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A **skew flip turnover** is a maneuver in which an aircraft or spacecraft accelerates to a certain point, flips over (skew flip) and begins to accelerate in the opposite direction. Weaker spacecraft will accelerate up to a certain velocity, coast for a while, then decelerate to rest.

If the desired acceleration of the spacecraft is known (generally one g or 9.81 m/s²) and the transit time is to be calculated, the equation is

where

*T*= time (seconds)*D*= distance (m)*A*= acceleration (m/s2)- 1 g = 9.81 m/s²

The skew flip turnover was described in Robert A. Heinlein's book *Have Space Suit—Will Travel*.

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