In 1952 Canadian Domina Jalbert patented a
governable gliding parachute with multi-cells and controls for lateral
glide.[2]
In 1954, Walter Neumark predicted (in an
article in Flight magazine) a time when a glider pilot would be "able to
launch himself by running over the edge of a cliff or down a slope ... whether
on a rock-climbing holiday in Skye or ski-ing in the Alps."[3]
In 1961, the French engineer Pierre
Lemongine produced improved parachute designs that led to the Para-Commander.
The PC had cutouts at the rear and sides that enabled it to be towed into the
air and steered,滑翔伞, leading to parasailing/parascending.
Domina Jalbert invented the Parafoil, which
had sectioned cells in an aerofoil shape; an open leading edge and a closed
trailing edge, inflated by passage through the air – the ram-air design. He
filed US Patent 3131894 on January 10, 1963.[4]
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The next step in the launch is to bring the
wing into the lift zone. There are two techniques for accomplishing this
depending on wind conditions. In light wind this is usually done after turning
to the front, steering with the feet towards the low wing tip, and applying
light brakes in a natural sense to keep the wing horizontal. In stronger wind
conditions it is often found to be easier to remain facing downwind while
moving slowly and steadily backwards into the wind.
Knees bent to load the wing, foot
adjustments to remain central and minimum use of Cs or Brakes to keep the wing
horizontal. Pirouette when the feet are close to lifting. This option has two
distinct advantages. a) The pilot can see the wing centre marker (an aid to
centring the feet) and, if necessary, b) the pilot can move briskly towards the
wing to assist with an emergency deflation.
With either method it is essential to check
"traffic" across the launch face before committing to flight.
A paragliding flight over the Mussel Rock
Gliding Bluffs in Pacifica, California
In
flatter countryside, pilots can also be launched with a tow. Once at full
height (towing can launch pilots up to 3000 feet altitude), the pilot pulls a
release cord, and the towline falls away. This requires separate training, as
flying on a winch has quite different characteristics from free flying. There
are two major ways to tow: pay-in and pay-out towing. Pay-in towing involves a
stationary winch that winds in the towline and thereby pulls the pilot in the
air. The distance between winch and pilot at the start is around 500 metres or
more. Pay-out towing involves a moving object, like a car or a boat, that pays
out line slower than the speed of the object, thereby pulling the pilot up in
the air. In both cases, it is very important to have a gauge indicating line
tension to avoid pulling the pilot out of the air. Another form of towing is
"static line" towing. This involves a moving object, like a car or a
boat, attached to a paraglider or hang glider with a fixed-length line.
普陀区正规滑翔伞哪家强, 滑翔伞是一批热爱跳伞、滑翔翼的飞行人员发明的一种飞行运动,目前在欧美和日本等国非常流行,在中国台湾也掀起了一股旋风。滑翔伞与传统的降落伞不同,它是一种飞行器。很久以前,人类为寻找一双翅膀作过无数次的思考和探索。在古老的中国大地上,留下了像“驾车遨游太空”、“嫦娥奔月”等许多关于人类尝试飞行的美好传说。当今,滑翔伞的诞生,为人类插上了飞翔的翅膀。人们自由地翱翔于天空,享受着“脱离”地球引力的宁静与美妙.滑翔伞起源于20世纪70年代初的欧洲,当时,一些登山者从山上乘降落伞滑翔而**验到了一种美好的感觉和乐趣,从而创立了一个新兴的航空体育项目。**初的滑翔伞是借鉴于飞机跳伞使用的翼型方伞,它主要以下降为主,下降速度快,安全性能好。通过二十多年的发展和演变。现在的滑翔伞**长飞行17小时,**远飞行距离超过300公里,它体现了一种人与自然的交流,备受崇尚自然者的喜爱。
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