AEC Bridgemaster

The AEC Bridgemaster was a front-engined low-height double-decker bus chassis manufactured by AEC from 1956 to 1963.

AEC Bridgemaster
Park Royal bodied AEC Bridgemaster (forward-entrance)
Overview
Manufacturer	AEC
Production	1956–1963
Assembly	Southall, England
Powertrain
Engine	7,702 cubic centimetres (470.0 cu in; 7.702 L) AEC AV470 Inline 6 Turbo-diesel (first two prototypes) 9,668 cubic centimetres (590.0 cu in; 9.668 L) AEC AV590 Inline 6 NA
Power output	AEC AV470: 120 brake horsepower (120 PS; 89 kW) @ 2,300 rpm 1,200 newton-metres (890 lbf⋅ft) @ 1,700 rpm AEC AV590: 128 brake horsepower (130 PS; 95 kW) @ 1,800 rpm 430 pound-feet (580 N⋅m) @ 1,000 rpm
Transmission	4-speed AEC synchromesh
Dimensions
Wheelbase	5,029 millimetres (16.5 ft)
Length	9,144 millimetres (30 ft)
Width	2,438 millimetres (8 ft)
Height	4,130 millimetres (13.55 ft)
Curb weight	7,350–7,470 kilograms (16,204–16,469 lb)
Chronology
Successor	AEC Renown

History

The AEC Bridgemaster was introduced by AEC in 1956 to meet the demand of low-height double-deckers from municipal and independent bus operators across the United Kingdom, which were barred from purchasing the Bristol Lodekka. It was designed as a fully-integral vehicle, utilising two sub frames like the contemporary Routemaster.^[1] Four pre-production examples were bodied by Crossley with an aluminium body; production examples bodied by Park Royal were introduced from 1958 with steel body frames at the request of British Electric Traction.^[2]

In 1960 a forward-entrance version with slightly different driveline layout was introduced.^[3] A total of 180 were produced before it was superseded by the AEC Renown in 1963.^[4] East Yorkshire Motor Services were the largest customer, purchasing 50.^[2][5][6]

• 
  AEC Bridgemaster initial styling concept.^[7]
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  Rear-entrance AEC Bridgemaster chassis layout.^[8]
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  AEC Bridgemaster body frame.^[7]
• 
  First pre-serial AEC Bridgemaster, registration YDH225, chassis number MB3RA001, bodywork by Crossley with H41/31R layout, entered into service with Walsall in Nov. 1956.^[7][6]
• 
  Second pre-serial AEC Bridgemaster, registration 9JML, chassis number MB3RA002, bodywork by Crossley with H41/31R layout,^[6] in the service of the Birmingham Corporation.^[7]