Liquid rocket booster

Liquid rocket booster

A Liquid Rocket Booster (LRB) is similar to a solid rocket booster (SRB) attached to the side of a rocket to give it extra lift at takeoff. A Liquid Rocket Booster has fuel and oxidiser in liquid form, as opposed to a solid rocket or hybrid rocket.

Like solid boosters, liquid boosters can considerably increase the total payload to orbit. Unlike solid boosters, LRBs can be throttled down and are also even capable of being shut down safely in an emergency, providing additional escape options to manned spacecraft.

For the R7 missile, which later evolved into the Soyuz launch vehicle, this concept was chosen because it allows all of its many rocket engines to be ignited and checked for function with the rocket still on the launch pad. This avoided the complications of starting the engines of the second stage in-flight as in a "traditional" staged design.

The Soviet Energia rocket of the 1980s used four Zenit liquid fueled boosters to loft both the Shuttle Buran and the experimental Polyus space battlestation in two separate launches.

Two versions of the Japanese H-IIA space rocket use (or will use) one or two LRBs to be able to carry extra cargo to higher geostationary orbits.

The Ariane 4 space launch vehicle also optionally could use two or four LRBs (the 42L, 44L, and 44LP configurations). As an example of the payload increase that boosters provide, the basic Ariane 40 model with no boosters could launch around 2,175 kilograms into a transfer orbit to Geostationary transfer orbit [] . The 44L configuration could launch 4,790 kg to the same orbit with four liquid boosters added [] .

Various LRBs were considered early in the Space shuttle development program. More recently, after the Challenger accident, LRBs were considered to replace the existing SRBs, and four companies proposed booster designs to NASA. While very attractive from the performance and safety perspective, the cost of developing the systems resulted in the decision to stick with (and improve as much as possible) the existing solid boosters.

Common Core Booster

The Evolved Expendable Launch Vehicle program produced new liquid fueled primary stages for the Atlas V and the Delta IV rockets called Common Core Booster (CCB) or Common Booster Core (CBC). These can be used alone (with possible strap-on solid rocket boosters) or in a configuration of three CCBs tied together

ee also

* rocket launch
* spacecraft propulsion
* solid rocket booster
* Common Core Booster

Wikimedia Foundation. 2010.

Look at other dictionaries:

  • Solid rocket booster — Solid rocket boosters (SRB) (or motors, SRM) are used to provide the main thrust in spacecraft launches from the launchpad up to burnout of the SRBs. Many launch vehicles include SRBs, including the Ariane 5, Atlas V, and the NASA Space Shuttle.… …   Wikipedia

  • Space Shuttle Solid Rocket Booster — The Space Shuttle Solid Rocket Boosters (SRBs) are the pair of large solid rockets used by the Space Shuttle during the first two minutes of powered flight. They are located on either side of the orange external propellant tank. Each SRB produces …   Wikipedia

  • Booster (rocketry) — In spaceflight, a booster may be either: * an entire launch vehicle or launcher used to lift a spacecraft. Initially all boosters used for human spaceflight and most unmanned boosters used liquid propellant, at least for the core launch vehicle.… …   Wikipedia

  • Booster (Raketenantrieb) — Ein „GEM 40“ Feststoffbooster vor der Montage an eine Delta II Rakete …   Deutsch Wikipedia

  • Rocket propellant — is mass that is stored, usually in some form of propellant tank, prior to being used as the propulsive mass that is ejected from a rocket engine in the form of a fluid jet to produce thrust.Chemical rocket propellants are most commonly used,… …   Wikipedia

  • rocket and missile system — ▪ weapons system Introduction       any of a variety of weapons systems that deliver explosive warheads to their targets by means of rocket propulsion.       Rocket is a general term used broadly to describe a variety of jet propelled missiles… …   Universalium

  • Rocket engine — RS 68 being tested at NASA s Stennis Space Center. The nearly transparent exhaust is due to this engine s exhaust being mostly superheated steam (water vapor from its propellants, hydrogen and oxygen) …   Wikipedia

  • rocket — n. device propelled by a rocket engine or explosives 1) to fire; launch a rocket 2) a booster; liquid fuel; long range; multistage; solid fuel rocket reprimand (colloq.) (BE) 3) to give smb. a rocket 4) to get a rocket * * * [ rɒkɪt] launch a… …   Combinatory dictionary

  • Modular rocket — A Delta IV Heavy, featuring three Common Booster Cores; one used as the first stage and two as boosters. A modular rocket is a type of multistage rocket which features components that can be interchanged for specific mission requirements. Several …   Wikipedia

  • Long March (rocket family) — A Long March rocket (simplified Chinese: 长征系列运载火箭; traditional Chinese: 長征系列運載火箭; pinyin: Chángzhēng xìliè yùnzài huǒjiàn) or Chang Zheng rocket as in Chinese pinyin is any rocket in a family of expendable launch systems operated by the People s… …   Wikipedia