Bachmann makes a small 4-4-0 in On30 which is perfect for 55n3. In Scale55 it represents a late 1880's 4-4-0. The deckless design is not typical of most narrow gauge 4-4-0's, the firebox extends through the cab. Most narrow gauge locomotives had the firebox stopping before the last axle. See below for the fix.
Objects aren't "N, HO...S, O, etc. SCALE". An object is what it measures.
That is the idea behind 55n3, we are taking models from other scales and converting them to 55n3. No one makes 55n3, Bachmann makes models that can be used in 55n3 because they match plans in Scale55. That is why we have a scale rule. Measure a model, if it is the right size for Scale55 it is Scale55. The Bachmann On30 equipment is small O scale narrow gauge, but put a Scale55 ruler on the equipment and it becomes 55n3. Now it is realistic three foot equipment.
The locomotive matches up with a scaled photo of a small three foot narrow gauge 4-4-0. (Click image to enlarge)
The cab has a detailed backhead. This is a "deckless" cab with the firebox extending through the cab. See Bill Allen's conversion below.
The locomotive comes with a set of accessories to make a woodburner or oil burner and steps for the pilot.
Bachmann's 55n3 4-4-0 matches our lowered Bachmann 55n3 boxcars.
The locomotive also looks good with Bachmann's 55n3 Passenger cars.
How does it run? Great, the locomotive looks good on 18" radius curves and will handle 10 to 12 freight cars and three or four passenger cars easily. It has an eight pin plug and a dual DCC/DC decoder. It has a socket for a 28mm(1 inch) diameter speaker in the tender frame.
The Bachmann 55n3 4-4-0 makes it possible to model in 55n3 easily with a fine piece of motive power.
Larger drivers can be added. These are Bowser HO 69" diameter or Scale55 44".
The drivers scale out to 38" diameter.
Bill Allen's 4-4-0 Modification
Bill Allen's Bachmann On30 4-4-0 conversion was posted on Railroad-line Forum as On30 in the fall of 2010. Sure looks like 55n3. It is possible to model early narrow gauge with an inexpensive 4-4-0.
Bill's conversion eliminates the deckless configuration that was rare on narrow gauge 4-4-0's.
How does it compare to later narrow gauge 4-4-0's. Matches this 1897 Rogers 4-4-0.
(Click image to enlarge)
Found this S Scale cab at the "Willy Monaghan S Scale" shop on Shapeways to replace the funky original cab. Much closer to the Rogers.