https://www.miamiflightacademy.com//wp-content/uploads/2014/11/MiamiFlightAcademy.png00Miami Flight Academyhttps://www.miamiflightacademy.com//wp-content/uploads/2014/11/MiamiFlightAcademy.pngMiami Flight Academy2018-05-17 18:58:202018-05-17 18:58:20(Refer to figure 49.) What is the usable runway length for landing on runway 21 at PDX?