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Rowington Water Troughs
Rowington water troughs were opened on both the up and down
main line on 1st October 1899 to facilitate non-stop running of express trains
between London and Birmingham. The first water troughs had been introduced on
the Great Western Railway a few years previously. To work they required a
specially designed scoop to be fitted under the tender of the locomotive, which
could be lowered into the water trough by the fireman and the forward motion of
the train would then force water into the scoop and up a pipe into the tender.
The end of the pipe is above the maximum water level and just above it is an
inverted dish to deflect the water down into the tender tank. Vents allow air
to be displaced and an indicator shows the level in the tender tank. The site
at Rowington had all the necessary requirements for a water trough; a long
level and straight section of track without any obstacles, such as level
crossings in the vicinity, an ample supply of good quality water, which did not
require continuous pumping and also adequate site drainage, because it was
inevitable that quantities of water would be splashed during the operation. The
water troughs at Rowington were fairly typical of Great Western Railway
arrangements.
They were 560 yards long; constructed in the standard
method by the use of ten foot lengths of galvanised steel plate 18 inches wide
by 6 inches deep. The troughs were supported 4 inches above the sleepers, which
meant that with the standard 5 inch water depth in the trough the waters
surface was 1.5 inches above the rail level. As it was not possible to end the
troughs with a stop, as this would present a potential obstruction to the
scoop, the track was slightly inclined at each end with a gradient of 1 in 360
over 60 yards. Special free draining ballast was specified to reduce the
deterioration of the permanent way. The water was fed from a 40,000 gallon
supply tank at the lineside and multiple pipes supplied the water troughs via
bottom entry points. The multiple entry points reduced the wave created when an
engine was scooping up water and also ensured that the water in the troughs was
replenished quickly. A sophisticated float arrangement controlled the flow from
the tank to ensure that the water level in the trough was maintained at the
correct level.
Robert Ferris
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