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LR105
The LR105 is a Liquid-propellant rocket, liquid-fuel rocket engine that served as the sustainer engine for the Atlas (rocket family), Atlas rocket family. Developed by Rocketdyne in 1957 as the S-4, it is called a sustainer engine because it continues firing after the LR89, LR89 booster engines have been jettisoned, providing thrust during the ascent phase. Description The LR105 is a liquid-propellant engine using RP-1/Liquid oxygen, LOX. The engine operates on a gas-generator cycle, where a small portion of the propellant is burned in a gas generator to drive the turbopumps, which supply the engine with fuel and oxidizer. The engine was designed to be Throttleable rocket engine, throttleable, meaning its thrust could be adjusted during flight to optimize performance. The LR105 also features Regenerative cooling (rocketry), regenerative cooling, where RP-1 fuel is circulated through cooling channels in the engine's nozzle and combustion chamber before being injected into the co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rocketdyne
Rocketdyne is an American rocket engine design and production company headquartered in Canoga Park, California, Canoga Park, in the western San Fernando Valley of suburban Los Angeles, California, Los Angeles, in southern California. Rocketdyne was founded as a division of North American Aviation in 1955 and was later part of Rockwell International from 1967 until 1996 and Boeing from 1996 to 2005. In 2005, Boeing sold the Rocketdyne division to United Technologies Corporation, becoming Pratt & Whitney Rocketdyne as part of Pratt & Whitney. In 2013, Rocketdyne was sold to GenCorp, GenCorp, Inc., which merged it with Aerojet to form Aerojet Rocketdyne.Marjorie Censer(18 Dec 2022) L3Harris moves to acquire Aerojet Rocketdynefor $4.7 billion, after Lockheed Martin ended its attempt for Rocketdyne in Feb 2022 History After World War II, North American Aviation (NAA) was contracted by the Defense Department to study the German V-2, V-2 missile and adapt its engine to Society of Aut ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
LR89
The Rocketdyne LR89 was a liquid-fueled rocket engine developed in the 1950s by Rocketdyne, a division of North American Aviation. It was designed to serve as a booster engine the Atlas rocket family. The LR89 was a liquid oxygen (LOX) and RP-1 (kerosene) engine. It was used in configurations where it worked alongside the LR105 sustainer engine to enhance thrust in the first stage of the Atlas, being jettisoned when the vehicle weight had been considerably reduced due to propellant consumption. Description The LR89 was part of a family of engines that Rocketdyne developed to power the first American ICBMs and satellite launch vehicles. It was a gas-generator cycle engine, in which a portion of the fuel and oxidizer is burned to drive a turbine, which powers the fuel pumps, and featured a hypergolic igniter. Versions The LR89 engine underwent several upgrades throughout its operational life, resulting in multiple versions: Atlas stage The LR89 powered the first Atlas s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Air Zoo December 2019 099 (Atlas Sustainer Engine)
An atmosphere () is a layer of gases that envelop an astronomical object, held in place by the gravity of the object. A planet retains an atmosphere when the gravity is great and the temperature of the atmosphere is low. A stellar atmosphere is the outer region of a star, which includes the layers above the opaque photosphere; stars of low temperature might have outer atmospheres containing compound molecules. The atmosphere of Earth is composed of nitrogen (78%), oxygen (21%), argon (0.9%), carbon dioxide (0.04%) and trace gases. Most organisms use oxygen for respiration; lightning and bacteria perform nitrogen fixation which produces ammonia that is used to make nucleotides and amino acids; plants, algae, and cyanobacteria use carbon dioxide for photosynthesis. The layered composition of the atmosphere minimises the harmful effects of sunlight, ultraviolet radiation, solar wind, and cosmic rays and thus protects the organisms from genetic damage. The current composition of t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Atlas-Agena
The Atlas-Agena was an American expendable launch system derived from the SM-65 Atlas missile. It was a member of the Atlas (rocket family), Atlas family of rockets, and was launched 109 times between 1960 and 1978. It was used to launch the first five Mariner program, Mariner uncrewed probes to the planets Venus and Mars, and the Ranger program, Ranger and Lunar Orbiter program, Lunar Orbiter uncrewed probes to the Moon. The upper stage was also used as an uncrewed orbital Agena target vehicle, target vehicle for the Project Gemini, Gemini crewed spacecraft to practice space rendezvous, rendezvous and docking and berthing of spacecraft, docking. However, the launch vehicle family was originally developed for the Air Force and most of its launches were classified DoD payloads. The Atlas-Agena was a two-and-a-half-stage rocket, with a SM-65 Atlas#'Stage-and-a-half', stage-and-a-half Atlas missile as the first stage, and an RM-81 Agena second stage. Initially, SM-65D Atlas, Atlas D m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rocket Engines Using The Pressure-fed Cycle
A rocket (from , and so named for its shape) is a vehicle that uses jet propulsion to accelerate without using any 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. Multistage rockets are capable of attaining escape velocity from Earth and therefore can achieve unlimited maximum altitude. Compared with airbreathing engines, rockets are lightweight and powerful and capable of generating large accelerations. To control their flight, rockets rely on momentum, airfoils, auxiliary reaction engines, gimballed thrust, momentum wheels, deflection of the exhaust stream, propellant flow, spin, or gravity. Rockets for military and recreational uses date back to at least 13th-century China. Signi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rocket Engines Using Kerosene Propellant
