Union Pacific steam locomotives

Class	Wheel Arr.	Dr. Dia.	Cylinders Dia. x Stroke	Boiler Press.	Ad. Wt.	EW WO	Grate Area	Evap. Surface	Sup. Surface	Remarks
TTT	2-10-2	63in	29½x30in	200psi	130t	162t	84sq.ft.	5150sq.ft.	1260sq.ft.	5000
FTT	4-10-2	63in	25x28(1):30in	210psi	137t	183t	84sq.ft.	5490sq.ft.	1375sq.ft.	Simple
FTT	4-10-2	63in	27x32in	230psi	140t	185t	84sq.ft.	5460sq.ft.	1375sq.ft.	Rebuilt
UP	4-12-2	67in	27x31(1):32in	220psi	169t	234t	108sq.ft.	5855sq.ft.	2560sq.ft.	Simple
MT	4-8-2	73in	29x28in	200psi	104t	157t	84sq.ft.	4975sq.ft.	1240sq.ft.	7000
FEF-1	4-8-4	77in	24½x32in	300psi	122t	211t	100sq.ft.	4600sq.ft.	1475sq.ft.	800
FEF-2	4-8-4	80in	25x32in	300psi	122t	219t	100sq.ft.	4470sq.ft.	1900sq.ft.	820
FEF-3	4-8-4	80in	25x32in	300psi	123t	223t	100sq.ft.	4295sq.ft.	1400sq.ft.	835
3600	2-8-8-0	57in	26/41x32in	210psi	211t	225t	88sq.ft.	5410sq.ft.	1400sq.ft.	Mallet
3500	2-8-8-0	59in	23x30in(4)	220psi	220t	235t	88sq.ft.	5410sq.ft.	1400sq.ft.	Ex Mallet
C-57 22	2-8-0	57in	22x30in	200psi	87t	97t	50sq.ft.	2900sq.ft.	575sq.ft.	560-622
MC 57	2-8-8-2	57in	25/39x32in	270psi	217t	241t	96sq.ft.	5755sq.ft.	1580sq.ft.	N&W Y3
SA 57	2-8-8-2	57in	23x32in(4)	215psi	223t	256t	112sq.ft.	6415sq.ft.	1885sq.ft.	C&O H-7
CSA	4-6-6-4	69in	22x32in(4)	255psi	175t	259t	108sq.ft.	5380sq.ft.	1650sq.ft.	Challenger
4664	4-6-6-4	69in	21x32in(4)	280psi	184t	288t	132sq.ft.	4640sq.ft.	1740sq.ft.	Challenger
4884-1	4-8-8-4	68in	23¾x32in(4)	300psi	250t	345t	135sq.ft.	5890sq.ft.	2465sq.ft.	Big Boy
4884-2	4-8-8-4	68in	23¾x32in(4)	300psi	247t	350t	150sq.ft.	5755sq.ft.	2045sq.ft.	Big Boy