# Exhaust Velocity

### Some articles on velocity, exhaust velocity, exhaust:

Mass Ratio - Derivation
... rocket equation where Δv is the desired change in the rocket's velocity ve is the effective exhaust velocity (see specific impulse) m0 is the initial ... This equation indicates that a Δv of times the exhaust velocity requires a mass ratio of ... For instance, for a vehicle to achieve a of 2.5 times its exhaust velocity would require a mass ratio of (approximately 12.2) ...
Reaction Engine - Energy Use - Propulsive Efficiency
... need energy amounting to (where M is the mass of propellent expended and is the exhaust velocity), which is simply the energy to accelerate the exhaust ... indeed usually most of it, ends up as kinetic energy of the exhaust ... This comes to an exhaust velocity of about ⅔ of the mission delta-v (see the energy computed from the rocket equation) ...
Project Orion (nuclear Propulsion) - Basic Principles
... The Orion nuclear pulse drive combines a very high exhaust velocity, from 12 to 19 mi/s (19 to 31 km/s) in typical interplanetary designs, with meganewtons of thrust ... propulsion, since the kinetic energy of exhaust goes up with velocity squared (kinetic energy = ½ mv2), whereas the momentum and thrust goes up with velocity linearly (momentum = mv), obtaining a particular level ... is actually inversely proportional to Isp if power going into exhaust is constant or at its limit from heat dissipation needs or other engineering constraints) ...
Rocket Propellant - Mixture Ratio
... The theoretical exhaust velocity of a given propellant chemistry is a function of the energy released per unit of propellant mass (specific energy) ... is that fuel-rich mixtures have lower molecular weight exhaust, which by reducing increases the ratio which is approximately equal to the theoretical ... Fuel-rich mixtures actually have lower theoretical exhaust velocities, because decreases as fast or faster than ...
Spacecraft Propulsion - Methods - Reaction Engines - Delta-v and Propellant
... in a straight line in free space would produce a net velocity change to the vehicle this number is termed 'delta-v' ... If the exhaust velocity is constant then the total of a vehicle can be calculated using the rocket equation, where M is the mass of propellant, P is the mass of the payload (including the rocket structure ... of mass P, the spacecraft needs to change its velocity by, and the rocket engine has exhaust velocity ve, then the mass M of reaction mass which is needed can be calculated using the rocket equation and the ...

### Famous quotes containing the word exhaust:

Only the really plain people know about love—the very fascinating ones try so hard to create an impression that they very soon exhaust their talents.
Katharine Hepburn (b. 1909)