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The
first glider trials in Sydney in recent years were successfully carried out by
Jack Lyons at Box Hill, near Windsor NSW, on 13 and 15 February, 1930.
The machine used was a Bronzewing primary training glider,
built by the Lyons Trading Company under the supervision of Alfred Pelton. This
gentleman has had extensive experience on the Continent in glider construction.
It is a surprise when one starts constructing something out
of the common, what difficulty is
experienced in getting together the necessary fittings, and the machinery which
has to be installed to make the various parts. These cannot be purchased and
they have to be made from raw materials. However, there is the compensation of
having the plant for future use.
The glider was constructed from aircraft standard material,
consisting of spruce, American ash, carbon steel, birch, 3-ply, maple and
aeroplane fabric. The wing span was 35ft; the width 5ft 3in; and the weight
170lbs. Its ‘wing loading’ capacity was approximately 2lbs per sq ft, based on
an average pilot weight of 168lbs.
To raise the glider into the air a rope, 60ft in length, was
held by Mr Pelton in a car which was used as the hauling medium. The other end
was, of course, attached to the glider. On the Thursday the wind was
south-east, and we were fortunate in having a very gradual takeoff, permitting
the car to attain top speed quickly.
The glider was placed in position on the level top of a hill,
50 yards from the crest. On either side two assistants held it upright. Upon
the order ‘ready’, the rope began to take the strain, and the glider was
gradually drawn along the ground. Owing to the absence of wheels and shock
absorbers, the takeoff was rather bumpy in comparison with a ‘plane, but as the
machine gathered speed the jolting became less pronounced.
Upon reaching about 15 miles an hour one began to wonder if
it would rise. By this time the top of the hill was reached and the air
currents struck her. In the fraction of a second the glider was 40ft in the
air. If the takeoff is slightly crosswind it soars either to the right or left
like a kite until sufficient speed is developed to allow the controls to become
operative.
Upon straightening out, the glider commenced to overtake the
car, and when it was seen that the rope had given the maximum of lift the pilot
called to the man on the rope to ‘let go’. The rope automatically unhooked
itself, and at that moment the nose was put down slightly to the best glide
angle.
Thereafter it depends upon the force of the wind how far and
how high the glider will go.
The gliding angle is naturally less than a ‘plane, and the
speed seemed to be in the vicinity of 25 to 30 miles an hour. A spot ahead is
picked out where the landing is anticipated, but if you are more fortunate you
will feel the ‘plane lift from a sudden gust of wind, giving more height and
you are able to go further than it first appeared.
The distance covered on the Thursday was between 600 and 700
yards. On the Saturday, owing to a complete absence of wind, it was impossible
to go any great distance.
Landings were slightly more bumpy than when the steady
south-east breeze of Thursday permitted a glide along the ground, keeping a
height of approximately one or two feet, with a gentle landing.’
Although the ‘Bronzewing’ is classified as a primary training
glider and only expected to fly very short distances, if there are steady winds
and ideal gliding conditions, the distance this craft could travel would help
one to realise the reports from other countries of sailplanes remaining aloft
all day.
I feel sure it will require only one flight to make even the
most staid person a glider enthusiast.
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