Lee, you're simply wrong. Developments in 19th century steam weren't just accomplished by a bunch of shade-tree mechanics tinkering with their "hot rod" until something worked. There are scores of textbooks filled with enough formulae to kill a horse from back in the day.
So while (shockingly) the only difference you see between the 999 and the LFT is size, I assure you it goes far deeper than that.
Also, not all 4-4-0's were ancient history.
Baldwin Locomotive Works, class of 1927:
Superheated, piston valves, Walschaerts valve gear, 63" drivers and nary an arch bar truck to be found.
Rusty
HOLY SEABOARD!!!I gues their is an exspcetion to every rule.That looks pretty slick.She might have been used in fast mail service or maybe fast freight.Hey mike,lionel.I bet this is a great story behind this locomotive.