FLAP OPTIMUM and RTG OPTIMUM search Flaps 1/5/10/15/25 and TO/TO-1/TO-2 for the lowest legal setting. Only Flaps 5 / TO(26K) have a real FCOM field/climb chart — every other flap or thrust rating is an estimate scaled from that chart (V-speed ratios for flap, thrust ratio for rating), not an FCOM-published number. INTX/I-C are display-only — not wired into the calculation (no taxiway-intersection or Improved Climb data in the dataset).