Oberth effect is used in a "'powered flyby "'or "'Oberth maneuver "'where the application of an impulse, typically from the use of a rocket engine, close to a gravitational body ( where the gravity potential is low, and the speed is high ) can give much more change in kinetic energy and final speed ( i . e . higher specific energy ) than the same impulse applied further from the body for the same initial orbit.
12.
Where u is the mean flow velocity, \ beta = g K \ cos \ zeta, ( K is the earth pressure coefficient, \ zeta is the slope ), s _ g = g \ sin \ zeta, x is the channel downslope position and x _ d is the distance from the point of the mass release along the channel to the point where the flow hits the horizontal reference datum; E _ { pot } ^ p = \ beta h and E _ { pot } ^ g = s _ g ( x _ d-x ) are the pressure potential and gravity potential energies, respectively.
