Weight of Aircraft at End of Loiter Phase is considered for the Preliminary Endurance Calculation. For the calculation of preliminary endurance, the loiter phase is considered. And is denoted by WL,end. Weight of Aircraft at End of Loiter Phase is usually measured using the Kilogram for Weight. Note that the value of Weight of Aircraft at End of Loiter Phase is always positive. Typically, the value of Weight of Aircraft at End of Loiter Phase is greater than 0.