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Powerless Aircrafts and Unassisted Human Flight


Bill Li

on 11 February 2013

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Transcript of Powerless Aircrafts and Unassisted Human Flight

Unpowered Aircraft and Unassisted Human Flight An Inquiry.
By Bill
Aydan. What is unpowered flight? What are some advantages? What are some forms of unpowered flight? Gliders Unpowered flight is flying without using any power source, or unassisted by any other third party, like electricity or oil. Some advantages of unpowered flight are that unpowered flight doesn't pollute and it's cheaper. Most use air to get themselves to fly. Hangliders and Wingsuits Unassisted human flight; how close are we? There are many ways to classify forms of unpowered flight. The catergories are: Lighter than air - Sustained flight, buoyed by a density less than air with no forward motion required ( balloons)
Falling - Sustained free flight due to slow rate of descent compared to upward air-speed ( no aircraft use falling)
Parachuting - Vertical descent slowed by high air resistance, though possibly with a minor horizontal motion (or sometimes defined as flight at an glide angle greater than 45 deg.) i.e parachutes
Gliding - Forward flight with smooth airflow (or sometimes defined as flight with a glide angle less than 45 deg), i.e gliders
Soaring - Sustained free gliding flight, drawing energy from rising air ( sailplanes)
Kiting - Tethered flight using an angled plane to create an upward force from the wind. (kites and rotor kites) Animals that use unpowered flight Gliders are unpowered aircraft that use Bernoulli's Principle
in order to produce lift from passing air. Since these vehicles are very light, aerodynamic and only contain the pilot, gliders can be able to fly without the help of an engine. Gliders are usually created with very lightweight yet sturdy materials, such as fibreglass and aluminium. Unfortunately, there has recently not have been large amounts of research and production
behind these. - no power source
-unassisted by third party source
-ecofriendly; uses air to fly

Lighter than air





Kiting Ex. Balloons

No aircraft use this

Ex. Parachutes

Ex. Gliders

Ex. Sailplanes

Ex.Kites -relies on Bernoulli's Principle to produce lift from passing air
-light; can easily fly without an engine There are many animal and plants that use unpowered flight. For example, small insects, spores and orchid seeds use falling as their form of unpowered flight. There are many gliding animals, such as the flying squirrel, as well as many other mammals, the flying dragon lizard and flying fish. There are many kinds of gliding lizards that glide to capture food or escape from predators. Some designs for unpowered aircraft are even based on these animals. - Otto Lilienthal(1880) - extremely light/aerodynamic - nylon, A-shape Although unassisted human flight has not been achieved yet, there have been prototypes for human powered aircraft (HPA's). These aircraft require no power other than the power of our bodies. The Royal Aeronautical Society has offered a 50,000 pound prize to the designer of a HPA that could fly a figure-8 course. This was achieved by Paul MacCready with the Gossamer Condor (shown here). -adds surface area to body -enables body to create lift -Rex G. Finney(1930) - gliding animals
- petaurus mammals
- flying snakes
- flying dragon lizards
- flying fish #YOLO Stop at backflips ^^
for *cough*
language *cough* We hoped you enjoyed the presentation! Disclaimer: We will be incorporating
some eye-relieving jot notes for the comfort
of the reader. The first hang glider ever to make an appearance was one built by Otto Lilienthal, one of the most important avation pioneers in history. This unpowered flight could support one or two people, being very light and aerodynamic. Like the gliders, they mostly depended on Bernoulli's Principle for lift and thrust. During World War II, hang gliders were made using simpler materials, like iron and cloth. Nowadays, they are made with nylon with a steel frame. Wingsuits add increased surface area to the body, allowing us to have lift and thrust from passing air. This is our first step into unassisted human flight. The suits were invented by Rex G. Finney in 1930. As with all suits that involve humans to plummet to the ground, it is accompanied by a parachute, that can add significant weight increase, meaning less lift. Not the most effective, but can be very fun nonetheless. Bibliography: http://adventure.howstuffworks.com/wingsuit-flying.htm
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