Need information.

Hi everyone! While I get my computer fixed, I have been thinking about creating a freelance route, set around Pennsylvania during the Steam-Diesel transitional era, which gives me an excuse to run my PRR Steamers. Anyways, I'm more used to the modern railroad so is there anything specific I should know? For example, what signals were used by the PRR in the 40's and 50's, maximum gradients, how many coal hoppers a steamer can pull depending on the wheel arrangement, and so forth.

Any help is appreciated, thanks!

PRR Signal Bridge by GFisher

PLS signals by Seniorchief

PLS Dwarf in most locations, and sometimes low platform signals that stood @ 4' high (name escapes me).

Horseshoe Curve 1.45% (1.78% to Tunnelhill... 2.37% on the "Slide")

Harrisburg to Altoona mostly @ 1% or 0.50%, or much less.

Steam locos usually pulled @ 100+ cars, and took at least 2 doubleheaders on the point.

On the Horseshoe 2 more locos were usually shoving on the rear.

There were plenty of single tracked PRR brachlines that were way cool ... like where the Bellefonte Central is today.