Optare Sigma
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| Optare Sigma | |
|---|---|
 Atbus Optare Sigma bodied Dennis Lance in 2009 | |
| Overview | |
| Manufacturer | Optare |
| Production | 1994 - 1996 |
| Assembly | Cross Gates, Leeds, England |
| Body and chassis | |
| Doors | 1-2 |
| Floor type | Step entrance |
| Chassis | Dennis Lance |
| Related | Optare Vecta Optare Spectra |
| Powertrain | |
| Engine | Cummins C6T |
| Capacity | 47-51 seated, 24 standing |
| Transmission | ZF Ecomat 4HP500 ZF Ecomat 5HP500[1] |
| Dimensions | |
| Length | 11.8 metres (39 ft) |
| Width | 2.5 metres (8 ft 2 in) |
| Height | 3.2 metres (10 ft) |
| Curb weight | 16,800 kilograms (37,000 lb) |
| Chronology | |
| Successor | Optare Excel Optare Prisma |
The Optare Sigma was a step-entrance single-deck bus body manufactured by Optare between 1994 and 1996 on the Dennis Lance chassis.
Launched in April 1994, the full-size Sigma body was produced exclusively on the Dennis Lance chassis, beginning an effort by Optare to produce bodies for a more diverse range of chassis following the collapse of the United Bus manufacturing group. The Sigma body was constructed using the same Alusuisse bolted aluminium frame system used on the Vecta mid-size bus body, and the styling closely resembled the Vecta, albeit in longer form. Options included guide wheels for use on a guided busway, dual door configuration as well as a centre offside door for use on airport bus services.[1][2][3]
The Sigma had a low entrance step height of 314 millimetres (12.4 in), with a second step taking passengers into a seating compartment with capacity for up to 51 seated passengers; the Sigma's seats were mounted on tracking floor rails, allowing for seating to configured to the individual needs of operators. Other interior features included options for luggage racks and air conditioning, as well as tinted side and rear windows.[2]
