Increasing the thrust in the stationary mode-where power is fixed by thermodynamic constraints, is only possible by sacrificing exhaust velocity.
32.
This plasma is accelerated out into space by the Lorentz force at a high exhaust velocity ( 10 to 100 km / s ).
33.
This is higher than the " actual " exhaust velocity because the mass of the combustion air is not being accounted for.
34.
(Note that different symbols are sometimes used; for example, " c " is also sometimes seen for exhaust velocity.
35.
Rocket motors maximise thrust and exhaust velocity by using convergent-divergent nozzles with very large area ratios and therefore extremely high pressure ratios.
36.
Fission-based thermal rocket concepts produce lower exhaust velocities than the electric and plasma concepts described below, and are therefore less attractive solutions.
37.
The formula for air-breathing engines moving at speed v with an exhaust velocity v _ e, and neglecting fuel flow, is:
38.
There is a mission-dependent limited optimal exhaust velocity and specific impulse for any thruster constrained by a limited amount of onboard spacecraft power.
39.
For air-breathing jet engines, particularly turbofans, the actual exhaust velocity and the effective exhaust velocity are different by orders of magnitude.
40.
For air-breathing jet engines, particularly turbofans, the actual exhaust velocity and the effective exhaust velocity are different by orders of magnitude.
