Portal:Rocketry
The Rocketry Portal
A rocket (from Italian: rocchetto, lit. 'bobbin/spool') is a vehicle that uses jet propulsion to accelerate without using the surrounding air. A rocket engine produces thrust by reaction to exhaust expelled at high speed. Rocket engines work entirely from propellant carried within the vehicle; therefore a rocket can fly in the vacuum of space. Rockets work more efficiently in a vacuum and incur a loss of thrust due to the opposing pressure of the atmosphere.
spin, or gravity
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Rockets for military and recreational uses date back to at least 13th-century
artificial satellites, human spaceflight, and space exploration
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hybrid propellant system). Chemical rockets store a large amount of energy in an easily released form, and can be very dangerous. However, careful design, testing, construction and use minimizes risks. (Full article...
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A
Improved Orion, lifting 270–450-kg (600–1,000-pound) payloads into the exoatmospheric region between 97 and 201 km (60 and 125 miles). (Full article...
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In the news
- 14 March 2024 – SpaceX Starship integrated flight test 3
- SpaceX successfully launches the first Starship rocket, the most powerful rocket ever built, at Starbase in Texas, United States, after two previous failed attempts. The rocket reached an altitude of more than 200 kilometres (120 mi), but was destroyed during re-entry. (Al Jazeera)
- 12 March 2024 – Israel–Hezbollah conflict
- Hezbollah launches more than 100 Katyusha rockets into northern Israel, targeting several Israeli military outposts. (The New York Times)
Topics
- Reusable launch system
- Apogee kick motor
- Dual-thrust
- Rocket turbine engine
- Thrust curve
General images -
The following are images from various rocketry-related articles on Wikipedia.
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Robert Esnault-Pelterie (1909). (from History of rockets)
- Von Braun's rocket team in 1961 (from
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A semi-active missilehoming system (from Missile)
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A simplified diagram of a solid-fuel rocket.(from Missile)
- A propellant is packed with a hole in the middle
- An igniter combusts the propellant
- The hole acts as a combustion chamber
- The hot exhaust is choked at the throat
- Exhaust exits the rocket
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Typical ballistic missile sequence:(from Missile)
- 1. Launches by firing motor1(A)
- 2. Stage1 drops, motor2(B) ignites & shroud(E) ejects
- 3. Motor3(C) ignites and separates
- 4. Stage3 terminates and post-boost vehicle(D) separates
- 5. Vehicle maneuvers itself and prepares re-entry vehicle (RV)
- 6. RV with decoys and chaffs deploys
- 7. RV re-enters the atmosphere
- 8. Warhead(s) detonate on target
- The
- Robert Anderson suggests using metal for rocket casing (from
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V-2 rocket. (from History of rockets)Layout of a
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Simplified diagram of a liquid-fuel rocket:(from Rocket engine)
- Liquid fuel tank
- Liquid oxidiser tank
- Pumps feed fuel and oxidiser under high pressure.
- Combustion chamber mixes and burns the propellants.
- Exhaust nozzle expands and accelerates the gas jet to produce thrust.
- Exhaust exits nozzle.
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fire arrow launchers as depicted in the Wubei Zhi (17th century). The launcher is constructed using basketry. (from History of rockets)An illustration of
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Simplified diagram of a solid-fuel rocket:(from Rocket engine)
- Solid fuel–oxidiser mixture (propellant) packed into casing
- Igniter initiates propellant combustion.
- Central hole in propellant acts as the combustion chamber.
- Exhaust nozzle expands and accelerates the gas jet to produce thrust.
- Exhaust exits nozzle.
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Wubei Zhi (17th century) (from History of rockets)Rocket carts from the
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Wubei Zhi (17th century). A double-ended rocket pod that carries 30 small poisoned rockets on each end for a total of 60 rockets. It carries a sling for transport. (from History of rockets)The 'convocation of eagles chasing hare' rocket launcher from the
- Robert Goddard and the first liquid-fueled rocket. (from
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Wubei Zhi (17th century). It carries 32 medium small poisoned rockets and comes with a sling to carry on the back. (from History of rockets)A "long serpent enemy breaking" fire arrow launcher as depicted in the
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Robert Goddard (from History of rockets)
- Opel RAK.1 - World's first public manned flight of a rocket plane on September 30, 1929. (from
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Armadillo Aerospace's quad vehicle showing visible banding (shock diamonds) in the exhaust jet (from Rocket engine)
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Diamant rocket, the second French rocket program, developed from 1961 (from History of rockets)French
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V-1 flying bomb, amongst the first guided missiles (from Missile)A
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Meillerwagen. (from History of rockets)A German V-2 rocket on a
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Battle of Stalingrad, 6 October 1942 (from History of rockets)A battery of Katyusha launchers fires at German forces during the
- Rocket thrust is caused by pressures acting in the combustion chamber and nozzle. From Newton's third law, equal and opposite pressures act on the exhaust, and this accelerates it to high speeds. (from
- Rocket vehicle mechanical efficiency as a function of vehicle instantaneous speed divided by effective exhaust speed. These percentages need to be multiplied by internal engine efficiency to get overall efficiency. (from
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ATomahawk cruise missile in flight (from Missile)
- The four expansion regimes of a de Laval nozzle:• under-expanded• perfectly expanded• over-expanded• grossly over-expanded (from
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