Hunt’s resume doesn’t make him intelligent.

Toyota, if you have been following their ads, is touting the idea that amusement parks can be self-sustaining from a conservation of energy standpoint. They base this on the idea that energy can be reclaimed as a roller coaster descends similar to the reclaiming of energy while a vehicle is brought to a standstill. As with the vehicle the roller coaster’s velocity would have to diminish as energy was extracted. The riders would not appreciate this. The roller coaster would also not ascend the next rise near as far as would have had the energy not been extracted. The energy removed plus additional energy would have to be added to propel the coaster to the additional distance that it would have before the original energy extraction.

In summation, even a multimillion dollar corporation can espouse misconceptions, let alone one individual.

Let me make this CRYSTAL CLEAR This is not a closed system therefore not a perpetual motion machine!!!!!
Cars continue to go as long as you put fuel in them, until they run out of fuel, or break down mechanically. This plane could get enough energy to fly like a wave up and down averaging roughly 400 miles per hour horisontal velocity in a number of different ways.
First picture the plane in a body of water like in the video, wind will power the turbines giving mechanical power which can be turned into electricity using tesla coils, in addition solar panels could be used to provide extra power to run the cockpit and flight control systems. This electricity could then be used to compress air for the pnuematic motors. Now from here there are a couple different ways to do it. You could use a straight vacuum (vacuums have greater lifter power than even the lightest gas, which is hydrogen in case you don’t know), the key here would be to have some type of material which could withstand the pressure of the vacuum and also be able to be built very large to gain the greatest volume, and therefore lifting power. The way Hunt proposed it helium balloons would be used as a redundant safety measure.
Here’s hunt’s resume this guy is not some crackpot, the military is actually interested in his idea as a UAV Mothership ROBERT D. HUNT – Theoretical Physicist / Inventor / Founder

After attending Mississippi State colleges, Robert Hunt began his career in 1969 as a New Nuclear designer for Newport News Shipbuilding, then a division of Tenneco Oil Company, where he designed nuclear reactor components for the U.S.S. Nimitz Aircraft Carrier. Mr. Hunt became a private inventor during the mid-1980s while involved in the field of aquaculture. He invented and patented a cryogenic liquid oxygenation system for the aquaculture industry. He has since dedicated his time to the development of his proprietary alternative, clean-energy generating technologies. Mr. Hunt holds numerous patents including a thermoelectric generator that generates electricity from the thermal energy within the air, a new high pressure Drum Jet Turbine that among other uses is capable of being mounted onto a high pressure natural gas well to generate substantial power from the kinetic energy via the earth’s geo-pressure, without burning any of the natural gas. Mr. Hunt has also invented a modified Einstein Refrigeration Cycle and a revolutionary new design vertical axis wind turbine. Many of Mr. Hunt’s patents are licensed to Encore Clean Energy, a public company trading under the ticker symbol ECLN.

