Don't forget Georgia RR #302, which survives in good shape in an Augusta museum.
While not strictly a USRA design (it is Lima 1914), it has 64" drivers, 27 x 30 cylinders and weighs 142 tons, making it one of the bigger surviving Mikes.

http://railga.com/ondispl/augloco.html

Do WP 334 at Rio Vista and C&IM 551 at NMOT count as USRA Heavy Mikes?

Rob Gardner

Rob -

I believe that C&IM 551 is a copy of a LIGHT USRA Mikado. Not sure about WP 334.

Les

C&IM 551 is a copy of a USRA light 2-8-2:

http://www.stlouisnrhs.org/MOT_Treasure ... 200703.htm

WP 334 is a Western Pacific design, not USRA:

http://viewoftheblue.com/photography/ca_rwy762.html

For comparison, here's an example of a USRA heavy 2-8-2; it's a good deal chunkier than C&IM551, and its proportions are somewhat different from those of WP 334, although its overall size looks close:

http://en.wikipedia.org/wiki/File:USRA_Heavy_Mikado.jpg

http://www.railarchive.net/randomsteam/erie3209.htm

Again for comparison, a USRA light 2-8-2 clone--in this case, with Baker valve gear and a cast trailer, plus other detail changes. However, the basic proportions and dimensions show as a much slimmer locomotive than the heavy, with a different boiler taper, too.

http://www.railarchive.net/randomsteam/nkp636.htm

Among other things, the slimmer boiler results in a proportionally taller sand dome. That and a stronger taper leading to a slimmer forward section are the principle spotting characteristics between light and heavy USRA engines, not only of 2-8-2s, but the 4-8-2s, 2-10-2s, and the 4-6-2s.

Light 2-8-2 erection drawing:

http://upload.wikimedia.org/wikipedia/c ... iagram.jpg

Heavy 2-8-2 erection drawing:

http://upload.wikimedia.org/wikipedia/c ... iagram.jpg

Not heavy but USRA-related...this is from 1990 but some may not have seen this.

https://www.asme.org/getmedia/07c57eac- ... -8-2A.aspx