Suitable for:
the SFMES 13.6 mm, (0.535″) tyre width and 3.2 mm, (0.130″) flange depth.
or the GL5 standard of 12.7 mm, (1/2″) tyre width and 3.97 mm (5/32, 0.156″) flange depth
For 5½″ at this scale use 12.4 mm, 0.487″.
Trailing wheels for GN No. 1 until rebuilt in 1880 with 4′ 7″ trailing wheels.
4′ 1″ diam., 12 rectangular spokes, rectangular inner rim, apparent tread 3½″, tyre width 5¼″.
Hub 13″ face dia., 2″ out from the tyre.
Sources: measurements direct from preserved loco No. 1 at NRM, York, June 1995.
The Stirling Singles, Leech and Body, David and Charles (1965), fig 139, photo of No 1 as built in 1870.
Great Northern Locomotive History, RCTS., vol. 2 page 164. (Wheel diameters).
Casting: 110.2 mm tread dia., 93.7 i/d., hub 4.5 mm out from the tyre.
Casting prices and stock . 5 inch gauge loco sets, price list
Scan of a casting in a set for a GN 4-2-2 with prototype photographs.
27 Mar 2013