because we is too heavy. and muscles too small for our weight

http://cr4.globalspec.com/search/sitesearch?do=show&sort=textmatchrank&srch=human%20powered%20flight&order=asc

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  how much enegy would it take to fly

is this energy not sufficient for someone to make a lift into air (let it be for few seconds only, with the help of an apparatus, weighing, let's say, 10 kg) ?)

Yes

absolutely. We can climb stairs, we have the power. The problem is the low efficiency of air thrust, which requires a different methodology to give us the traction vertically.

found it

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I am rather sure that hang gliders only need a little human effort to keep them up in the air. The rest is just reading nature and aplying some physics to it.

SHHH! Don't tell Dick Rutan it is impossible, he built one that was pedaled across the English Channel....

http://www.youtube.com/watch?v=sp7yv67B5Sc

http://en.wikipedia.org/wiki/Human-powered_aircraft

Oh sure... and you probably believe they put a man on the moon too. "Human powered flight" and the "lunar landing" were both hoaxes designed to test gullibility and soften up brains in preparation for the future time when a cup of coffee would cost not a dime but $4.00.

Burt Rutan (and Dick) have designed and built some very interesting aircraft, but a human-powered one is not among them. Perhaps you were thinking of Paul MacCready.

not that i care either way about the moon landings

but

Lunar Laser Ranging experiment

From Wikipedia, the free encyclopedia Jump to: navigation, search The Lunar Laser Ranging Experiment from the Apollo 11 mission

The ongoing Lunar Laser Ranging Experiment measures the distance between the Earth and the Moon using laser ranging. Lasers on Earth are aimed at retroreflectors previously planted on the Moon and the time delay for the reflected light to return is determined. Because the speed of light is known with very high accuracy, the distance to the Moon can be calculated using this simple equation:

Distance = (Speed of light x Time taken for light to reflect) / 2

The distance has been measured with increasing accuracy for more than 35 years. The distance continually changes for a number of reasons, but averages about 384,467 kilometers (238,897 miles). The time delay in the reflected light is about 2½ seconds.

The first successful tests were carried out in 1962 when a team from the Massachusetts Institute of Technology succeeded in observing reflected laser pulses using a laser with a millisecond pulse length. Similar measurements were obtained later the same year by a Soviet team at the Crimean Astrophysical Observatory using a Q-switched ruby laser.^[1] Greater accuracy was achieved following the installation of a retroreflector array on July 21, 1969, by the crew of Apollo 11, while two more retroreflector arrays left by the Apollo 14 and Apollo 15 missions have also contributed to the experiment.

The unmanned Soviet Lunokhod 1 and Lunokhod 2 rovers carried smaller arrays. Reflected signals were initially received from Lunokhod 1, but no return signals were detected after 1971 until a team from University of California rediscovered the array in April 2010 using images from NASA's Lunar Reconnaissance Orbiter.^[2] Lunokhod 2's array continues to return signals to Earth.^[3] The Lunokhod arrays suffer from decreased performance in direct sunlight, a factor which was considered in the reflectors placed during the Apollo missions.^[4]

Apollo 15 LRRR

The Apollo 15 array is three times the size of the arrays left by the two earlier Apollo missions. Its size made it the target of three-quarters of the sample measurements taken in the first 25 years of the experiment. Improvements in technology since then have resulted in greater use of the smaller arrays, by sites such as the Côte d'Azur Observatory in Grasse, France, and the Apache Point Observatory in New Mexico. The first measurements were made by the McDonald Observatory in Texas, although lunar laser ranging at this site stopped in 2009.^[5]

At the Moon's surface, the beam is only about 6.5 kilometers (four miles) wide^[6] and scientists liken the task of aiming the beam to using a rifle to hit a moving dime 3 kilometers (two miles) away. The reflected light is too weak to be seen with the human eye: out of 10¹⁷ photons aimed at the reflector, only one will be received back on Earth every few seconds, even under good conditions (they can be identified as originating from the laser because the laser is highly monochromatic). This is one of the most precise distance measurements ever made, and is equivalent in accuracy to determining the distance between Los Angeles and New York to one hundredth of an inch.^[4][7] As of 2002 work is progressing on increasing the accuracy of the Earth-Moon measurements to near millimeter accuracy, though the performance of the reflectors continues to degrade with age.^[4]

Some of the findings of this long-term experiment are:

• The Moon is spiraling away from Earth at a rate of 38 mm per year.^[6]
• The Moon probably has a liquid core of about 20% of the Moon's radius.^[3]
• The universal force of gravity is very stable. The experiments have put an upper limit on the change in Newton's gravitational constant G of less than 1 part in 10¹¹ since 1969.^[3]
• The likelihood of any "Nordtvedt effect" (a composition-dependent differential acceleration of the Moon and Earth towards the Sun) has been ruled out to high precision,^[8][9] strongly supporting the validity of the Strong Equivalence Principle.

