diesel engine sizes...

[NCMRailroad]

Hi all...
Instead of asking some model railroad hobby shop this question, I thought i would ask here in the GAUGE instead!
I have a few tight radiuses on my layout and can run, with ease, a Switcher (Proto 2000 ALCO S-3) on it. I believe my tightest radius is aprox. 15" but no smaller.
Even though I am basically modelling steam (3 truck shay) I would like to give something a bit bigger than the ALCO mentioned above in DIESEL a try.
Any suggestions would be greatly appreciated.
NCMRailroad:thumb:

 

[Russ Bellinis]

I think a gp7 or 9, gp20, gp30, gp35, & gp40, for Alcos rs1,2,&3, rs11 will work on the 15 inch radius. A rsd4/5 might work, I'm not sure how long the trucks are on those. Emd f units and Alco fa will work on 15 inch radius.

 

[toptrain1]

Russ hit the nail on the head. If you want your locomotives to access the complete layout and you have 15" radius turns or use #4 turnouts. Keep your diesels down to 2 axel trucks. In steam 0-4-0 and 0-6-0 switchers with blind center drivers.
toptrain

 

[NCMRailroad]

Thank you fellas for the advice. The shay I am currently running on my layout works well but becomes rather oh hum after awhile. This gives me a better scope on what I can run on my layout. Thanks again!
NCMRailroad

 

[Gary S.]

The CF-7 by Athearn may work also.