The Orion-Ikarus 286, commonly known as the Orion III, was an articulated bus marketed to Canadian transit operators by Ontario Bus Industries (OBI). It was produced as a joint venture between Ikarus Body and Coach Works and OBI from 1985 to 1989, and deployed primarily in Ottawa (for OC Transpo) and Toronto (for the TTC). The Orion III fleets were retired prematurely due to corrosion, and all examples were withdrawn from service by 2003.

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Orion-Ikarus III 286
An Orion-Ikarus bus of OC Transpo on display at Expo 86
Overview
Manufacturer	Ikarus Ontario Bus Industries
Production	1985-1989
Assembly	Budapest, Hungary (unfinished shell) Mississauga, Ontario (finishing)
Body and chassis
Class	Transit bus
Body style	articulated
Layout	Mid-mounted engine/"puller"
Related	Crown-Ikarus 286
Powertrain
Engine	Cummins NHHTC-300[1]
Transmission	4-speed Allison HT747 or HTB748[1]
Propulsion	Diesel
Dimensions
Length	59 ft 7 in (18,160 mm) over bumpers[1]
Width	102 in (2,600 mm)[1]
Height	124 in (3,100 mm)[1]
Curb weight	37,979 lb (17,227 kg)[1]
Chronology
Successor	Ikarus USA/NABI 436

Close

Rolling Ikarus 280 shells (frame and body) were built by Ikarus in Hungary, with modifications to conform with standard Canadian transit bus dimensions, and then shipped to OBI's plant in Mississauga, Ontario via Montreal, where final assembly (including the installation of a domestic powertrain, doors, windows and seats) was performed.^[2] The Orion III was built from 1985 to 1989.^[3] Local assembly also was used for the similar Crown-Ikarus 286 for the United States, finished and sold by Crown Coach Corporation in Los Angeles for the United States transit market.

The bus used a "puller" design, with the engine driving the middle axle.^[3] All three axles were built by Rockwell International; the non-powered front and rear axles were Model FL-941, and the powered middle axle was Model 59742W, equipped with a standard 4.56:1 drive ratio.^[1]

One demonstrator vehicle was assembled in 1984. It was later leased by Transit Windsor in June 1985 for service through the Detroit–Windsor Tunnel, then was sold to St. Catharines Transit in 1988. Eventually, the 1984 demo model was sold to OC Transpo (serving Ottawa, Ontario) for parts.

The first production contract was awarded to OBI by OC Transpo in November 1984. This was followed by an order from Toronto Transit Commission (TTC) for 90 buses in October 1986; the cost of the TTC contract was CA$29 million.^[4] As delivered for TTC, the Orion III had 61 seats and had a crush capacity of 107 riders.^[5] The first nine Orion III buses for TTC were delivered in 1987 for acceptance testing, with revenue service anticipated to start in early 1988.^[6]

In service, the Orion III prematurely developed corrosion,^[7][8][9] and were retired starting in 1995. By 2003, both OC Transpo and TTC had completely retired their Orion III fleets.^{[3][10][11][12]}

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