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Steam Rocket
A steam rocket (also known as a hot water rocket) is a thermal rocket that uses water held in a pressure vessel at a high temperature, such that its saturated vapor pressure is significantly greater than ambient pressure. The water is allowed to escape as steam through a rocket nozzle to produce thrust. Steam rockets are usually pressure fed, but more complex designs using solar energy or nuclear energy have been proposed. They are probably best known for their use in rocket-powered cars and motorcycles, and they are the type used in aeolipile. Principle of operation Water, while under pressure, is heated up to a high temperature (approx. 250–500 °C). As the hot water goes through the nozzle (usually a de Laval nozzle) and the pressure reduces, the water flashes to steam pressing on the nozzle, and leaving at high speed. By the recoil the rocket accelerates in the opposite direction to the steam. The nozzle of hot water rockets must be able to withstand high pressure, hi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thermal Rocket
A thermal rocket is a rocket engine that uses a propellant that is externally heated before being passed through a nozzle to produce thrust, as opposed to being internally heated by a redox (combustion) reaction as in a chemical rocket. Thermal rockets can theoretically give high performance, depending on the fuel used and design specifications, and a great deal of research has gone into a variety of types. However, aside from the simple cold gas thruster and steam rocket, none have proceeded past the testing stage. Theory For a rocket engine, the efficiency of propellant use (the amount of impulse produced per mass of propellant) is measured by the specific impulse (I_\text), which is proportional to the effective exhaust velocity. For thermal rocket systems, the specific impulse increases as the square root of the temperature, and inversely as the square root of the molecular mass of the exhaust. In the simple case where a thermal source heats an ideal Monatomic gas reaction m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Evel Knievel
Robert Craig Knievel (October 17, 1938November 30, 2007), known professionally as Evel Knievel (), was an American stunt performer and entertainer. Throughout his career, he attempted List of Evel Knievel career jumps, more than 75 ramp-to-ramp motorcycle jumps. Knievel was inducted into the Motorcycle Hall of Fame in 1999. Evel Knievel was born in Butte, Montana. Raised by his paternal grandparents, Knievel was inspired to become a motorcycle daredevil after attending a Joie Chitwood auto daredevil show. He left high school early to work in the copper mines but was later fired for causing a city-wide power outage. After adopting the nickname "Evel Knievel", he participated in rodeos and ski jumping events, and served in the United States Army, U.S. Army before marrying Linda Joan Bork and starting a semi-pro hockey team. To support his family, Knievel started the Sur-Kill Guide Service and later worked as an insurance salesman. Eventually, he opened a Honda motorcycle dealers ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Walter HWK 109-507
The HWK 109-507 was a liquid-propellant rocket engine developed by Germany during World War II. It was used to propel the Hs 293 anti-ship guided missile. It was produced by Hellmuth Walter Kommanditgesellschaft (HWK). Like other Walter engines it used hydrogen peroxide as a propellant. Missile The Hs293 has been variously described as a missile or as a boosted glide bomb. It consisted of an SC500 bomb casing, fitted with wings, engine and radio control. Control equipment was housed in a rearward extension of the bomb casing but the motor was mounted in a separate housing beneath. It had originally been developed as an unpowered glide bomb, "Gustav Schwartz Propellerwerke", and the engine was added later. After flight tests, a visible tracking flare was also added, in a further rearward extension. As the engine was mounted below the missile fuselage, the exhaust nozzle pointed downwards at 30°, so as to align the line of thrust with the centre of gravity of the missile. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Walter HWK 109-500
The Walter HWK 109-500 was a Liquid-propellant rocket, liquid-fuelled rocket engine developed by Hellmuth Walter Kommanditgesellschaft, Walter in Germany during the World War II, Second World War. Description The 109-500 is a self-contained, modular monopropellant JATO, ''Starthilfe'' (take-off assist) engine in a pod, able to produce thrust for thirty seconds. After the fuel was expended, the pod was jettisoned and it returned to earth by parachute, with the parachute packed externally, onto the blunt forward end of the pod. The T-Stoff monopropellant, stored in the large spherical tank within the ''Starthilfe'' module's forward end, needed to react with a catalyst to provide the boosting thrust for an aircraft on takeoff - this Z-Stoff Sodium permanganate, sodium or Calcium permanganate, calcium-based, alkaline permanganate-compound (in an aqueous solution) catalyst was provided in a small tank above the reaction chamber just forward of the exhaust nozzle, with compressed a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Seveneves
''Seveneves'' is a science fiction novel by Neal Stephenson published in 2015. The story tells of the desperate efforts to preserve ''Homo sapiens'' in the wake of apocalyptic events on Earth after the unexplained disintegration of the Moon and the remaking of human society as a space-based civilization after a severe genetic bottleneck. Plot Part One In the near future, an unknown agent causes the Moon to shatter. As the pieces begin to collide with one another, astronomer and science popularizer "Doc" Dubois Harris calculates that Moon fragments will begin entering Earth's atmosphere, forming a white sky and blanketing the Earth within two years with what he calls a "Hard Rain" of bolides, causing the atmosphere to heat to incandescence and the oceans to boil away, rendering Earth uninhabitable for thousands of years. The world's leaders evacuate as many people and resources as possible to a swarm of "arklet" habitats called a "Cloud Ark" in orbit with the Internation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Steamboy
