout to the yard and connect it to the turntable, something I think should be added regardless.
in any case, here’s what a 24” turntable would look like. Note the roundhouse didn’t move much, but I didn’t really play with changing the the tower area pending comments from TrainHead.
