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Runway showing cut by-pass

Runway showing cut by-pass

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G2705. An aerial view of the main east/west runway taken after its completion for the Brabazon project. The new by-pass which, together with Charlton village was sacrificed to build it. Some facts on the runway. It is 2,725 yards long by 100 yards wide. There is a further 50 foot safety strip either side. The end turning circles are 200 yards in diameter.
The base contains 400,000 tons of hard core, in three 8 inch layers, all machine rolled. On top is 70,000 cubic yards of concrete sub base 8 inches thick. The top layer is 105,000 cubic yards of fine concrete which was laid in bays 20 feet wide by 12 inches deep. The safety strip has a hard core base and a top layer of compacted limestone and ballast, nearly 500,000 cu. yds. of material. Depth of excavation for the runway varied from 8 inches to 14 feet. Roughly 1,000,000 cu. yds. of excavation were made, and some 655,000 cu.yds. of soil were used to fill natural depressions, old well, cess pits etc.
The runway rises through a 1:75 gradient and drops away in a 1:85 gradient. The special balancing reservoir at the eastern end will hold a maximum of 3,000,000 gallons of storm water.
Nine miles of cable were laid, encased in concrete, to supply lighting installations, etc. Runway lighting comprises 140 contact light fittings at 100 ft intervals, each with a power of roughly 1,000 candle power.
Approach lighting extends 4,500 feet beyond each end of the runway and consist of 140-watt sodium approach lamps at 300 feet.
Taxi way fittings from runway to assembly Hall have blue glass filters and are spaced at 100 ft intervals.
Red warning lamps are fixed to all points in works and neighbourhood of possible danger to night flying aircraft.
The taxi way crosses the branch line by the largest level crossing in the world. They were when built the only power operated level crossing gates in the world. They are 110 feet wide and protected by a fence of 4 ft 6 inches.
PublisherRolls Royce plc
ContributorRolls-Royce Heritage Trust
Creatorcorporatename - Rolls Royce Plc
Datecreation - Circa 1974
TypePhotographic prints - Black and White
Formatdimension.H - 180 mm
dimension.W - 240 mm
SourceRolls-Royce Heritage Trust
Relationbased on - Brabazon
CoverageLocation.Creation Site - Filton, South Gloucestershire
RightsRolls-Royce plc