Volvo Ailsa B55
|Volvo Ailsa B55|
|Body and chassis|
|Floor type||Step entrance|
|Successor||Volvo B10M Citybus|
The B55 was designed with a front mounted engine that still allowed a front entrance position suitable for one-person operation. In this sense there was a common goal with the earlier, unsuccessful, Guy Wulfrunian. It was fitted with the Volvo TD70 engine, a compact turbocharged unit of 6.7-litres. The rest of the design was relatively simple, with beam axles and leaf springs. A Self-Changing Gears semi-automatic gearbox was used. It first appeared at the 1973 Scottish Motor Show.
The most popular bodywork was the Alexander AV type, replaced by the R type from the earlier 1980s. The Falkirk based Alexander factory thus meant that the Alexander bodied Ailsa B55s were entirely built in Scotland, a significant factor in securing Scottish orders (notably from the Scottish Bus Group, Strathclyde Passenger Transport Executive and Tayside Regional Council) especially given the ease in securing locally sourced spare parts and repairs.
In 1977, an improved Mark II version appeared, with two transmission options offered, a Self-Changing Gears pneumocyclic unit and a Voith D851 with retarder. It was followed in 1980 by a Mark III version, for which the Ailsa name was dropped. This continued to use the Volvo TD70H turbocharged engine, and utilised a Volvo truck rear axle in place of the previous troublesome axle. Air suspension was also an available option. In 1981, a 3-axle version was developed to meet the demand for 3-axle buses in Asia.
Following the end of production in 1985, the Ailsa B55 was effectively replaced by the mid-engined Volvo B10M Citybus.
The B55 was popular with the Passenger transport executives with significant purchases made by West Midlands and South Yorkshire and to a lesser degree Merseyside and Tyne & Wear. Ayrshire independent operator A1 Service, whose operating area included the Ailsa plant in Irvine, also purchased several of the vehicles new, increasing its fleet where it could through the purchase of used vehicles.
As part of its Alternative Vehicle Evaluation program, London Transport took delivery of three Mark III vehicles in 1984. The program was intended to evaluate alternative vehicle types for future fleet replacement in London, which at that time was purchasing Leyland Titans and MCW Metrobuses.
The most interesting of the three vehicles was fleet number V3. This vehicle maintained the usual front entrance door, but had an additional exit behind the rear axle, and a second staircase adjacent. This had the advantage of improving passenger flow during loading and off-loading at peak times. But, the second staircase created a blind spot for the driver, and the vehicle was restricted to crew operation. The vehicle remained unique, although London Buses rebuilt the rear, removing the doors, but leaving the staircase in place. After a fatal crash on a stormy night in which V3 crashed into a Mini and turned over on its side, the bus was sold for scrap. V3 was rescued from a scrap dealer by Black Prince Buses, and extensively rebuilt, retaining both staircases. In March 2006, it was purchased by Roger Wright's London Bus Company and can now be seen restored to London condition at rallies and running days across Southern England.
No further orders for new B55s were placed by London Transport, but numerous second-hand examples were purchased from the South Yorkshire and West Midlands PTEs in the late 1980s.
A solitary Ailsa chassis was bodied as a single-deck bus by Marshall for Strathclyde PTE. Later, the same operator created a second single-decker, by converting an Alexander-bodied double-decker, the upper deck of which had been damaged.
A number of 2-axle Ailsa B55 were sold overseas. Indonesia received 320 buses between 1981 and 1985. China Motor Bus in Hong Kong received eight between 1975 and 1978 (six out of these eight buses were destroyed by fire). One B55 was exported to Singapore as a demonstrator for Singapore Bus Services and another to Bangkok.
A total of three 3-axle Ailsa B55s were built for export, two were sold to China Motor Bus as demonstrators, and the third was exported to Indonesia.
In all, just over 1,000 B55s were built, 890 of them being bodied by Alexander. Of the remainder, 64 Ailsas received unusual Van Hool McArdle bodies built in Dublin - 62 buses for the South Yorkshire PTE and two for A1 Service, Ayrshire. Northern Counties bodied some for Derby Corporation.
The last significant number of Ailsas in service in the UK were operated by Cardiff Bus, who had 18 in regular service in 2007. They were withdrawn at the end of 2007 and replaced by new Scania double-deckers. However as at February 2014, ten Ailsas remain in service for school work, school contracts and rail replacement with Edwards Coaches of South Wales.
- Volvo buts control in Ailsa Commercial Motor 30 June 1972
- Over 90 per cent British content in Ailsa decker Commercial Motor 2 November 1973
- SBG orders 40 Ailsas Commercial Motor 7 June 1974
- Alisa sells 1975 production Commercial Motor 21 February 1975
- Low-bridge Ailsa decker Commercial Motor 12 December 1975
- Options Commercial Motor 29 September 1978
- New name for Ailsa Commercial Motor 27 July 1979
- Double Volvo launch Commercial Motor 4 October 1980
- Volvo threat to BL in city-bus market Commercial Motor
- Volvo's Irvine plant thrives on worldwide travel Commercial Motor 12 May 1984
- Volvo buses Commercial Motor 29 May 1982
- Tyne sells off Ailsas Commercial Motor 3 August 1979
- LT's off-the-peg buses Commercial Motor 30 July 1983
- Volvo deckers arrive in London Commercial Motor 16 June 1984
- The London Transport Volvo Alisas Ian's Bus Stop
- Volvo wins share of new Jakarta order Commercial Motor 29 June 1985
- Ailsa for Kowloon Commercial Motor 17 November 1978
- British B55 weans praise in Colony Commercial Motor 1 December 1979
- £1.1 million sale Commercial Motor 8 September 1978
- Bangkok likes deckers Commercial Motor 16 February 1979
- Yes to jumbo underframe Commercial Motor 28 March 1981
- Volvo B55 Bus Lists on the Web
- First Irish-bodied Ailsas Commercial Motor' 2 April 1976
- Derby's trad deckers Commercial Motor 2 March 1979
- Cardiff policy changes Commercial Motor 24 August 1979
- Last Ailsa DayCardiff Bus
- Stock List Glasgow Vintage Vehicle Trust 23 September 2014
- Home The 388 Group
- Jack, A.D. (1997). Volvo Bus: 25 Years of Progress. Venture Publications Ltd. ISBN 1-898432-52-X.
- Booth, Gavin (1983). The British Bus Today and Tomorrow. London: Ian Allan Ltd. ISBN 0-7110-1296-2.
- Townsin, Alan (1985). The British Bus Story - The Late 'Seventies - The Calm Before the Storm. The Transport Publishing Company. ISBN 0-86317-150-8.
Media related to Volvo Ailsa B55 at Wikimedia Commons