is a 2004 Anime, Japanese animated steampunk action film directed and co-written by Katsuhiro Otomo, produced by Bandai Namco Filmworks, Sunrise, it is his second major anime as a director, following ''Akira (1988 film), Akira'' (1988). The film was released in Japan by Toho on July 17, 2004. ''Steamboy'' was the most expensive Japanese film ever produced, with a () production budget, having been in production for ten years and utilizing more than 180,000 drawings and 440 CG cuts. Plot In 1863, where an alternate history (fiction), alternate nineteenth century Europe has made tremendous strides in steam-powered technologies, scientist Lloyd Steam and his son, Edward "Eddy" Steam, have succeeded in discovering a pure mineral water in Iceland which they believe can be harnessed as a nearly unlimited power source for steam engines. An experiment in Russian Alaska goes terribly wrong, with Eddy being engulfed in freezing gases, but results in the creation of a spherical device. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Steampunk
Steampunk is a subgenre of science fiction that incorporates retrofuturistic technology and Applied arts, aesthetics inspired by, but not limited to, 19th-century Industrial Revolution, industrial steam engine, steam-powered machinery. Steampunk works are often set in an alternate history, alternative history of the Victorian era or the American frontier, where steam power remains in mainstream use, or in a fantasy world that similarly employs steam power. Steampunk features anachronism, anachronistic technologies or retrofuturistic inventions as people in the 19th century might have envisioned them — distinguishing it from Neo-Victorianism — and is likewise rooted in the era's perspective on fashion, culture, architectural style, and art. Such technologies may include fictional machines like those found in the works of H. G. Wells and Jules Verne. Other examples of steampunk contain alternative-history-style presentations of such technology as steam cannons, lighter-than-ai ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Science Fiction
Science fiction (often shortened to sci-fi or abbreviated SF) is a genre of speculative fiction that deals with imaginative and futuristic concepts. These concepts may include information technology and robotics, biological manipulations, space exploration, time travel, Parallel universes in fiction, parallel universes, and extraterrestrials in fiction, extraterrestrial life. The genre often explores human responses to the consequences of projected or imagined scientific advances. Science fiction is related to fantasy (together abbreviated wikt:SF&F, SF&F), Horror fiction, horror, and superhero fiction, and it contains many #Subgenres, subgenres. The genre's precise Definitions of science fiction, definition has long been disputed among authors, critics, scholars, and readers. Major subgenres include hard science fiction, ''hard'' science fiction, which emphasizes scientific accuracy, and soft science fiction, ''soft'' science fiction, which focuses on social sciences. Other no ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Solar System
The Solar SystemCapitalization of the name varies. The International Astronomical Union, the authoritative body regarding astronomical nomenclature, specifies capitalizing the names of all individual astronomical objects but uses mixed "Solar System" and "solar system" structures in theinaming guidelines document. The name is commonly rendered in lower case ('solar system'), as, for example, in the ''Oxford English Dictionary'' an''Merriam-Webster's 11th Collegiate Dictionary''. is the gravitationally bound Planetary system, system of the Sun and the objects that orbit it. It Formation and evolution of the Solar System, formed about 4.6 billion years ago when a dense region of a molecular cloud collapsed, forming the Sun and a protoplanetary disc. The Sun is a typical star that maintains a hydrostatic equilibrium, balanced equilibrium by the thermonuclear fusion, fusion of hydrogen into helium at its stellar core, core, releasing this energy from its outer photosphere. As ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Payload Fraction
In aerospace engineering, payload fraction is a common term used to characterize the efficiency of a particular design. The payload fraction is the quotient of the payload mass and the total vehicle mass at the start of its journey. It is a function of specific impulse, propellant mass fraction and the structural coefficient. In aircraft, loading less than full fuel for shorter trips is standard practice to reduce weight and fuel consumption. For this reason, the useful load fraction calculates a similar number, but it is based on the combined weight of the payload and fuel together in relation to the total weight. Propeller-driven airliners had useful load fractions on the order of 25–35%. Modern jet airliners have considerably higher useful load fractions, on the order of 45–55%. For orbital rockets the payload fraction is between 1% and 5%, while the useful load fraction is perhaps 90%. Examples For payload fractions and fuel fractions in aviation, see Fuel Fract ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Homemade Astronauts
''Homemade Astronauts'' is a television show on Science Channel (Discovery Science USA) and Discovery+ that debuted in 2021. It featured DIY wannabe astronauts, who design and build their own equipment, in an attempt to reach the edge of space. The people are average Americans building on their farms, ranches, garages, and backyards. History Mike Hughes reached altitude in a manned steam rocket in 2018, filmed for the series, setting a record for an amateur manned rocket. Discovery Networks gave the greenlight for full series production in 2019, for airing on The Science Channel in 2020. In February 2020, during filming of an attempt by Mike Hughes to reach or in altitude, the steam rocket crashed on landing, killing Hughes. In March 2020, the show filmed an attempt by Kurt Anderson to break the world ice speed record in his rocket sled '' Arctic Arrow'' using a peroxide rocket, with the Rocketboys team. The attempt resulted in a crash that destroyed the dragster sled, reach ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mike Hughes (daredevil)
Michael Hughes (February 9, 1956 – February 22, 2020), popularly known as "Mad" Mike Hughes, was an American limousine driver, professed flat-Earther, and daredevil known for flying in self-built steam rockets. He died on February 22, 2020, while filming a stunt for an upcoming Science Channel television series. Although a public promoter of the flat Earth model, following his death his public relations representative said that Hughes had only used flat Earth as a PR stunt to acquire funding for his rockets. Background Hughes spent his childhood in Oklahoma City. He soon acquired an interest in motorcycle racing. In 2002, Hughes set a Guinness World Record with a jump in a Lincoln Town Car stretch limousine. He stated during an interview with the Associated Press in 2018 that he had planned to run for Governor of California. At the time of his death, Hughes had no close relatives, and lived by himself in Apple Valley, California. Rocket launches 2014 launch Accordin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
