It was in the spring of 1896 that Pilcher built his third glider,
the ‘Gull,’ with 300 square feet of area and a weight of 55 lbs. The
size of this machine rendered it unsuitable for experiment in any but
very calm weather, and it incurred such damage when experiments were
made in a breeze that Pilcher found it necessary to build a fourth,
which he named the ‘Hawk.’ This machine was very soundly built, being
constructed of bamboo, with the exception of the two main transverse
beams. The wings were attached to two vertical masts, 7 feet high, and
8 feet apart, joined at their summits and their centres by two wooden
beams. Each wing had nine bamboo ribs, radiating from its mast, which
was situated at a distance of 2 feet 6 inches from the forward edge
of the wing. Each rib was rigidly stayed at the top of the mast by
three tie-wires, and by a similar number to the bottom of the mast, by
which means the curve of each wing was maintained uniformly. The tail
was formed of a triangular horizontal surface to which was affixed a
triangular vertical surface, and was carried from the body on a high
bamboo mast, which was also stayed from the masts by means of steel
wires, but only on its upper surface, and it was the snapping of one
of these guy wires which caused the collapse of the tail support and
brought about the fatal end of Pilcher s experiments. In flight,
Pilcher’s head, shoulders, and the greater part of his chest projected
above the wings. He took up his position by passing his head and
shoulders through the top aperture formed between the two wings, and
resting his forearms on the longitudinal body members. A very simple
form of undercarriage, which took the weight off the glider on the
ground, was fitted, consisting of two bamboo rods with wheels suspended
on steel springs.
Balance and steering were effected, apart from the high degree of
inherent stability afforded by the tail, as in the case of Lilienthal’s
glider, by altering the position of the body. With this machine Pilcher
made some twelve glides at Eynsford in Kent in the summer of 1896,
and as he progressed he increased the length of his glides, and also
handled the machine more easily, both in the air and in landing. He was
occupied with plans for fitting an engine and propeller to the ‘Hawk,’
but, in these early days of the internal combustion engine, was unable
to get one light enough for his purpose. There were rumours of an
engine weighing 15 lbs. which gave 1 horse-power, and was reported to
be in existence in America, but it could not be traced.
Public-domain text, read in full here on John Shaqi.
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