Liquid rockets have been built as monopropellant rockets using a single type of propellant, bipropellant rockets using two types of propellant, or more exotic tripropellant rockets using three types of propellant.

Liquid propellant rockets can be throttled in realtime, and have control of mixture ratio ; they can also be shut down, and, with a suitable ignition system or self-igniting propellant, restarted.

Liquid propellants are also sometimes used in hybrid rockets, in which they are combined with a solid or gaseous propellant.

Liquid, cryogenic rockets keep their propellant in tanks.

The High Energy Liquid Laser Area Defense System ( HELLADS ), is a Counter-RAM system under development that will use a powerful ( 150 kW ) laser to shoot down missiles, rockets, and artillery shells.

Liquid oxygen is a common liquid oxidizer propellant for spacecraft rocket applications, usually in combination with liquid hydrogen or kerosene.

* Boost Propulsion: Liquid fuelled rocket, LOX and Kerosene.

Liquid systems enable higher specific impulse than solids and hybrid rocket engines and can provide very high tankage efficiency.

* Liquid rocket propellants

The first number in the sequence indicates the number of stages ; the second the number of LRBs ( Liquid rocket boosters ); the third the number of SRBs ; and, if present, the fourth number shows the number of SSBs.

* 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.

# REDIRECT Liquid rocket booster

It uses the storable Liquid rocket propellants N2O4 / UDMH.

Liquid hydrogen is also used both as a fuel and as a coolant to cool nozzles and combustion chambers of rocket engines.

* Liquid fuel rocket

Liquid rocket propellants —

* Liquid air cycle engine / Reaction Engines SABRE

* Liquid Air Cycle Engine-a related engine cycle that liquifies the air

A Liquid Air Cycle Engine ( LACE ) is a type of spacecraft propulsion engine that attempts to increase its efficiency by gathering part of its oxidizer from the atmosphere.

it: Liquid air cycle engine

Liquid hydrogen engines were first successfully developed in America, the RL-10 engine first flew in 1962.

* Liquid air cycle engine

The engine is a SOHC 3-valve Liquid Cooled V-Twin with a six-speed shaft drive transmission.

The engine is a SOHC three-valve Liquid Cooled V-Twin with a six-speed, shaft drive transmission from 1984 to 1987.

The new engine is a SOHC Liquid Cooled V-twin with a five-speed, shaft drive transmission for 1985 and 1986.

This allowed the use of Liquid Petroleum fuel for the first time and made the use of the engine in transportation feasible.

** Liquid Cooled V-twin SOHC engine

By 1959 this work had resulted in the Recoverable Orbital Launch System, or ROLS, based around a LACE engine, known at the time as a Liquid Air Collection System, or LACES.

Liquid air cycle engine —

Liquid ink electrostatic printer use a chemical coated paper, which is charged by the print head according to the image of the document.

Liquid crystals find wide use in liquid crystal displays, which rely on the optical properties of certain liquid crystalline substances in the presence or absence of an electric field.

Liquid crystal lasers use a liquid crystal in the lasing medium as a distributed feedback mechanism instead of external mirrors.

Liquid hydrocarbon fuels are the most commonly used forms of energy storage for use in transportation, but because the byproducts of the reaction that utilizes these liquid fuels ' energy ( combustion ) produce greenhouse gases other energy carriers like hydrogen can be used to avoid production of greenhouse gases.

Liquid propellants generally have densities similar to water ( with the notable exceptions of liquid hydrogen and liquid methane ), and these types are able to use lightweight, low pressure tanks and typically run high-performance turbopumps to force the propellant into the combustion chamber.

Liquid shellac has a limited shelf life ( about 1 year ), hence it is sold in dry form for dissolution prior to use.

Liquid crystal displays ( LCDs ), such as television and computer screens, use light that is polarized by a filter as it enters the liquid crystal, to allow the liquid crystal to modulate the intensity of the transmitted light.

Bomb disposal technicians wearing bomb suits to protect against an Improvised Explosive Device ( IED ) use a small, ice-based chiller unit strapped to their leg with a Liquid Circulating Garment, usually a vest, worn over their torso to maintain their core temperature at safe levels.

He would also use it with Liquid Tension Experiment, and in sessions for bands including Pink Floyd and Yes.

Liquid fuel lanterns remain popular where the fuel ( see portable stove for a discussion on fuel ) is easily obtained and is in common use.

Liquid oxygen was also used in some early ICBMs, although more modern ICBMs do not use liquid oxygen because its cryogenic properties and need for regular replenishment to replace boiloff make it harder to maintain and launch quickly.

Liquid oxygen also had extensive use in making oxyliquit explosives, but is rarely used now due to a high rate of accidents.

" Liquid Crystal Display User Interface " would reflect the fact that mobile phones normally use LCDs ; however, the API is not specifically tailored to this particular display technology.

** Liquid crystal display television ( LCD TV ), color TVs that use LCD technology to produce images

Liquid crystal displays use 100 % of their surface to display, thus the VIS is the actual size presented to the viewer.

SPACEHAB module experiments that were activated included the Organic Separations payload, which is designed to investigate cell separation techniques for possible pharmaceutical and biotechnology processing, and the Equipment for Controlled Liquid Phase Sintering Experiment package, a furnace designed to explore the possibilities of creating stronger, lighter and more durable metals for use in bearings, cutting tools and electronics.

* The Battle of Hooge 30th and 31st July 1915 -( First use of German Liquid Fire Attack-Flamethrowers )

* Liquid mirror telescopes, may use a layer of reflective mercury

Liquid breathing has also been proposed for use in deep diving and space travel.

Development made use of on an earlier programme by the Fairey Aviation Company known as " LOPGAP " ( Liquid Oxygen / Petrol Guided Anti-aircraft Projectile ), and a Victory Ship specially converted into prototype escort ship, RFA Girdle Ness, was procured.

* Liquid Ioniser purifiers use a capillary to feed liquid into an ionisation field that creates electrically charged liquid ions.

Liquid dancers use a variety of techniques rhythmically strung together to create an illusion of continuous flow that corresponds to the music.

Liquid funk has stronger influences from soca, latin, disco, jazz, and funk music, while IDB creates a calmer yet more synthetic sound, using smooth synth lines and samples in place of the organic element achieved by use of real instruments.

In 1984, a trial was carried out with a four 0305 buses already in use in Auckland, New Zealand with two powered by Liquid Petroleum Gas and two with Compressed Natural Gas.