O scale refers to a model railroad train that is 1/48th the size of a real train—in the U.K., O scale trains are generally 1/43rd the size of the real thing while in Europe they are 1/45th as big. Like a real train, O scale model railroad trains run on two-rail tracks. The gauge of those tracks is O, which describes tracks whose rails are 1 ¼ inches apart. Even though O scale model trains frequently run on O gauge tracks, strictly speaking, the two Os have nothing to do with each other.
The letter "O" is actually a misnomer since the designation was initially conceived to identify trains that were smaller in scale than 1, which had been the standard. Since the only number smaller than 1 is 0, that’s how early O scale trains and O gauge tracks were identified. Similarly, HO was originally intended to describe a scale and gauge that is half (H) of zero, but the letter O (pronounced “owe”) crept into everyday use among model train buffs and has remained the way to refer to zero ever since.
Confused? A lot of people are. But for those who are first and foremost focused on O scale, nothing else matters. For these enthusiasts, replicating the detail of a full-scale train in an equally detailed layout is the only goal.
An O scale model train’s tracks, as it turns out, are a key part of creating a sense of realism. When an O scale train is run on three-rail O gauge tracks (the middle rail delivers the power to the locomotive) such as those made by Lionel, the train rides higher off the surface than it would in real life, thus shattering the illusion. Model railroaders who run O scale trains on three-rail tracks are known as hi-railers. It’s not quite a put down, but it isn't really a compliment, either.
Toy manufacturers in the early part of the 20th century originally embraced the O scale so they could offer customers model trains that took up less space than their standard-sized counterparts. Because they were smaller, these trains were also less expensive. At one time or another, Märklin, Lionel, MTH, Williams, Atlas, and Weaver, among others, all offered O scale trains. Fans of brass model trains are also frequently O scale acolytes because the earliest, most collectible brass trains made in postwar Japan were usually O scale.
The smaller scale took off in the 1930s, when affordability trumped most other concerns thanks to the Depression. The scale also benefited from its adoption by industry leader Lionel, which sold two O gauges for its O scale trains. Lionel’s regular O gauge track was the same width as its O-27 gauge track (1 ¼ inch), but the O-27 had a lower profile than regular O, and its thinner rails allowed all but the longest O scale model trains to make tighter turns (a circle of O-27 tracks has a diameter of 27 inches instead of 31).
Today, neither appeal to O scale purists who put accuracy and authenticity above mere convenience. There is even a vocal contingent of two-rail O scale enthusiasts who advocate for the conversion of model trains designed to run on three-rail tracks to model trains that will run on just two. This often requires changing a train’s trucks (the framework for the axles and wheels) as well as a layout’s wiring (from AC to DC), but the lower profile that results makes an O scale model train look a lot less like a toy and more like the real thing.
Best of the Web (“Hall of Fame”)
Airfix Model Railways
Postwar Lionel Trains Library
Tech Model Railroad Club of MIT
Clubs & Associations
- Train Collectors Association
- National Model Railroad Association
- Lionel Collectors Club of America
- Toy Train Operating Society
- National Association of S Gaugers, Inc.
- Train Collectors Society
- Lionel Operating Train Society
Other Great Reference Sites
Most watched eBay auctions
Recent News: O Scale Model Trains
Source: Google News
Greater Cincinnati's model train displays will take you on a nostalgic ride ...WCPO, November 29th
3, EJ is offering its free-admission seasonal exhibit, “Christmas at EnterTRAINment Junction,” with three displays in a huge expo center; a Lionel train O-Scale display originally exhibited at the Children's Museum in Indianapolis; a miniature HO-Scale...Read more
Weekend calendarHerald-Mail Media, November 27th
O-scale, three-rail Christmas layout with steam and diesel trains by Lionel, MTH, Williams, Weaver and others, operating in a snow scene, and additions to the miniature Western Maryland Roundhouse. Call 301-739-4665 or go to www.roundhouse.org...Read more
Model train club plans open houseLe Mars Daily Sentinel, November 26th
(Sentinel photo by Beverly Van Buskirk) John Schneider, a member of Floyd Valley Model Railroad Club, explains the layout to children at the Plymouth County Historical Museum's May Day celebration. Club members will host a Christmas open house this ...Read more
Kids briefs: Heroes honored at Children's MuseumTribune-Review, November 25th
Inside the museum is the seasonal Lionel toy train layout with O-scale trains and a Lego layout. Santa Trolley runs from 10 a.m. to 5 p.m. Nov. 27 through 29 and Dec. 5, 6, 12 and 13. The last trolley with Santa leaves each day at 4 p.m. Bring a camera...Read more
Train Show this weekendPortsmouth Daily Times, November 25th
James wasn't sure of the number of years he has been back displaying his trains, since he took several years off. Now he displays an O-scale set. “I haven't kept track, but I have been doing this for several years now. Since they moved over hear most...Read more
Good Morning: Christmas Train Exhibit coming to Madison County History CenterThe Herald Bulletin, November 23rd
There will be HO, On30, O Scale Traction, O-27 Lionel, N scale, S Gauge American Flyer layouts, and an HO Ringling Bros and Barnum, and Bailey 1946 HO scale circus train on display. Changes have been made to several of the layouts on display...Read more
Model railroad tour delights crowds, displays detailed craftsmanshipSt George News, November 13th
This G scale garden railroad features a kaleidoscopic circus complete with train and a wealthy horse breeder with a private landing strip on his ranch as well as many other details for guests to delight in. Meyers, along with his wife, work together on...Read more
Model Railroad tour takes train enthusiasts for a rideSt. George Daily Spectrum, November 11th
Just one of 12 model railroad systems that will be open to the public this weekend during the Color Country Model Railroad tour, Schneider's G-scale, or Garden-scale outdoor trains, chug along through a miniature world he has created in the backyard of...Read more