Class 1551 (Locobase 1354)

Data from IC 1913a Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive collection. Works numbers were

1911

May 36577-36581; July 36641-36660, 36714-36716; August 36745-36746, 36757-36761, 36810-36814; October 37030-37039; November 37176-37180, 37254-37258; December 37402-37405.

1912

January 37443-37467, 37482-37490; February 37502-37503, 37507-37508; October 38563-38573; November 38664, 38724-38859.

Design by Edward C. Harriman. These were built by Baldwin and Lima. Baldwin delivered the first 150 in 1911-1912. As delivered, their fireboxes were essentially unadorned and relatively small. All of the Mikes in this long run had 15" piston valves. Some in this large stud of 2-8-2s were later fitted with 60 sq ft of circulators, which increased firebox heating surface to 293.2 sq ft

Class 1600 (Locobase 7044)

Data from IC 1913a Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive collection. Works number was 38859 in November 1912.

All of the Mikes in this long run of 2-8-2s delivered to the IC had 15" piston valves. This one apparently differed initially in the use of a Gaines combustion chamber. Later modifications would lead to a very different boiler.

Class 1600 - with syphons (Locobase 11187)

Data from IC 4 - 1930 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive collection.

The IC had a lot of Mikados to work with when it began investigating such boiler updates as thermic syphons in the firebox and increased superheater area. For its guinea pig, it seems to have chosen the odd-ball 1600, which was completed in 1912 with a Gaines combustion chamber that shortened tubes by almost 3 feet. In the 1920s, the shops fitted this locomotive with a new boiler that had 64 sq ft of syphons adding to the firebox heating surface.

Class 1701 (Locobase 7045)

Data from IC 4 - 1930 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive collection.

As noted in Locobase 1354, the run of Mikado production for the IC was long and relatively unvaried. But different builders managed to alter the specs just slightly. All of the Mikes in this long run had 15" piston valves.

This particular series of batches -- mostly from Lima -- may have represented one of the first really big orders for that builder once it entered main-line steam locomotive production. Builders' numbers ran: 5005-5014 delivered in 1915, 5162-5208 in 1916. Baldwin added 35 in 1918. Lima added to the stud with 50 more (builders' #5696-5745) in 1919

Class 1800 (Locobase 9471)

The data comes from the IC 1955 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive collection.

A Locobase reader should not take the count of engines as gospel - few lists are more confusing than the IC's rebuilds. Take, for example, this group of 21 engines neatly grouped under one set of road numbers. There are Baldwins, Limas, and Schenectadies ranging in birth date from 1914 to 1923.. Many other series of locomotives could have been shown.

Also observe that on the single diagram, three different boilers are shown. All have 60 sq ft of security circulators in addition to the combustion chamber; one version (shown in the specs) has 203 tubes, the other 199. The third variant didn't have a combustion chamber, which meant it retained the 20-ft, 6-in tube length, as well as 256 fire tubes.

Class 1883 (Locobase 7046)

Data from IC 4 - 1930 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive collection. Works numbers ran from 63611 to 63635.

Although following the general lines of the big Mikado program that supplied over 500 2-8-2s to the IC between 1911 and 1923, this small batch of Schenectady engines is shown with more than 200 sq ft less superheater area. Locobase doesn't know why there would be such a difference. The last batches procured later the same year (Locobase 20) reverted to the larger superheat area. This may be an instance of a combustion chamber taking up space in the boiler, but the evaporative heating surface was unchanged. So was the firebox heating surface, which included 31.6 sq ft of arch tubes. All of the Mikes in this long run had 15" piston valves.

Class 1908 (Locobase 20)

The data comes from the IC 4 -1930 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive collection.

The last 125 of a series that began in 1911 as a design by Edward C. Harriman. These were built by Baldwin, Alco-Schenectady, and Lima. Firebox heating surface included 15.8 sq ft of arch tubes, 64 sq ft of Nicholson thermic syphons. All of the Mikes in this long run had 15" piston valves.

Many of the earlier Mikados were rebuilt using similar boiler pressures and firebox changes. See Wes Barris's entry on IC Mikados at http://www.steamlocomotive.com/mikado/ic.shtml (accessed 20 March 2006).