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Retrorocket X reviews
A retrorocket short for retrograde rocket is a rocket engine providing thrust opposing the motion of a vehicle, thereby causing it to decelerate. They have mostly been used in spacecraft , with more limited use in short-runway aircraft landing. New uses are emerging since for retro-thrust rockets in reusable launch systems. Originally a request from the British Army as a method to drop heavy equipment or vehicles from aircraft flying at high speeds and altitudes, the project turned out to be a huge disaster and was largely forgotten after the war. Although some of the tests turned out to be successful, Hajile was too unpredictable to be used in conventional warfare, and by the time the war drew to a close, with no chance to put the project into action, it was shelved. Later Soviet experiments used this technique, braking large air-dropped cargos after a parachute descent. To ensure clean separation and prevent contact, multistage rockets may have small retrorockets on lower stages, which ignite upon stage separation. Meanwhile, the succeeding stage may have ullage rockets , both to aid separation and ensure good starting of liquid-fuel engines. When a spacecraft in orbit is slowed sufficiently, its altitude decreases to the point at which aerodynamic forces begin to rapidly slow the motion of the vehicle, and it returns to the ground. Without retrorockets, spacecraft would remain in orbit for years until their orbits naturally slow, and reenter the atmosphere at a much later date; in the case of manned flights, long after life support systems have been expended. Therefore, it is critical that spacecraft have extremely reliable retrorockets. One was sufficient to return the spacecraft to Earth if the other two failed. For lunar flights, the Apollo command and service module did not require retrorockets to return the command module to Earth, as the flight path took the module through the atmosphere , using atmospheric drag to reduce velocity. The test flights in Earth orbit required retrograde propulsion, which was provided by the large Service Propulsion Engine on the service module. The same engine was used as a retrorocket to slow the spacecraft for lunar orbit insertion. The Apollo Lunar Module used its descent stage engine to drop from orbit and land on the Moon. The Space Shuttle Orbital maneuvering system provided the vehicle with a pair of powerful liquid-fueled rockets for both reentry and orbital maneuvering. One was sufficient for a successful reentry, and if both systems were to fail, the reaction control system could slow the vehicle enough for reentry. Retrorockets are also used in landing spacecraft on other astronomical bodies, such as the Moon and Mars , as well as enabling a spacecraft to enter an orbit around such a body, when otherwise it would scoot past and off into space again. As pointed out above in connection with Project Apollo the main rocket on a spacecraft can be re-oriented to serve as a retrorocket. The Soyuz capsule uses small rockets for the last phase of landing. New uses for retro-thrust rockets emerged since for reusable launch systems. The first stage is then recovered, refurbished and prepared for the next flight. The boosters of other orbital rockets are routinely destroyed after a single use by atmospheric reentry and high-speed impact in the ocean. New Shepard is a reusable single-stage suborbital rocket where the booster uses its main engine to land again after a flight. The capsule slows its descent with parachutes and uses retrorockets to slow down just before reaching the ground. Operation Credible Sport , a plan put forward by the US government in to rescue the hostages in Iran resulted in the construction of two modified Lockheed C Hercules , designated YMCH, which featured retro-rockets to allow it to perform extremely short landings. As part of the plan, these aircraft would land in the Shahid Shiroudi Stadium near the US Embassy in Tehran and use the retrorockets to come to a stop. One aircraft was destroyed in a crash during a test flight without any fatalities, and the plan was scrapped later that year. From Wikipedia, the free encyclopedia. This article has multiple issues. Please help improve it or discuss these issues on the talk page. Learn how and when to remove these template messages. This article possibly contains original research. Please improve it by verifying the claims made and adding inline citations. Statements consisting only of original research should be removed. June Learn how and when to remove this template message. This article includes a list of references , but its sources remain unclear because it has insufficient inline citations. Please help to improve this article by introducing more precise citations. Encyclopedia of Weapons of World War 2. Metro Books. Retrieved 8 January Retrieved 7 January Categories : Rocket propulsion Spacecraft components. Hidden categories: Articles that may contain original research from June All articles that may contain original research Articles lacking in-text citations from June All articles lacking in-text citations Articles with multiple maintenance issues. Namespaces Article Talk. Views Read Edit View history. By using this site, you agree to the Terms of Use and Privacy Policy.
Retrorocket X reviews
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Retrorocket X reviews
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Retrorocket X reviews
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