I'm at work at the moment, so I don't have my resources at hand, but quick question - does a 15" radius qualify as "broad"? (P.S. I got some great info out of the thread about drawing plans, I just happen to have MS Paint on the computer here at work...)
I don't think it's a "broad" curve, but in my opinion it's sufficient for almost any rolling stock. I run passenger trains on that size curve with no problems.
Here is John Armstrong's definition of a broad curve: "Broad curves can take full-lenght passenger cars and virtually all classes of motive power, including articulated steam locomotives, with a minimum of tinkering with running gear or scale proportions. Apperance of all trains is much better than on less generously porportioned track. Conventional curves can take full-lenght passenger equimpent gracefully only if the curves are provided with an easement..." P76 Track Planning For Realistic Operation John in N describes broad as 17 inches, 14 for conventional and 11 for sharp curves. Follow his guidelines for easement and your equipment shouldn't have any trouble.
