In a restricted sense, the load-bearing base or platform from which a rocket vehicle is launched.
A device for efficiently converting the energy of a hot gas to kinetic energy (energy of motion).
The step-by-step process leading to a launch. It runs according to a prearranged schedule, measured in terms of T-time.
The separation of a portion of a rocket or spacecraft by explosive force. The Solid Rocket Boosters of the Space Shuttle, for example.
Unstable, longitudinal (up and down) oscillations induced in a launch system, mainly due to fuel sloshing and engine vibration.
The ratio of a rocket engine's thrust to the weight of fuel burned in one second.
A design feature of rockets in which one stage is mounted directly onto another.
Also called chugging, a characteristic, low-frequency pulsating noise associated with the irregular burning of fuel in a rocket engine.
The total operating time of a rocket engine. For solid-propellant rockets, this is the more-or-less unstoppable period of thrust until all of the fuel is used.
A transition section at the tail of a rocket (or other vehicle) that gradually narrows the body down to the motor diameter.
The vapor loss from a volatile liquid – for example, liquid oxygen – particularly when stored in a vehicle ready for flight.
The average time spent by a gas molecule in a liquid-propellant rocket engine's combustion chamber before exiting from and producing thrust.
Controlling the flight of a rocket or missile by controlling the direction of thrust.
Found in some high-thrust liquid-propellant rocket engines. It increases the flow of propellant to the combustion chamber to increase performance.
Occurs when the propellant burns in such a way that the thrust produced by the rocket motor and the pressure of combustion remain constant.
A section of aircraft surface, or an attached structure, designed to reduce drag.
A deep cavity built into a launch pad to receive hot gases during rocket thrust buildup.
A rocket launched into orbit in an easterly direction so that Earth's rotation augments the rocket's velocity. Most launches are of this type.
Any rocket motor or engine that is started after first motion of the vehicle.
Seen in some liquid rocket engines in which the turbopump is driven by hot gases bled from the combustion chamber during main stage operation.
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