I agree that an issue of "Classic Trains" on turntables is in order. During the steam era, some end of the branch line turntables were "armstrong", that is all of the train crew helped turn the engine. The engine had to be centered on the turntable to be turned with ease.
As information: at BNSF's Northtown yard, the turntable at the Diesel Shop is from the old Northern Pacific roundhouse about three miles south of its present location. In the early 1970's, the new Northtown Diesel Shop was built using the old NP turntable. In short, the present timetable at Northtown turned NP steam and diesel engines and now turns BNSF power. It also can turn freight cars as needed to accomplish unloading from a specific side (if placarded UOS-unload one side only) before spotting into an industry.
One afternoon about 1968, I took mail to the roundhouse. The hostler asked me If I wanted to move a locomotive off the table to a diesel shop stall. WOW! After the table was locked for the stall, I slowly moved the ALCO RS Unit to its stall. I applied the engine brakes, but they did not apply until the very last second! Needless to say, I was scared, but the hostler just sat there. Finally about twelve feet from the end of the stall, the brakes applied. The ALCO RS units were know as shin busters as the steps were straight up and down and one tended to scrape shins on them.
Happily retired NP-BN-BNSF Clerk from Northtown
P. S. Freight car D/F bars also scrape shins--One fell on my left shin!