User:Mliu92/sandbox/Orion V

The Orion V was a line of rigid high-floor transit buses available in 32', 35', and 40' lengths manufactured by Ontario Bus Industries (renamed Orion Bus Industries in 1995) between 1989 and 2009. The conventionally-powered buses, either with longitudinally-mounted diesel or natural gas engines, used a T-drive transmission coupling. The Orion VII replaced the rigid Orion I, and was in turn replaced by the rigid low-floor Orion VI (introduced in 1993) and Orion VII (introduced in 2003).

Design
The two-piece windshield of the Orion V has the driver's windshield canted towards the back of the bus to reduce reflections. The bus was available in both transit (two-door) and suburban (single front door) configurations.

The Orion V uses a welded monocoque steel tube frame clad with steel and fiberglass panels, and an aluminum roof. The interior floor height is 35.75 in except for the vestibule portion starting at the rear wheels, which is slightly lower at 34.5 in. The first step height is 14.5 in for the front (11 in when knelt) and 15.75 in for the rear. All buses, regardless of fuel type, use longitudinally-mounted engines with a T-drive transmission coupling driving the rear axle.

Compressed natural gas (CNG) buses carry their fuel on the roof in eight tanks, with a collective volume of 10440 ft3 at a pressure of 3000 psi, measured at 70 F. Diesel buses were offered with 96, fuel tanks.

Ontario (later Orion) Bus Industries (OBI) marketed the Orion V to both the Canadian and United States transit markets. Canadian buses were assembled at the OBI plant in Mississauga, Ontario. For the US market, to meet 'Buy America' requirements for federally-subsidized transit vehicles, the Orion V was assembled by wholly-owned subsidiary Bus Industries of America (BIA) in Oriskany, New York.

Internally, OBI designated the bus model as 05.50x, with x designating nominal bus dimensions. Known combinations include 05.501 (32' long, 96" wide) and 05.502 (35' long, 102" wide).

Hybrid prototypes
A series hybrid bus was developed by the New York State Consortium using an Orion V 40' chassis equipped with powertrain components supplied by General Electric. This hybrid bus prototype used tandem rear axles driven by four traction motors, one for each wheel. Electric traction power was generated by a Cummins B5.9 diesel engine rated at 190 hp driving a 100 kW alternator, and energy from regenerative braking was stored in nickel-cadmium batteries.

Deployment
The Orion V was OBI's most popular transit bus. The first production bus was sold to Mississauga Transit. Major transit agency users included New York City (MTA), Toronto (TTC), and Washington, D.C. (WMATA). For MTA, some buses in the final order from 1999 were unreliable and plagued with significant structural corrosion.

TTC retired its Orion V fleet in December 2015; the retirement event featured a final 40-minute ride on No. 9411.

Competition

 * Flxible Metro
 * Gillig Phantom
 * New Flyer High Floor
 * Rapid Transit Series