How did  the "SPRUCE GOOSE" manage to fly over 1 nm but was unable to climb higher than its wing span?
99997
Increased lift at low altitude due to ground effect, yah? \n\nI'm curious.  You apparently know the answer, so why ask the question?
884352
Interesting question. See, in order to achieve lift, an airfoil (or bird's wing in this case) must deflect air down in order to achieve an upwards lift. This is a consequence of Newton's 3rd Law ("For every action, there is an equal and opposite reaction").\n\nNote that this DOES NOT imply that the downwardly-deflected air reacts against the truck bed. This is a common misconception; note that rockets have no trouble zipping around space, even though their exhaust has nothing to react against. \n\nOne caveat though: naturally, if the airfoil or wing passes close enough to the truck bed, the deflected air will push against it, causing a small force, like when you feel the breeze coming off of a ceiling fan. However this is simply a consequence of the proximity of the objects rather than a physical interaction between them.\n\nSo in answer to your question, yes. If every canary were to take flight at the exact same instant, and the truck is tall enough that the air deflected from their wings does not reach the floor, then the truck will measure its "canary-free" weight on the scale:\n\nW = (M - m)*g\n\nW = 19,900 lbs\n\n-----\nBONUS POINT\n-----\n\nFish are different from birds in that, for a bird to move in 3-dimensions, it has to deflect air (as discussed above). A fish, however, does not. The fish maintains its position using Archimedes Principal; that is, by absorbing and expelling water or expanding and contracting its rib cage, it can alter its "altitude" in the water, just like a submarine.\n\nThe bird remains in the air by constantly deflecting it down; a fish remains above the bottom of the tank by actually resting on the water. In this sense, the weight of the fish is transferred through te fluid as though the fish were part of the tank itself (regardless of the fish's position therein).\n\nThus: canaries flying inside the truck - the truck measures it's empty weight; fish swimming inside the truck, the truck will measure its loaded weight.\n\n\nHope that helps! :)
635045
Bumblebees can fly. On an average, a bumblebee travels at a rate of 3 meters per second, beating its wings 130 times per second.\n\nHow did this business of proving that a bumblebee can't fly originate? Who started the story?\n\nOne set of accounts suggests that the story first surfaced in Germany in the 1930s. One evening at dinner, a prominent aerodynamicist happened to be talking to a biologist, who asked about the flight of bees. To answer the biologist's query, the engineer did a quick "back-of-the-napkin" calculation.\n\nTo keep things simple, he assumed a rigid, smooth wing, estimated the bee's weight and wing area, and calculated the lift generated by the wing. Not surprisingly, there was insufficient lift. That was about all he could do at a dinner party. The detailed calculations had to wait. To the biologist, however, the aerodynamicist's initial failure was sufficient evidence of the superiority of nature to mere engineering. \n\nWhatever its origins, the story has had remarkable staying power, and the myth persists that science says a bumblebee can't fly. Indeed, this myth has taken on a new life of its own as a piece of "urban folklore" on the Internet.\n\nIn some sense, the story has done its share to inspire further research. In recent years, scientists have tackled the problem of insect flight from a number of different angles and gained new insights into the complexities of powered flight. \n\nIt's quite possible, for instance, to calculate correctly the area of a rectangular piece of property just by multiplying the length times the width. Yet you can still get the "wrong answer" from a practical point of view, maybe because the measurements of the length and width were inaccurate or there was some ambiguity about the plot's boundaries or shape.\n\nSo, no one "proved" that a bumblebee can't fly. What was shown was that a certain simple mathematical model wasn't adequate or appropriate for describing the flight of a bumblebee.\n\nInsect flight and wing movements can be quite complicated. Wings aren't rigid. They bend and twist. Stroke angles change. New, improved models take that into account.
654453
The effective weight of the pine needles, and therefore the branches would be increased.  Happens a lot in New England.  With enough weight, the branches fail to hold the weight , and break. Snow on branches also increases the profile of the tree , and high winds are more likely to blow it over.\nAre you going to get an A for my answer?
684200
i didnt know chickens could fly.
