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Rocket

About: Rocket is a research topic. Over the lifetime, 14018 publications have been published within this topic receiving 95852 citations. The topic is also known as: rockets.


Papers
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Patent
07 Mar 1997
TL;DR: In this paper, the authors proposed a reusable rocket airplane which may be used to launch satellites and other payloads into space and then return safely to be used again for surface-to-surface flight.
Abstract: A reusable rocket airplane which may be utilized to launch satellites and other payloads into space. The airplane may also be used for rapid surface to surface flight. The reusable rocket airplane may be safely supplied with oxidizer in mid-air, achieve an altitude outside the Earth's atmosphere, and return safely to be used again. The rocket airplane utilizes unique concepts to secure its gas turbine engines for high speed flight, minimize fluid spillage during mid-air oxidizer transfer, as well as employs design features advantageous to the economical building and reuse of the rocket airplane.

50 citations

Journal ArticleDOI
TL;DR: In this paper, an approximate technique for predicting microwave attenuation from propelant composition for a given motor configuration and missile trajectory is presented. But the prediction of the electron density requires treatment of the effects of thermal ionization of alkali metals, detachment and recombination processes during nozzle expansion, inviscid plume expansion, plume-air mixing, afterburning, and missile velocity and altitude.
Abstract: This paper summarizes an approximate technique for predicting microwave attenuation from propel]ant composition for a given motor configuration and missile trajectory. The solution involves calculations of electron density and collision frequency and knowledge of microwave frequency. The prediction of the electron density requires treatment of the effects of thermal ionization of alkali metals, detachment and recombination processes during nozzle expansion, inviscid plume expansion, plume-air mixing, afterburning, and missile velocity and altitude. The collision frequency is calculated using existing techniques and data. Effects of propellant composition, motor configuration, and missile trajectory are examined. Predicted X and K band attenuation is generally lower than measured values for sea level, static motor firings. This may be caused by other mechanisms not considered, such as chemi-ionizat ion. Predicted effects of mixing and afterburning were not great, but this area needs further study. Although the predictions are only approximate, they are useful for assessing microwave attenuation characteristics of rocket systems during early design and development stages.

50 citations

Patent
30 Aug 1943
TL;DR: In this paper, the subject of this invention is a novel type of propulsion jet- or rocket engine. It has been customary in the rocket type, engines to supply the propellentfluid, such as gasoline or nitric acid, under pressure to: the engine.
Abstract: The subject of this invention is a novel type. of propulsion jet- or rocket engine. It. has been customary in. rocket type, engines to supply the propellentfluid, such as gasoline or nitric- acid, under pressure to: the engine. The streams of the propellent in the engine, chamber after, injection...

49 citations

Journal ArticleDOI
TL;DR: The Black Brant V-C Echo 2 rocket was launched at Fort Churchill on September 25, 1972, and it injected 64-ms pulses of electron beams of 80-mA current and 45-keV voltage into the ionosphere.
Abstract: The Black Brant V-C Echo 2 rocket was launched at Fort Churchill on September 25, 1972, and it injected 64-ms pulses of electron beams of 80-mA current and 45-keV voltage into the ionosphere. This paper studies the responses of on-board electrostatic deflection and solid state detectors to injected electrons after motion in the near ionosphere and atmosphere. It is shown that it was only through some form of scattering that the detectors could sense the injected beam electrons. By means of ‘phase maps’ of injection and detection pitch angles a number of distinct regions are found corresponding to a rocket scattering halo, an atmospheric scattering halo, a region of weak responses, and a source of strong scattering above the rocket. The atmospheric scattering has been compared with the theoretical and experimental results of the Echo 1 experiment, and it is found to be in reasonable agreement. The rocket halo is discussed qualitatively; but no explanation is found for the backscatter from above the rocket, which may be associated with an occasional violent beam instability. This analysis has been carried out to better understand the complexities of electron motion observed near large rockets carrying artificial electron accelerators as a guide in the planning of future experiments.

49 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202211
2021373
2020480
2019624
2018537
2017493