|Displacement cu in /(litre)||1150 ci|
|No. of Cylinders||6|
|Bore in (mm)||6.25in (159mm)|
|Stroke in (mm)||6.25in (159mm)|
|Tyre Sizes (std/options)|
|Front||30.5 x 32|
|Rear||30.5 x 32|
|Length (inches/metres)||30.5 ft (9.3 m)|
|Height (inches/meters)||11 ft (3.4 m)|
|Weight (nominal) lb/kg||54,450 lb (24,700 kg) shipping, 57,580 lb (26,120 kg) wet, 66,139 lb (30,000 kg) field|
|Turning circle (nominal) inches/meters||26.6 ft (8.1 m)|
|Wheelbase||22.2 ft (6.8 m)|
|Factories||Winnipeg, Manitoba, Canada|
|Web site||Reincarnation of the Versatile nameplate, built out of the same factory. http://www.versatile-ag.ca/NA/EN/index.php|
The 1080 Big Roy tractor was designed and built by Versatile in Manitoba, Canada in 1977. Some suggestions say the concept of Big Roy was aimed primarily at large acreage farmers in Australia. Others suggest a battle for bragging rights to have the worlds largest and most powerful tractor had broken out between Steiger and Big Bud. Steiger had been working on their ST650, powered by two Caterpillar 3406B producing a combined 650 hp (480 kW), while Big Bud had the 747, weighing in at 750 hp (560 kW). The 1080 was Versatile's entry in this competition for HP.
Whatever the motive, the 1080 was commissioned by the President and General Manager of Versatile, Roy Robinson as a design study for a high horsepower model that he decided the company needed. What rolled off the designer's table was an 8-wheeled, 600hp, 26 ton machine.grisungar
Powered by a rear mounted 19-litre Cummins KTA-1150, drive was through a 6-speed manual transmission to all four axles. Cooling was via two radiators with a combined capacity of 159 litres (42 US gal) with 2 mechanically driven fans of 28 inches (710 mm) diameter. Articulating between the second and third axles, the articulation joint not only allowed turning and oscillation, but also 10 degrees in vertical movement to enable all 8 wheels to stay in contact with the ground. Unfortunately, whilst the four axle design channelled the tractor's power to the ground efficiently, this was the 1080's ultimate downfall, as the soil in the wheel tracks was found to be highly compacted. The turning circle at 26.6 ft (8.1 m) is comparable to modern 4WD tractors fitted with triple tyres.
The name given to the tractor, 'Big Roy', was in honour of Roy Robinson, the 6'4", larger-than-life, Stetson-wearing character who initiated the build.