Steam Situations.
For the logging and quary lines I would use small rod tank locomotives like 2-4-2Ts 2-6-2Ts and the like, or geared locomotives. The rod locomotives had small wheel bases so they could negotiat the tight curves of an industrial and or logging line. The extra weight above the driver caused by the presence of the water bunkers also helped with traction allowing them to take steeper grades. Geared locomotives, Shays, Climaxs, and Heislers, were built specificly with steep grades and tight curves in mind.
For the rest of the assignments I would use medium sized steam locomotives for the mainline runs. 2-8-0s 2-8-2s 4-6-2s and the like will fit nicely.
For the citris brach. I would use a small loco of like 4-6-0 or small 2-8-0 proportions.
Diesle Situations.
For the logging and quary lines I would use small industrial diesel locomotives. Bachmann's GE 44 ton and 70 ton locos immediatly come to mind for this work. Also second hand power like RS1s and Baldwn VO-1000s and S12s downgraded from the mainline may also be appropriate provided if your curves are not to sharp or grades to steep.
For the mainline I wold reccomend using any of the selection of fine first generation 4 axal power available from several companies. You can put ABA F units on the mainline express runs and 3 unit lashups of GP7s on the through freights that go through and set out and pick up cars from towns along the route, with a single GP unit in the locals that do the switching in the line.
On the citrus branch I would reccomend a small light weight yard or early road switcher of the SW1 SW9 GP9 RS2/3 style.
*(DISCLAIMER)* The operating pattern suggested here is only a generic pattern. It does not reflect the operating practices of any one railroad.
[This message has been edited by Challenger (edited 01-30-2003).]
For loco power, GE U-boats, or even modern CSX comfort cab units, again depending on your time period flexibility.
As for the Florida citrus operations, try to find a good resource text. Should be some good loco pics in there that would generate ideas.
Not sure when Seaboard or ACL discontinued passenger service, but I know they had some beautiful streamlined E unit diesels in colorful paint schemes. I think Atlas may have come out with some smooth running (of course) models of these locos 5-6 years ago. A train show may be the only place to find them anymore, or ebay.
Good luck, and keep us posted on how it's going.
ocalicreek