A rocket (from , and so named for its shape) is a vehicle that uses jet propulsion to accelerate without using any 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. Multistage rockets are capable of attaining escape velocity from Earth and therefore can achieve unlimited maximum altitude. Compared with airbreathing engines, rockets are lightweight and powerful and capable of generating large accelerations. To control their flight, rockets rely on momentum, airfoils, auxiliary reaction engines, gimballed thrust, momentum wheels, deflection of the exhaust stream, propellant flow, spin, or gravity. Rockets for military and recreational uses date back to at least 13th-century China. Significa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
SM-65 Atlas
The SM-65 Atlas was the first operational intercontinental ballistic missile (ICBM) developed by the United States and the first member of the Atlas rocket family. It was built for the U.S. Air Force by the Convair Division of General Dynamics at an assembly plant located in Kearny Mesa, San Diego. Development dates to 1946, but over the next few years the project underwent several cancellations and re-starts. The deepening of the Cold War and intelligence showing the Soviet Union was working on an ICBM design led to it becoming a crash project in late 1952, along with the creation of several other missile projects to ensure one would enter service as soon as possible. The first test launch was carried out in June 1957, which failed. The first success of the Soviet R-7 Semyorka in August gave the program new urgency, leading to the first successful Atlas A launch in December. Of the eight flights of the A model, only three were successful, but the later models demonstr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rocketdyne LR-101
The LR-101 is a fixed thrust, single start vernier thruster developed by Rocketdyne in the mid-to-late fifties and used in the SM-65_Atlas, Atlas, PGM-17_Thor, Thor and Delta_(rocket_family), Delta Launch_vehicle, launch vehicles until 1990. Each of these rockets used two LR-101 secondary engines to provide Ship_motions, yaw, pitch and roll control during their ascent to space. The pair of LR-101 Vernier_thruster, vernier thrusters would receive their propellant flow from the Turbopump, turbopumps of the sustainer engine until it was shut off. After sustainer burnout, this pair of thrusters would switch to feed off the remaining propellant, effectively becoming a Pressure-fed_engine (rocket), Pressure-fed engine. The remaining fuel would then be spent for the last trajectory corrections and Reaction_control_system, stabilization of the rocket before separating the payload. Variants Due to several modifications the LR-101 underwent over the years, there are many different varia ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Atlas I
The Atlas I was a US expendable launch system manufactured by General Dynamics in the 1990s to launch a variety of satellites. It was largely a commercial rebrand of the Atlas G (although it did fly multiple government payloads), but did feature several electrical and guidance improvements. Atlas I did not feature any major payload capacity improvements over its predecessor but did offer a larger payload fairing option. Eleven launches took place, with three failures. Atlas I would be further developed and improved upon to produce the highly successful Atlas II rocket. Background The production line of Atlas G, the predecessor to Atlas I, was wound down and eventually mothballed in the 1980s as the Space Shuttle came online. The Shuttle's promise of a rapid launch cadence and lower launch costs resulted in dwindling demand for Atlas, and expendable rockets as a whole. However, the Space Shuttle Challenger disaster in January 1986 caused second-guessing of the Shuttle's ability ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Atlas G
The Atlas G, also known as Atlas G Centaur-D1AR was an American expendable launch system derived from the Atlas-Centaur. It was a member of the Atlas family of rockets and was used to launch seven communication satellites during the mid to late 1980s. Atlas G consisted of an improved Atlas core with modernized avionics and stretched propellant tanks. The Centaur stage also had several updated components and other technical improvements. Atlas G flew 7 times, with all missions aiming to go to a geostationary transfer orbit. It was replaced by the near-identical Atlas I, which had an improved guidance system and offered a larger payload fairing. Description Atlas first stage Atlas G was an evolution of the Atlas-Centaur, boasting numerous performance improvements. Compared to its predecessor, Atlas G featured an 81-inch stretch of its first-stage propellant tanks and a new MA-5 engine section on its first stage, increasing its thrust by . The first stage MA-5 engine section consis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Atlas H
The Atlas H was an American expendable launch system derived from the SM-65 Atlas missile. It was a member of the Atlas (rocket family), Atlas family of rockets, and was used to launch five clusters of Naval Ocean Surveillance System, NOSS satellites for the US National Reconnaissance Office. Two flights also carried Living Plume Shield (satellite), LiPS satellites, as secondary payloads for the United States Naval Research Laboratory. The Atlas H was a stage and a half rocket, using the enhanced Atlas rocket designed for use as the first stage of the Atlas G rocket, which differed from the Atlas H in having a Centaur (rocket stage), Centaur upper stage. This stage was later reused as the first stage of the Atlas I. In practice, an MSD (rocket stage), MSD upper stage was flown on all five launches. Atlas H could put a payload of 3,630 kg (8,000 lb) into low Earth orbit, or a payload of 2,255 kg (4,971 lb) into a geostationary transfer orbit. Launches The At ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