• Einstein's theory of gravity (the general theory of relativity) predicts the Moon's orbit to within the accuracy of the laser ranging measurements.^[3]

The presence of reflectors on the Moon has been used to rebut claims that the Apollo landings were faked. For example, the APOLLO Collaboration photon pulse return graph, shown here, has a pattern consistent with a retroreflector array near a known landing site.

Apollo 14 Lunar Ranging Retro Reflector (LRRR)	APOLLO Collaboration photon pulse return times	Lunokhod 1 – the small structure on the left is the retroreflector.
Lunar Laser Ranging ground station in Wetzell, Bavaria, Germany

[edit] See also

• Lunar distance (astronomy)
• LIDAR
• Carroll Alley (principal investigator of Apollo's reflector experiment)
• Lunokhod programme
• Apache Point Observatory Lunar Laser-ranging Operation
• Apollo Lunar Surface Experiments Package
• Third-party evidence for Apollo Moon landings

I assume you are posting this to show how, even before the days of Photoshop, airbrushed pictures could help to convince people that things happened that never did. These photos were produced by Starbucks to illustrate that silly ideas (like their idea that people will give up their first born for coffee) can be sold to the population at large.

Amazingly, there are still people who "believe" that the earth is round, because they have been told that it is. (This hoax was perpetrated by McDonald's. In their early test marketing, nay sayers in the company said: "Yuck, these things are awful. People will no more believe that these burgers are edible than they would believe that the world is round." Ray Kroc replied: "OK... I'll show you! I bet I can convince people that the world is round!" The rest is history. )

The earth is obviously flat, as you can see by looking out your window. If it were round, all the ocean's water wold fall off the bottom.

You're right, it was Macready, it WAS quite a while ago.... I was a kid at the time. I stand corrected.

Please, no, no, no. Tell me it isn't so!!!! 12 years of my life were not reality!!??!!

Hooker <--- NASA alumni 1966 to 1978

it isn't so.

feel better now?

I will when kramarat hands me that beer...

Hooker

Sad but true. Your "office" was a hologram. Your "boss" was an inflatable doll.

Yuri B is right... human-powered flight not possible, despite the ample "evidence" that is has been accomplished many times, and for rather long distances.

I have uncovered this fact as well: the US president from 1981 - 1989 was an just an actor.

Damn, no wonder Civil Service pay was so bad back then. It was virtual work.

Hooker

PS - I hate to burst your bubble but in my lifetime most all US presidents have been actors, and primadonna's at that.

Gossamer Albatross , check Wikipedia for the story. Yes, McReady and friends. 2 hours and 49 minutes to cross the English Channel.

Cool video, But....... Where do you store the beer cart?

like what is the point of being able to fly if you can't take your beer with you? sounds a bit redneck don't you think?

I am a bit of a redneck, lynch told me so, so it it must be true.

Actually, beer is fairly high on my personal food pyramid and I'm not taking any self powered flights without it, period!

I even have a beer with me when I'm pole vaulting in the yard on the weekends.

You're supposed to hand your beer to me when you say, "Hey, watch this!"

Hooker <--- who gets a lot of free beer that way.

Yeah, but you only get to hold my beer when I'm airborn, I'm gonna be thirsty when I land!

Only if you are still conscious....

Good point....I'd better stay in my chair on the porch.

it seems to attribute that to one "Paul McReady"?? Was Rutan part of the team?

He is attributed to the Voyager. can you clarify?

Chris

Yeah, I misremembered... but dang if I still don't connect him to that in my head, I wonder if maybe he was part of the team and that is the bit that is confusing me. I'm going to have to do a bit of research now before it drives me bonkers (ok, more than normal.)

First of all, you gots to get a lots smaller, mebbe 20 kilos.

Then youse needs some hollow bones.

Now, some big skin flaps would be nice. 'Member your uncle Morty, the weird one that had two fingers stuck together? Well, inbreed him for a coupla hundred generations.

And replace about 90% of our muscle mass with tendons in order to have the endurance to sustain explosive power.

In my studies of using a bicycle mechanism for generating power, I have discovered that "In lab experiments an average "in-shape" cyclist can produce about 3 watts/kg for more than an hour (e.g., around 200 watts for a 70 kg rider), with top amateurs producing 5 watts/kg and elite athletes achieving 6 watts/kg for similar lengths of time. Elite track sprint cyclists are able to attain an instantaneous maximum output of around 2,000 watts, or in excess of 25 watts/kg; elite road cyclists may produce 1,600 to 1,700 watts as an instantaneous maximum in their burst to the finish line at the end of a five-hour long road race." Walking on a treadmill can produce about 240 Watts continuously.

