uncleflo
Registered since September 28th, 2017
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Bird Flight
Saved by uncleflo on April 17th, 2021.
Exactly how birds acquired the ability to fly has baffled scientists for years. Archaeopteryx provided a starting point for speculation. Built like a dinosaur, but with wings, scientists guessed at how a hypothetical ancestor might have taken flight. Some scientists support the arboreal hypothesis (e.g., Feduccia 1996) and suggest that the ancestors of Archaeopteryx lived in trees and glided into flapping flight (Figure to the right). But others argue that the claws of Archaeopteryx weren't suited to climbing. So, others support the cursorial hypothesis (e.g., Burgers and Chiappe 1999) and suggest that these ancestors used their long, powerful legs to run fast with their arms outstretched, and were at some point lifted up by air currents and carried into flapping flight.
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The SR-71 Pratt & Whitney JT11D-20B J58 Engine
Saved by uncleflo on June 20th, 2014.
The SR-71 Blackbird is powered by two Pratt & Whitney J-58 turbo-ramjets, each developing 32,500 pounds of thrust with afterburning. The critical problems concerning supersonic flight with air breathing engines are concentrated in the air inlet area. The circular air intakes of the SR-71 contain a center body tipped with a conical spike. The spike is movable, forward for takeoff and climb to 30,000 feet after which, as speed builds up, it moves rearward, controlling the amount of air entering the engine. As it does so, Air Inlet Bypass Doors in the side of the nacelle close to establish the correct flow of air through the engine, holding the supersonic shock wave in it's critical position within the inlet. The engine itself operates at subsonic speed.
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F-15 Streak Eagle Record Flights Part 1 - YouTube
Saved by uncleflo on June 3rd, 2014.
The Streak Eagle attempts to break numerous world air records. Even if you don't like airplanes, just play it for the music. You'll notice that the Streak Eagle isn't painted, that's to reduce overall weight and make it go faster. You'll also notice that before take off, it is chained to the runway and then released. This is to build up as much potential energy as possible before the plane takes off.
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Seven Summits Guided Climb and Expedition - Mount Everest - Mountain Madness
Saved by uncleflo on July 23rd, 2013.
All climbers are required to have past high-altitude mountaineering experience. In addition, members should be able to ascend and descend fixed lines independently and be proficient with cramponing on steep ice/snow slopes. For an increased chance of success, members should also be in good physical condition. Our “Live Your Dreams” training program can help you gain any additional training or experience needed.
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Youth Hostels Luxembourg - Echternach - EN
Saved by uncleflo on December 25th, 2012.
The youth hostel has a dining room, a cafeteria with terrace, two conference rooms overlooking the lake, two meeting rooms and two common rooms. It is located near the Echternach lake and provides an equipped sports hall and a 14 m high indoor climbing wall. 118 beds are divided in rooms from 2 to 6 beds, all equipped with sanitary facilities.
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