Specific impulse (usually abbreviated Isp) is a measure of how efficiently a reaction mass engine, such as a rocket using propellant or a jet engine using...

The Variable Specific Impulse Magnetoplasma Rocket (VASIMR) is an electrothermal thruster under development for possible use in spacecraft propulsion....

In classical mechanics, impulse (symbolized by J or Imp) is the change in momentum of an object. If the initial momentum of an object is p1, and a subsequent...

than continuous, at least when the Reynolds number is greater than 6. Specific impulse (usually abbreviated Isp) is a measure of how effectively a rocket...

thrust, but are the least propellant-efficient (they have the lowest specific impulse). The ideal exhaust is hydrogen, the lightest of all elements, but...

{\displaystyle I_{\text{sp}}} is the specific impulse h PR {\displaystyle h_{\text{PR}}} is fuel heat of reaction Specific impulse is often used as the unit of...

System-specific Impulse, Issp is a measure that describes performance of jet propulsion systems. A reference number is introduced, which defines the total...

the amount of specific power required compared to chemical rockets. Ion thrusters are therefore able to achieve high specific impulses. The drawback of...

sea level and 420 kN (95,000 lbf) in vacuum, and performing with a specific impulse of 261 s (2.56 km/s) at sea level and 303 s (2.97 km/s) in vacuum....

increasing propellant mass per volume as well as engine performance. Specific impulse is increased, and the risk of cavitation at inputs to the turbopumps...

second. An equivalent measure, the net impulse per weight unit of propellant expelled, is called specific Impulse, I s p {\displaystyle I_{sp}} , and this...

been proposed for some types of propulsion (for example, Variable Specific Impulse Magnetoplasma Rocket, VASIMR), in which the flow of plasma or ions...

a high specific impulse, and a high specific impulse per unit volume of propellant should be considered. Overview of the specific impulses of propellants...

electrostatic ion thruster called HiPEP which will have higher efficiency, specific impulse, and a longer lifetime than NSTAR.[citation needed] In 2006, Aerojet...

have reasonably high density and their combustion products have high specific impulse (Isp). This allows the volume of the propellant tanks to be relatively...

Space Shuttle main engine. With refinements a theoretical maximum specific impulse of 100,000 s (980 km/s) (1 MN·s/kg) might be possible. Thrusts were...

by using nitrocellulose, improving the overall specific impulse. The aluminium improves specific impulse as well as combustion stability. High performing...

with propellant. It uses Saiph bipropellant thrusters which have a specific impulse (Isp) of 290 s. It can impart a delta-v of from 500 m/s with 300 kg...

Rocketdyne A-7 engine Thrust, 83,000 lbf (370 kN) burning time, 155 s specific impulse, 235 s (2.30 kN·s/kg) propellants, liquid oxygen, as oxidizer, and...

effective exhaust velocity; I sp {\displaystyle I_{\text{sp}}} is the specific impulse in dimension of time; g 0 {\displaystyle g_{0}} is standard gravity;...

that NERVA had the designed specific impulse of 811 seconds (7.95 km/s); solid-propellant rockets have a maximum impulse of around 300 seconds (2.9 km/s)...

powered by a four-nozzle engine that produced 220 KN of thrust and had a specific impulse (in vacuum) of 280 seconds. A cylindrical black ring supporting four...

the propellants by their exhaust velocity relative to the rocket (specific impulse). A rocket can be thought of as being accelerated by the pressure of...

000 lb) Powered by 30 YF-215 Maximum thrust 60 MN (13,000,000 lbf) Specific impulse 330 s (3.2 km/s) Propellant CH4 / LOX Second stage Diameter 10.6 m...

called specific impulse. This is a measure of the amount of impulse that can be obtained from a fixed amount of reaction mass. The higher the specific impulse...

of thrust (newtons, or N), hence thrust-specific. This figure is inversely proportional to specific impulse, which is the amount of thrust produced per...

level: 17,500 kN (3,900,000 lbf) Vacuum: 19,544 kN (4,394,000 lbf) Specific impulse Sea level: 301.6 s (2.958 km/s) Vacuum: 337 s (3.30 km/s) Burn time...

Specific humidity, mass of water vapor per unit mass dry air Specific impulse, impulse (momentum change) per unit of propellant (either per unit of propellant...

thrust and impulse density, allowing for smaller, lighter tanks. In the second, it burns only hydrogen, allowing for greater specific impulse. The RD-701...

thrust 1,920 kN (430,000 lbf) Total thrust 7,680 kN (1,730,000 lbf) Specific impulse 310.7 s (3.047 km/s) Burn time 214 seconds Propellant RP-1/LOX First...