Benützer: benwl |
Conceptual Mars mission using 3 VASIMR engines This is NASA's conceptual human mission to Mars using 3 plasma rockets (VASIMR), 3 nuclear reactors (similar to the reactors used on nuclear submarines). The reactors are extended on booms in order to minimize the amount of shielding required to shield the spacecraft. The large fuel tanks would provide shielding astronauts against radiation from the Van Allen belts during the Earth departure phase and also against cosmic radiation once outside the influence of Earth's magnetic field. An electric propulsion thruster such as VASIMR would provide a faster travel time compared to using chemical rockets. The VASIMR engines would speed up the spacecraft towards Mars and then slow down the spacecraft once past the half way point from Earth to Mars. Ion engines in general provide a low amount of thrust (up to several Newtons or tens of Newtons), but do so for many hours or months. In this way, a spacecraft with a given mass can continually speed up and attain velocities much higher than with chemical rockets. A mission to Mars using plasma propulsion would also have an abort capability should something go wrong early on in the mission, chemical rockets do not provide for this contingency. Tags: Mars VASIMR Variable specific impulse magnetoplasma rocket iss space station human manned ion engine propulsion leo |
Benützer: RotaryICEman |
Scrapbook of Experimental Rotary Engines This is a follow-up to my previous Experimental Rotary ICEs video. It shows the family tree & close-ups of the prototypes that haven't been cannibalized for spare parts. The earliest sketches for some of these models date back to the early '80s. Work has been carried out since then whenever time & $ permits. Thousands of man-hours later & with the benefit of hindsight, many of these designs are admittedly naive. However, they were a necessary part of the learning process. The work continues & the current designs are more refined. The latest model produces 1/5 horsepower on the dynamometer & it does so without requiring any lubrication, or a cooling system. Performance should improve with the next generation seals. Some models have been dry run (no combustion) for months at a time without any problems. The wear properties of graphite-on-polished-steel are truly unbelievable! The advantages of being able to modulate the vane engagement (for ganging up & throttle control) is very noteworthy. Three new designs are currently on the drawing board. One uses a single rotor & 2 vanes to compress & burn the charge. In another version, the vanes pivot rather than slide. A third design uses graphite lined metal rotors & vanes. The purpose of this program is to develop more fuel efficient engines. These videos are intended to inspire & motivate interested parties into building their own prototypes for the benefit of all. -Dave Tags: rotary internal combustion engine alternative energy fuel hybrid efficient hydrogen gasoline biodiesel oil experimental |
Benützer: rashmew |
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Benützer: MI6MI5 |
Air Crash Investigation/Mayday: All Engines Failed Part 6 British Airways Flight 9 experiences views of St. Elmo's fire on the plane along with smoke smelling like sulphur in the cabin. Suddenly, all engines on the 747-236B start flaming. Then, they flame out. "This is Speedbird 9. All 4 engines have failed!" the pilot shouts on the radio. With 263 people in the balance, Flight 9 starts falling. Tags: Air Crash Investigation Mayday All Engines Failed |
Benützer: MI6MI5 |
Air Crash Investigation/Mayday: All Engines Failed Part 3 British Airways Flight 9 experiences views of St. Elmo's fire on the plane along with smoke smelling like sulphur in the cabin. Suddenly, all engines on the 747-236B start flaming. Then, they flame out. "This is Speedbird 9. All 4 engines have failed!" the pilot shouts on the radio. With 263 people in the balance, Flight 9 starts falling. Tags: Air Crash Investigation Mayday Falling from the Sky |
Benützer: SqueezeMyLemonBabe |
Boston-Cool the Engines A video I made to the song by the band Boston, "Cool the Engines", in memory of Brad Delp, the lead singer for Boston, who commited suicide at the age of 55. You will always be remembered Brad, rest in peace. Tags: boston cool the engines brad delp tom scholz sholz shultz shulz rock classic party dont look back peace of mind amanda |
Benützer: MI6MI5 |
Air Crash Investigation/Mayday: All Engines Failed Part 1 British Airways Flight 9 experiences views of St. Elmo's fire on the plane along with smoke smelling like sulphur in the cabin. Suddenly, all engines on the 747-236B start flaming. Then, they flame out. "This is Speedbird 9. All 4 engines have failed!" the pilot shouts on the radio. With 263 people in the balance, Flight 9 starts falling. Tags: Air Crash Investigation Mayday All Engines Failed |
Benützer: natgeoUK |
Air Crash Investigation - All Engines Failed World famous aviation expert David Learmount unravels the mystery and terror that struck a 747 jumbo jet when all four engines suddenly stopped at 37 thousand feet. Tags: National Geographic Channel air crash investigation investigated |
Benützer: pinakaguwaping |
Stars and Cars - Mercedes Benz High Performance Engines Mercedes Benz high performance road (AMG) and race (Formula 1) engines. Features race cars (including F1) and AMG cars (510hp R63 AMG). Tags: Mercedes Benz High Performance Engines |
Benützer: rob86879 |
Skydiving Wingsuit with Jet Engines This clip shows a man who attaches engines to his legs and then jumps out of a hot air balloon wearing a wingsuit. He manages to achieve 30 seconds of horizontal flight without loosing any altitude (allegedly) Tags: skydiving BASE jumping skateboarding extreme parachuting bungee free fall sex death |
Benützer: ministeamcom |
Mamod Steam Engines How Its Made http://www.ministeam.com The Great Toy Steam Company LLC Discovery Channel Mamod Steam Engines How Its Made Tags: Mamod Steam Engines How Its Made |
Benützer: MI6MI5 |
Air Crash Investigation/Mayday: All Engines Failed Part 2 British Airways Flight 9 experiences views of St. Elmo's fire on the plane along with smoke smelling like sulphur in the cabin. Suddenly, all engines on the 747-236B start flaming. Then, they flame out. "This is Speedbird 9. All 4 engines have failed!" the pilot shouts on the radio. With 263 people in the balance, Flight 9 starts falling. Tags: Air Crash Investigation Mayday All Engines Failed |
Benützer: MI6MI5 |
Air Crash Investigation/Mayday: All Engines Failed Part 4 British Airways Flight 9 experiences views of St. Elmo's fire on the plane along with smoke smelling like sulphur in the cabin. Suddenly, all engines on the 747-236B start flaming. Then, they flame out. "This is Speedbird 9. All 4 engines have failed!" the pilot shouts on the radio. With 263 people in the balance, Flight 9 starts falling. Tags: Air Crash Investigation Mayday All Engines Failed |
Benützer: ucberkeley |
SIMS 141 - Search, Google, and Life: Sergey Brin - Google Search Engines: Technology, Society, and Business. The World Wide Web brings much of the world's knowledge into the reach of nearly everyone with a computer and an internet connection. The availability of huge quantities of information at our fingertips is transforming government, business, and many other aspects of society. Topics include search advertising and auctions, search and privacy, search ranking, internationalization, anti-spam efforts, local search, peer-to-peer search, and search of blogs and online communities. The Instructor, Dr. Marti Hearst, is an associate professor in the School of Information at UC Berkeley, with an affiliate appointment in the Computer Science Division. The UC... Tags: google terrorstorm sergey brin Education sims 141 information systems webcast uc berkeley cal course cl |