I like these turbines (indeed most of PRR's big exotics and duplexes) better than a
NYC fan should, but there you have it. I have the early 3rd Rail (ex-Williams) brass
one, though it has never turned a wheel. I would love one of the new Lionels, but,
no budget.
The real locos would "go like the wind" as I read it described by a former crew member;
like most turbines, they were fuel-efficient at steady speeds, but really not at all happy
with constantly changing RPM requirements that are typical in railroading.
You know, the people who design and build things like this aren't stupid, and they built things to test theories in the real world, never intending to put them into production, at
least not in the experimental form. I'm also sure that they were just a tad more adept at mechanical engineering and railroading than the average OGR Forum member, but this is the era of Experts...
The S-2 did have a big advantage over the reciprocating steam locomotive (the ones
with the big flailing rods): balancing a reciprocating steamer's drivers is essentially impossible, because you have to balance not only the weight of the side rods, but
also both the weight and enormous variable thrust of the main rod. Can't be done, and the
way to moderate this is to have a high-speed loco have big drivers.
The S-2 was fast, very fast and smooth, but it had drivers that looked like they belonged on a Mikado. Why? No big humpin' main rod. Magnificent locomotive, greatly flawed.