294601
Simply put, faster air moving over the top of the wing creates a lower pressure than the slower air under the wing.  This creates lift and causes the wing and the plane to rise.\n\nThe shape of an aircraft wing is curved on the top and flat on the bottom, the air has to move further on the top of the wing in the same time, so it moves faster creating lower pressure. \n\n(This is Bernoullis principle, higher speed = lower pressure, lower speed = higher pressure).  \n\nThe plane is propelled by a jet engine or propellor fast enough until lift is achieved.
862952
Actually, this was surpassed by Ryan Capes at a distance of 310' 4". You can see video of this here: \nhttp://www.nbc4.tv/news/5216306/detail.html
1072715
large altitude doesn't nesaserily mean that the projectile will spen more time in the air. \nif something is thrown off of a cliff, there is a high altitude but the projectile will just go down. \nif you were at the bottom of the same cliff and threw something up with enough force so that the max hieght is the same as the cliff, this projectile will spend double the time in the air as the first projectile.
500715
I just made it yesterday out of paper and you can't believe it can fly for more than a second... and also you can make living beings sit in it ... ants//// \n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\nI am sorry I don't know the answer to your question. :(
439960
According to the Bernelli principle it is because the ratio of high-speed wing over the TOP of the foil of the wing is not sufficient to generate lift.  Therefore gravity takes over and it falls back to earth.
481337
i beleive according to the man in the castle a swallow had to beat it's wings 43 times every second in order to maintain air speed velocity. That's a european swallow by the way :
193979
Airplane wings use a combination of Bernoulli's principle (the faster air flows over a surface the lower its pressure) and "Reaction" or Newtonian lift, the force produced by the downward acceleration of an air mass by a plane surface that is tilted with respect to the velocity. (See 1st & 2nd references). The upper surface of the wing is curved and the lower surface is relatively straight. Thus air passing over the wing has farther to travel before it rejoins the air that went under the wing, and must move faster. The lower pressure over the wing creates a Bernoulli lift force. The wing also has a positive "angle of attack" (basically the tilt angle of the wing's lower surface) producing Newtonian lift. Ref. 1 estimates that airliners have more Newtonian than Bernoullian lift. The wing transfers the sum of these lift forces to the airplane. And of course the thrust needed to reach the speed necessary for the wings to provide adequate lift comes from a motor-driven propellor or a jet engine. \nBirds, having movable wings, fly in two basic modes, gliding and flapping. These modes also use a mix of Bernoulli's principle and Newtonian momentum exchange to achieve lift. When gliding, the curved wing surface operates similarly to that of an airplane. More momentum exchange occurs when the wings are flapped; each downstroke pushes air downward and backward which provides an upward and forward force to the wing and through the wing to the bird's body. Feathers play a vital and mechanically complex role in flight, especially in flapping. The 3rd reference discusses this in some detail. I can't put pictures in this answer but the 4th reference provides a diagram of gliding lift, and you can find much more by googling "aerodynamic lift birds".
284704
a bird can not fly to great heights with out wind. when someone reaches a high level of achievement then the person or persons who have aided them in this accomplishment are said to be "the wind beneath my (the achievers) wings"
670367
Unidentified flying object.
1010065
The  gosling must be able to fly for a long distince and have had contact before you can just put them with the flock  they must have had a bond at some point . I would not turn them loose I sugesst getting a hand puppet that looks like the older geese and feed them that way , so the only see the puppet I would let them go when they are around 6 mo- 1yr that way the are mature enough to find food and defend them selves
458324
Bald eagles can build their nests in trees or sometimes right on the ground. A nest can weigh 2,000 pounds over many years as new materials are constantly added to the nest to solidify its structure and can actually fall out of the tree. These beautiful birds frequent locations that are very high above sea level. In some cases they are 7,000 feet above sea level but might onle be 40 or 50 feet off the ground in a tree.
363865
As the car moves along, air passes over the top of the roof, creating an area of low pressure.  The air pressure inside the car, having a higher pressure than outside, then forces the canvas upward.\n\nThe principle is similar to that of an airplane wing.  Of course though, there isn't anywhere enough lift generated to make the car fly.