Raised on the Erie Lackawanna Mainline- Supt. of the Black River Transfer & Terminal R.R.
It should work OK, but those big engines will look sort of strange. Myself, I use #6 turnouts for most applications. Considering that you are using pretty tight 24" radius curves to start with, the #5's should be fine.
BTW, the average 'rail radius' for a #5 is about 26"(per the NMRA RP's). However, the big issue with turnouts are the reverse curve built into them and how much tangent track there is between the curves created by your yard ladder.
Why not 'temp' spike down a #5 yard ladder with a 24" radius curve leading up to it and 'test' it first?
Jim Bernier
Modeling BNSF and Milwaukee Road in SW Wisconsin
I believe you will have no problems. My Lionel Challenger, which should have very similar operating specs as the one you have, had no trouble whatsoever with the "long" EZ-Track turnouts available to me in early 2005. They would be something like #5+ turnouts. The Big Boy is a bit of a question, however. I would be uncomfortable saying that it would be okay on a true #5.
-Crandell
I've got some #5 turnouts in my yard, and my Genesis Challenger has no problems with them at all. In fact, all of my many articulateds go through them with no problem, including my Yellowstones, and we're talking mostly brass here, with prototypical articulation (only front set of drivers articulating). True, as they're going through, there is some un-prototypical overhang, but it doesn't last very long, so I can live with it
Tom
Tom View my layout photos! http://s299.photobucket.com/albums/mm310/TWhite-014/Rio%20Grande%20Yuba%20River%20Sub One can NEVER have too many Articulateds!
If you avoid a No.5 S-curve, you should be OK. A No.5 is equivalent to a 26" radius curve in HO IIRC. My old layout had a few No.5's, and a Life-Like 2-8-8-2 would go thru em OK.