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Baldwin Loco Works official photo, Wb 297, 1898

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NZR Baldwin Locomotive classes

Class T O N Wb Ub Wd Q Aa
Class T O N Wb Ub Wd Q Aa
Wheel arrangement 2-8-0 2-8-0 2-6-2 2-6-2T 4-6-0 2-6-4T 4-6-2 4-6-2
Date built 1879 1885 1885 1898 1898 1901 1901 1914
Weight: total 42.2 45.5 45.2 40.7 57.2 43.7 72.1 88.5
Weight: engine 26.2 29.5 29.2 40.7 35.7 43.7 48.0 50.5
adhesive weight 23.0 25.2 21.0 29.5 26.2 29.2 30.7 34.7
tender weight 16.0 16.0 16.0 - 21.5 - 24.1 38.0
length over buffers 44'10" 46'3" 49'2" 32'9" 49'6" 34'9" 55'4¼" 58'5"
total wheelbase 39'2" 39'10" 42'4" 22'3" 42'8" 27'7" 48'3¾" 50'3"
engine wheelbase 17'10" 18'9" 23'2" 22'3" 20'11" 17'7" 26'3" 27'3"
tender wheelbase 12'7" 12'8" 12'8" - 12'4" - 12'4" 14'6"
coupled wheelbase 11'4" 12'4" 9'6" 10'0" 10'0" 10'0" 9'2" 10'0"
driving wheel diameter 36" 36" 49" 39¾" 49" 39¾" 49" 49"
cylinder diameter 15" 15" 15" 14" 16" 14" 16" 18"
cylinder stroke 18" 18" 20" 20" 20" 20" 22" 24"
grate area, sq.ft 15.7 15.2 16.0 17.3 16.0 17.7 40.0 28.3
heating surface (superheated), sq.ft 812 908 853 845 1320 837 1683 1459 (254)
working pressure, psi 130 130 130 170 175 200 200 170
tractive effort, @80% working pressure 11700 11700 9551 13412 14591 15780 18340 21580
coal bunker capacity, tons 2.1 1.8 1.8 1.3 3.5 2.7 5 5.0
water tank capacity, gallons 1300 1300 1300 850 1700 850 1700 3500