Most figure skaters enter the flip jump with an outside three turn and then "pick" with the free toe. The three turn done before the flip jump must be done in a straight line.
A flip is generally entered from a LFO3 or mohawk. If a LFO3 is used, the turn must be very flat so the skater is not gliding on a deep curve before picking. A straight preparatory sequence contributes to control of the jump,