The southern campus of the Nevada State Railroad Museum is located at Boulder City (near Las Vegas and Hoover Dam). The volunteer operated train ride is known as the Nevada Southern. Last weekend the motive power was its ex-US Army #1855 a 1953-built Fairbanks-Morse O-P switcher:

The usual locomotives were at the shop. ex-UP GP30 #844 was getting a paint job and ex-UP NW2 #1000 is awaiting a motor repair/replacement.

Are there any other active opposed-piston F-M locomotives in preservation?

Sure...IRM has MILW 760, the former demonstrator, the first FM locomotive of all.

https://www.youtube.com/watch?v=ruQqXtDdKTc

U.S. Army 1843 has been in operation every year, since its donation to the Rochester & Genesee Valley Railroad Museum in 1993.

http://www.rgvrrm.org/about/railroad/usa1843/index.htm

JR

Golden Gate Railroad Museum:

https://www.youtube.com/watch?v=A0R9eHljo4E

I haven't a clue of its current status, but the Museum of the American Railroad in Frisco, TX, has an ex SP H-12-44 that up until '09 operated and was used for switching. I don't know what happened after that because I moved out of state. Last I heard it had some water pump issues that may have sidelined it. Anyone have something more current on it?

Despite being in storage for quite sometime TVA H16-66 #F3060 still turns a wheel occasionally. Here's a video of it operating in the late 90s,

https://www.youtube.com/watch?v=lPLH5JwqGxg

Weyerhaeuser Timber Company #1 Fairbanks Morse H12-44, built 1951. Operated on the White River Branch outside of Enumclaw Washington.

Stored operational at the Northwest Railway Museum in Snoqualmie Washington.

Daniel Calhoun

The North Carolina Transportation Museum, in Spencer, NC, has an operable H12-44. The website's writeup:
"Beaufort and Morehead #1860: This locomotive was built by the Fairbanks Morse Company of Beloit, Wisconsin and is a model H-12-44. FM entered the locomotive business rather late, basing the power from their opposed-piston marine engines used in diesel submarines used during World War II. This locomotive was originally purchased by the US Army in the 1950s and used at the Sunny Point Military Ocean Terminal before being used to switch the B&M and based in the Morehead City.State Ports. The NC Transportation Museum acquired the locomotive in 2004 after disposition from the State Ports.".

Somewhat OT: having listened to some youtube videos of the FM-OP locomotives running, makes one wonder what a WWII US Fleet class sub sounded like when all four OP engines were brought online!

Bob

I may be wrong, but I think Portola has an operating or operable FM, like most, a former Army unit.

Yes, indeed!

Here's a great video from 2013 of USA 1843 in operation at our museum...

https://www.youtube.com/watch?v=ih3eEeylUYY

-otto-

Here is my (marine) OP chugging away at 800RPM at work.

https://www.youtube.com/watch?v=RpoGhex8gsg

You can sort of experience that today on the Great Lakes in a roundabout way, albeit in ever diminishing numbers, thanks to Canadians heavily utilizing FM OP's in 1960's Seaway construction as the steam turbine slowly fell out of favor for new vessels during that decade.

Algoma Central Marine's Algoway and Algorail continue to operate with each having 4 Fairbanks-Morse 10-38D8-1/8 diesel engines in their engine rooms. I believe this is the same power plant that went into our fleet subs during WWII that had FM engine installations. They're expected to be replaced over the next 12-24 months with newbuilds from Croatia, of all places.

And while she's in temporary layup but hopefully to return for the Fall grain rush, the last of the classic first generation of Canadian straight deckers built during the first 10 years or so after the St. Lawrence Seaway opened survives as the Manitoba for Lower Lakes Shipping. She is powered by 4 Fairbanks Morse model 8-38D8-1/8 diesel engines and hopefully has a few more years yet in her.

And lastly is a former package freighter that was converted to haul powdered cement back around 1980 with the demise of the that business on the St. Lawrence River thanks to the growth of the Canadian highway system. It's Essroc Canada's Stephen B. Roman and she has two 10-38D8-1/8 and two 8-38-D8-1/8 diesel engines in her engine room.

There once were many more. But time, changing market conditions, and the FM's having a reputation for being a bit of a fuel hog have decimated their numbers over the past 20 years.

The Cape May-Lewes ferries across Delaware Bay were built with OPs, but one of the three boats is currently getting, or just got, EMD 710s. I believe the other two are to share a similar fate.

The National RR Museum in Green Bay has Milwaukee Road #767, an FM H-10-44, that was acquired in the 1990s, as well as another FM switcher, painted blue, but that was traded to the B&O RR Museum in Baltimore, in exchange for the Pennsylvania RR GG-1 #4890, that was repainted here. The FM #767 was also repainted into MR Orange and black, and was operational for several years to pull that museums train around its tiny circle of track. It now has friction bearings, so will have to be converted before it can return to the mainline, either north on the els rr, or south on the cn/wsor segments from Hilbert to Milwaukee. Historically, Green Bay was the home of these FM diesels until the 1970s, and used daily along the former "ALLEY TRACK", on the east side of the fox river to go to the Proctor and Gamble paper mill that still now produces Charmin tissue paper. But unfortunately, it hasn't run for the past several years, and the museum used to have a MR coach #471 that was donated in 1972 by an extremely respected donor. But 7 years ago in 2009, the museum was being run by an outsider who was definitely NOT a railfan, so he decided to sell it, and many other cars, and 7 diesels, that included another Milwaukee Road unit #38A E9am passenger and commuter engine, and worse, it may have scrapped at the museum itself. It would have completed a matched set of MR Motive power, but only excluding the MR #261 that was rebuilt in Minnesota in 1993. Green Bay almost had this matched set, and would have been able to team up with the Illinois Ry. Mus. in Union, Il., and have twins with their FM 760, EMD 37a, and steam 265. But thanks to the foolish decisions in Green Bay, that once in a lifetime opportunity has been lost forever!