If one has a good aerodynamic wing (typical hang glider or parasail), and a high enough launch point, and good updrafts, this should be more than adequate to keep one airborne and even provide sufficient excess energy for a bit of maneuvering, should one so desire...

It is getting off the ground that is the real issue...

Of course we can fly... briefly... it is the falling that is the problem. Stop falling and you've got it made.

I think it's that sudden deceleration when you stop falling (i.e. hitting the ground) that causes most of the problems.

This is true.. back in 1985... my brothers and I went to visit my parents on Texada Island (above vancouver) and there was an old quarry there, with a perfect 80 foot cliff into the water.. we all jumped...

You get a sudden deceleration when you hit the water at that speed too!

^{_{(ps. speedo bathing suits don't work as parachutes)}}

That explains a lot.....=b

It's quite easy to fly really; just hold on tight to a large flat sheet in
a good wind - and try to stay on the ground! I am surprised many have
not already explored / developed this "opportunity" and, for controls,
with pocket computers today, it should be relatively easy?
(also losing a few pounds in weight would help.)

jt.

http://www.bing.com/search?q=birdman+of+Bognor&form=QBRE&filt=all&qs=n&sk=&adlt=strict

Human powered flight is possible and I'm talking about taking-off, controlled flight and turns and landing safely. This was kind of a fad maybe 20 years ago with first a completion kind of like the x-prize with a significant monetary award to take-off, fly a particular figure-8 course and land. After that prize was won there was another to fly the English Channel which was won a few years later.

Now, does human flight have any practical applications? If everyone was like Lance Armstrong or Alberto Contador, but sadly - No

Another way to experience true birdlike flight: may be to fill an enclosed arena with a very dense gas like sulphur hexafluoride (it's about 6 times the density of air). Of course you'd need to mix in some oxygen. I guess you could double the pressure without causing decompression sickness when leaving. It's not harmful to breath: people often do the opposite trick to breathing helium with it.

I accept no responsibility for any medical problems which arise from trying this.

I remember well a guy who built a machine like a bycicle and try cross from England to France.He got exhausted and quit...But the machine worked perfectly and however in a long distance.-

It may be not so much as to overcome the force of gravity as it is to, shall I say, turn off the gravity source? Or perhaps part the gravity in such a was as to move through and avoid its effects. How about "Inverted Universal Globe Spin Theory"?

Is it a coicidence that the many reports of UFO sightings are of disc shaped "spinning" vessels?

here's a link. I've read a tiny bit of it.

Chris

I'm wandering why birds can fly even their wings might be less powered to lift thier body.

You may not believe, but it is true:

I am blessed with the very good sleep. I rarely experience any dream. But whenever I see some dream, it is... I am flying, just by moving my hands like wings movement of birds.

This is the only dream I see.

(once again let me tell...I am not kidding)

If you truly are seeking the exact value to two or three significant figures (as the values you have given) you need to define more precisely your question, since people are flying with the aid of light apparati now. A hint as to how they are is included in the comment that "2.64 kW ( for a few seconds although)" as a value for energy has no significant figures. How interested are you? You should also define "make a lift into air" since most humans are already "in air" by a common definition. If you think this is nit-picking, that is why you do not have a number. Good luck! (ps- I was flying last night in a dream-as many other nights- so I am smitten with this subject)

People are becoming stronger , who strive for it (world sport records seems to keep being renewed), appear new materials, new designs (such as in aerodinamics) - technologies improve immensely. With the considerations like these I wanted to know whether smb did it ? (and I did not mean smb exactly flapping just sort of artificial wings, no, an apparatus which use all the power the flier can produce, all his muscles working for a short while, to take him(self) off from the ground ? Never possible? In practice, which ratio power/weight still must be needed ?)

Thank you, and, the nice word - "aware" - I should have heard, saw somewhere in the news, but did not remember the fact that flights on human-powered air crafts had been done, so it was.

When I first saw an eagle take flight, I was impressed by the method that this bird used. It was perched on branch of a dead tree on the top of a hill, clearly visible. It spread its wings, leaned forward, and dove downward. The path of its flight was a graceful arc, rising with only small wing motions back up to it's previous height. There are ski areas which in the summer (USA) have no snow, so they take hang-gliders up the ski slopes to the top of a hill so that the fliers can jump off the top of the hill without hitting trees on the cleared ski slopes. If you are smart enough and brave enough to copy an eagle you can soar all day. Is this not flying? Note that some people climb the hills without a lift. It just takes them longer. Humans are a lot heavier than eagles, but presumably a lot smarter.