The first locomotive produced at Hatcham was a 2-2-2 in December 1848 for the Newhaven Branch of the LBSCR . In 1851 he took part on the Great Exhibition where his patented screw jack and another 2-2-2 locomotive were shown; the locomotive won a Gold Medal.
32.
The screw jacks for closing the ascending caisson to the canal gate proved unsatisfactory, requiring the engine operator to make too fine a stop, within, and a hydraulical accumulator system was later adopted, which could ram the caisson closed over a longer range : up to.
33.
The wings had a flush-riveted Alclad covering and featured both Frise-type ailerons and the interally-developed Gouge flaps, the latter of which were actuated by an electric motor connected via a gearing system and screw jacks, allowing the flaps to be lowered in 60 seconds and elevated within 90 seconds.
34.
At the top of the incline, the caisson was brought close to the end of the upper canal reach; it was then forced close to it by hand-operated screw jacks to obtain a water seal, and two guillotine gates, at the end of the caisson and at the end of the canal respectively, were opened.