Mr. Hunt is a member of the American Institute of Aeronautics and Astronautics (AIAA), a member of the National Business American Association, a member of the National Hydrogen Association, and he served as the first Mississippi Chairman of the Gulf of Mexico Program.
Anyway honestly some people on this board didn’t seem to understand that the acceleration of gravity and aerodynamic lift would provide propulsion in the same way that it does on a glider, the pnuematic motors have nothing to do with propulsion other than the fact that they would create the aerostatic lift by creating a vacuum in a large volume. In order to make it safer Mr. Hunt is suggesting that helium be used as a backup. The helium is actually a rendundant safety measure. The way he seems to be planning to do it also to take advantage of temperature differentials using a proprietary chemical.
To those who think this is a perpetual motion machine you are wrong because it could input energy via mechanical energy of wind using an ingeniously designed vertical axis wind turbine, the photoelectric effect using some type of silicon hybrid material to achieve current, and heat by utilizing the temperature of the air intake which affects lift obviously you should know that hot air rises! Ever seen a hot air Ballooon? As long as you keep inputing energy from some source, ie fire, solar and wind the balloon keeps flying. I bet someone could go around the world in a balloon, in fact I think a few people have, but that doesn’t make it a perpetual motion machine because it’s not a closed system, there is an input of energy.
For those of you who think this idea is unrealistic, I’d like to point out that this idea is not a novel one, in fact many creatures on earth use buoyancy and gravitational acceleration to travel, whales and dolphins being among the most well known. For years scientists were baffled as to how dolphins could travel such vast distances because the maximum amount of kinetic energy they could possibly obtain from their caloric intake by using their muscles to swim was not nearly enough to account for the thousands of miles they traveled. Some speculated that they had some sort of “super slippery skin” but it turns out that was wrong. In reality dolphins have air pocket inside their bodies that they intake air into when they breath in and then they compress it using their muscles thereby decreasing the density differential thus reducing the hydrostatic lift and causing them to fall towards the earth in the water (the fall is obviously assisted by their diving muscles powered by calories and their hydrodynamically designed bodies) when they get to the bottom of their dive they use their muscles again this time decompressing the air giving them positive bouyancy and they swim upward at an angle assisted by hydrostatic lift.
The glider/airship as I call it is the same concept in a different medium. Basically one would use aerostatic lift provided by the pnuematic motors and helium for a dditional safety, the compressed air having been creating using a combination of wind, solar, and heat energy. The ship would rise because of the lift provide by the density differential of either a vaccuum, helium, hot air, some proprietary chemical, or a combination of all four. Once the weight of the vehicle equals the lifting force of bouyancy the pnuematic motors would pump cold air from the atmosphere which would displace and cool the helium causing the ship to lose positive buoyancy. At this point gravitationaly accelaration would force the vehicle straight down, this vertical force vector can be transformed into a horizontal vector because of the aerodynamic design of the aircraft much like a glider would function except for the fact that the curve downward would be steeper to achieve greater speed. As it is falling it could take advantage of some of the gravitational energy downwards using the vertical axis wind turbines. This energy, and that obtained from temperature differentials and/or solar panel, would then be used to create the aerostatic lift again via compressed air motors, thus repeating the cycle (sort of the same way that a car powers the spark plugs with power from the alternator which is created from the pumping pistons, in this case the initial store of compressed air gained from wind and solar energy while sitting in a body of water would be akin to the battery in a car which gets the process started). Additional energy could be obtained by taking advantage of temperature differentials in much the same way that the weather works. I would also think that it would be wise to utilize solar energy, both the photoelectric effect and the straight heat. I think you could probably also make one that utilizes the lift of hot air on the way up somehow while mainting aerodynamic shape. The thermodynamic numbers that Hunt published in the AIAA show that this is clearly not a perpetual motion machine, it’s more like a flying power plant. It’s parts will decay over time it will not run perpetually and something could happen to the fuel source i.e. the temperature of the air, the sun, and the wind. This is not a fuelless vehicle, it get’s fuel from it’s sourroundings all of which basically comes from the sun if you consider that the sun is the ultimate source of wind energy. Basically it’s a solar powered glider/airship, it could be solar powered in three ways, by using wind, the photelectric effect, and the heat from the sun. It is no more a perpetual motion machine that a hydroelectric turbine that continuously churns out electricity transformed from gravitational potential, it is in a position to gather energy from the sun in three different ways, and by utilizing shape to reduce friction and provide aerodynamic lift it can achieve speeds of roughly 400 miles per hour horizontally and potentially travel around the world even multiple times if well built.
Anyways some people on here are confused so I thought I’d clear the air. Don’t get me wrong this thing would be very difficult to build paticularly the flight control system, but I have thought it through and the theory is sound. I’m pretty sure the American Institute of Astronautics and Aeronautics wouldn’t publish his paper thermodynamic detailing the thermodynamic equations if they didn’t add up. Anyway food for thought I predict that within fifty years you’ll see these things flying around, I plan on having one even if I have to build it myself. Good thing I’m a mechanical engineer and all my friends are chemical, mechanical, and electrical engineers we just might able to get it done, after all he cant patent the idea of a glider/airship he can only patent his machine and process, and patents don’t last forever anyway.
To those of you who ignorantly posted without the slightest idea what your are talking about I must say that you have clearly illustrated the abhorrent level of scientific ignorance and arrogance amongst the general public today; in the future don’t go spouting your mouth off about perpetual motion machines if you don’t even know what they are.”[/quote]

“…can be turned into electricity using tesla coils…” Tesla coils “transform” electricity from one format to another. They do NOT transform mechanical energy into electrical energy!

The “gravity assist” flyby technique can add or subtract momentum to increase or decrease the energy of a spacecraft’s orbit. Generally it has been used in solar orbit, to increase a spacecraft’s speed and propel it outward in the solar system, much farther away from the Sun than its launch vehicle would have been capable of doing.
http://saturn.jpl.nasa.gov/mission/gravity-assist-primer.cfm“[/quote]

You had better revisit Kepler’s laws of conservation of momentum!! Momentum is not created or subtracted in planetary motion or in this case satellite motion. Also revisit “gravitational assist”. You have not understood the concept!