R110B (New York City Subway car)

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R110B
R110B cars 3007 and 3009 at the 207th Street Yard
The interior of an R110B
In service	1993–2000
Manufacturer	Bombardier Transportation[1]
Built at	La Pocatière, Quebec, Canada
Constructed	1992
Entered service	June 15, 1993
Number built	9[1]
Formation	Three-car sets[1]
Fleet numbers	3001–3009
Capacity	54 seated 183 standing (A car), 50 seated 175 standing (B car)[1]
Operators	New York City Subway
Specifications
Car body construction	Stainless steel[1]
Car length	67 ft (20.42 m)[1]
Width	10 ft (3.05 m)[1]
Height	12.08 ft (3.68 m)[1]
Doors	8 sets of 50 inch wide side doors per car
Maximum speed	55 mph (89 km/h)[1]
Weight	Trailer (71,000 lb (32,000 kg)) Motorized (86,000 lb (39,000 kg))[1]
Traction system	GTO–VVVF (GE)
Traction motors	GE GEB 7-B 202 hp (151 kW) 3-phase AC 4-pole asynchronous motors
Electric system(s)	Third rail, 600 V DC[1]
Current collector(s)	Contact shoe
Safety system(s)	dead man's switch, tripcock
Track gauge	4 ft 8+1⁄2 in (1,435 mm) standard gauge[1]

The R110B (contract order R131) was a prototype class of experimental New Technology Train (NTT) New York City Subway cars built by Bombardier of Canada for service on the B Division services. There were nine cars, arranged as three-car sets. They were designed to test features that would be implemented on future mass-production NTT orders.

First announced in 1989, the R110Bs were delivered in 1992 and entered service on June 15, 1993, on the A service. An explosion in 1996 forced three cars to be taken out of service, resulting in the remaining six cars to run on the C service. The six cars not affected by the explosion continued to run until 2000, when they were permanently removed from service due to frequent breakdowns and low Mean Distance Between Failure (MDBF) numbers. Five of the nine cars were sent away to various facilities, with the remaining four still on MTA property.