Chesapeake and Ohio class T-1

{{Short description|American steam locomotive}}

{{more citations needed|date=January 2022}}

{{Infobox locomotive

| name = C&O T-1 class

| image = C & O Helper Engine (2444740513).jpg

| alt =

| caption = C&O T-1 locomotive No. 3021 in May 1941

| powertype = Steam

| designer = Advisory Mechanical Committee

| builder = Lima Locomotive Works

| ordernumber = 1122

| serialnumber = 7516–7555

| buildmodel =

| builddate = 1930

| totalproduction = 40

| rebuilder =

| rebuilddate =

| numberrebuilt =

| website =

| whytetype = 2-10-4

| uicclass = 1′E2′ h2

| driver =

| gauge = {{track gauge|ussg|allk=on}}

| leadingdiameter = {{convert|33|in|mm|0|abbr=on}}

| driverdiameter = {{convert|69|in|mm|0|abbr=on}}

| trailingdiameter = {{convert|36|in|mm|0|abbr=on}}
{{convert|43|in|mm|0|abbr=on}} (trail axle)

| tenderdiameter = {{convert|36|in|mm|0|abbr=on}}

| minimumcurve = {{convert|338|ft|m|0|abbr=on}} radius / 17°

| wheelbase = {{convert|99|ft|5+3/4|in|m|2|abbr=on}} (Total)

| engine total =

| leading =

| drivers =

| coupled =

| trailing =

| tender total =

| tendertruck =

| tenderbogie =

| pivotcentres =

| wheelspacing =

| length = {{convert|111|ft|5+1/8|in|m|2|abbr=on}}

| over couplers =

| over bufferbeams =

| width = {{convert|11|ft|3|in|m|2|abbr=on}}

| height = {{convert|16|ft|7|in|m|2|abbr=on}}

| frametype = Built-up

| axleload = {{convert|75000|lb|ST|abbr=on}}

| leadingbogie/pony =

| coupled all =

| coupled 1 =

| coupled 2 =

| coupled 3 =

| coupled 4 =

| coupled 5 =

| coupled 6 =

| coupled 7 =

| coupled 8 =

| trail bogie/pony =

| tenderbogieload =

| tenderaxle =

| weightondrivers = 373,000 lb (186.5 tons)

| locoweight = 566,000 lb (283 tons)

| tenderweight = 415,000 lb (207.5 tons)

| locotenderweight = 981,000 lb (490.5 tons)

| tendertype = 23-RA

| fueltype = Coal

| fuelcap = 30 tons (60,000 lb)

| watercap = 23,500 US gallons

| tendercap =

| sandcap = {{convert|72|ft3|m3|abbr=on}}

| fireboxtype =

| firearea = {{convert|121|sqft|m2|abbr=on}}

| boiler = Fire Tube

| boilertype =

| pitch =

| diameterinside = {{convert|108|in|0|abbr=on}}

| lengthinside = {{convert|21|ft|m|0|abbr=on}}

| boilerpressure = 265 psi (1933-)
260 psi (As built)

| safetyvalvetype = Pop, {{convert|3+1/2|in|mm|0|abbr=on}}
4 per locomotive

| feedwaterheater = Worthington 6-S
12,000 US gal / hr capacity

| totalsurface = {{convert|6623.5|sqft|m2|0|abbr=on}}

| tubearea =

| archarea = {{convert|168.5|sqft|m2|0|abbr=on}}

| fluearea =

| tubesandflues = {{convert|5978|sqft|m2|0|abbr=on}}

| fireboxarea = {{convert|477|sqft|m2|0|abbr=on}}

| superheatertype = Type E

| superheaterarea = {{convert|3030|sqft|m2|0|abbr=on}}

| cylindercount = Two

| cylindersize = {{convert|29|x|34|in|mm|0|abbr=on}}

| frontcylindersize =

| rearcylindersize =

| hpcylindersize =

| lpcylindersize =

| valvegear = Baker-long travel

| valvetype = Piston

| valvetravel = {{convert|9|in|mm|0|abbr=on}}

| valvelap = {{convert|1+15/16|in|mm|0|abbr=on}}

| valvelead = {{convert|3/16|in|mm|0|abbr=on}}

| transmission =

| trainheating =

| locobrakes = Pneumatic, Schedule 6-ET

| locobrakeforce =

| trainbrakes = Pneumatic

| safety =

| coupling =

| maxspeed = {{convert|60|mph|abbr=on}}

| poweroutput = {{convert|5200|hp|abbr=on}} @ {{convert|41|mph|abbr=on}} (drawbar)

| tractiveeffort = 93,350 lbf (Engine)
15,275 lbf (Booster)
108,625 lbf (Total)

| factorofadhesion = 4.00 (Engine)
4.32 (Booster)

| operator = Chesapeake and Ohio

| operatorclass = T-1

| powerclass =

| numinclass =

| fleetnumbers = 3000–3039

| officialname =

| nicknames =

| axleloadclass =

| locale =

| deliverydate =

| firstrundate =

| lastrundate =

| retiredate = 1952–1953

| preservedunits =

| restoredate =

| scrapdate =

| currentowner =

| disposition = All scrapped

| notes =

}}

The Chesapeake and Ohio T-1 was a class of forty 2-10-4 steam locomotives built by the Lima Locomotive Works in 1930 and operated until the early 1950s.