colorado hirailer posted:

To turn a locomotive, you only have to turn it half way, 180 degrees, and one way,  so maybe can get by with slightly more than half the width of a turntable...that German example is very intriguing.

You couldn't use it to take a locomotive from one lead and turn it to depart on the same lead.  But you could take a loco from one of the leads, rotate about 200 degrees and put it on the other lead.

On the CNJ there was a turntable without a roundhouse in Flemington, and if you go back far enough, it had a two stall enginehouse.

Raritan yard had a non-roundhouse turntable. Red Bank yard did too. They had tracks for storage, though. Flemington is more the one to use as an example.

A few more TT's without roundhouses...

NYC had a turntable at Campbell Hall, off NYO&W trackage, for the interchange to Maybrook Yard.  One at Yorktown Heights at the end of commuter runs.  One at Sedgewick Ave facilities at the southern terminus of the Putnam Division.  

The O&W had a second turntable (at one time) in Middletown on the opposite side of the yard from the roundhouse and shops.  Also had one in Cornwall at the coal pier/hopper storage yard.

Grand Central Station (before the construction of Grand Central Terminal) had a turntable without a roundhouse.

The more I look the easier they are to find...

In the real world the total number of degrees of left curvature has to be very, very close to the total number of degrees of right curvature or the railroad would be running in circles. So locomotives and rolling stock have equal flange wear left and right sides. OTOH, rail does wear unequally on curves with the outside railhead wearing on it's inside side. For this reason railroads with lots of sharp curves periodically relay rail to equalize wear on curves. Also for this reason railroads install flange-oilers just before sharp curves.

With models it takes one heck-of-a-lot of running to cause wheel wear but it does happen. Worn model track? I haven't seen any. 

Lew

 

Operator of the Plywood Empire Route in the Beautiful Berkshires

Growing old is so much more fun than the only alternative.

Lou1985 posted:

After I built my 30" turntable I didn't have room for a roundhouse in the 2'X5' area I had for locomotive storage. So I built and am currently in the process of finishing a 22"X34" engine house. So that's an option if you don't have the space for a roundhouse like I didn't. 

20191117_154454

Your setup reminds me of CSX's Russell , Ky. location.

Of course theirs  is  much larger , but the same idea.

Collin "The Eastern Kentucky & Ohio R.R."

mackb4 posted:
Lou1985 posted:

After I built my 30" turntable I didn't have room for a roundhouse in the 2'X5' area I had for locomotive storage. So I built and am currently in the process of finishing a 22"X34" engine house. So that's an option if you don't have the space for a roundhouse like I didn't. 

20191117_154454

Your setup reminds me of CSX's Russell , Ky. location.

Of course theirs  is  much larger , but the same idea.

I'm modeling the AT&SF in the late 40's - early 50's. My setup isn't based on any specific prototype (I built the turntable based off commonly used AT&SF girder style turntables) but I'm glad to know the old adage is true: there is a prototype for everything 😁

Santa Fe, All the Way

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