Orbit cranking a.k.a. orbit pumping is a process that changes the plane of an orbit while keeping the altitude the same. Orbit cranking requires a lot of propellant and is not a very efficient method to get into a desired orbit.

The required delta-v for orbit cranking is given in the equation below.

del_v = 2 Vcsin(alpha/2)

Where Vc is the velocity required to maintain the current altitude.

Alpha is the desired change in orbital inclination (in radians, not degrees)

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