The Boston & Maine Railroad's last purchase of steam locomotives was its
Class R-1 "Mountains" built by the Baldwin Locomotive Works. These eighteen
4-8-2s (road number 4100 through 4117) each weighed 416,100 lbs and
were some of the heaviest 4-8-2s built in the United States. They had
28 x 31 cylinders, 73" drivers, a 240 psi boiler pressure and a tractive
effort of 67,900 pounds.
Each of the B&M "Mountains" carried a name in addition to its road
number. These names were selected from contest entries and were assigned
as noted below.
Thirteen of these locomotives (road numbers 4100 through 4112) were sold to
the B&O in 1947 and the remaining five were retired in 1955 and 1956 and
were scrapped shortly after.
Class R-1 (Locobase 4410)
Data from 1947 Boston & Maine Description of Locomotives books supplied in May 2005 by Allen Stanley from his extensive Raildata collection.
There were four R-1 classes comprising 18 engines -- all were named in contests.
R-1a (1935) works numbers 61822-61826. Loaded weight was 416,100 lb.
4101 Hannah Dustin
4103 Oliver Wendell Holmes
4104 Bee & Emma
4105 Powwow River
R-1b (1937) works numbers 62033-62037. Loaded weight was 416,100 lb.
4106 Little John
4108 Lily Pons
4109 Bumble Bee
R-1c (1939) works numbers 62318-62319, 6232. Loaded weight 414,960 lb
4110 Calvin Coolidge
R-1d (1941) works numbers 62536-62540; weighed 415,200 lb.
4113 Black Arrow
4115 Casey Jones
4116 American Progress
When fitted with 73-in drivers, R-1c had 67,000 lb of tractive effort. Coffin feedwater heaters concealed in the smokebox.
4100-4112 were sold to the B&O in 1947as T-4 class 5650-5612 as the B&M dieselized. The last 5 remained in B & M service until 1955-1956.