Aircraft Classification Library

The Aircraft Approach Category (AAC) groups aircraft by approach speed (V_REF / 1.3 V_SO): A < 91 kt, B 91–120 kt, C 121–140 kt, D 141–165 kt, E ≥ 166 kt. It drives runway-side standards — RSA, ROFA, RPZ, and separations.

The Airplane Design Group (ADG) groups aircraft by wingspan and tail height — the most demanding of the two governs. It drives runway and taxiway width-based standards.

The Taxiway Design Group (TDG) groups aircraft by main gear width (MGW) and cockpit-to-main-gear distance (CMG) per Figure 4-2. It drives taxiway fillet geometry and taxiway/taxilane widths.

Wingspan is the maximum span including winglets where fitted. Tail height is measured to the highest point of the empennage at maximum gross weight. CMG is measured from the pilot eye position to the main gear axle centerline. MGW is the outer-to-outer distance across the main gear tires.

Approach speed values are published reference speeds at maximum certificated landing weight; speed unit is kt.

Fixed per-aircraft values (wingspan, tail height, gear geometry, MGTOW, approach speed) come from the FAA Aircraft Characteristics Database. Planning dimensions that vary with approach condition (RSA, ROFA, RPZ, separations) live in the dedicated reference tools — open them from a selected aircraft’s dossier links. Verify all values against current FAA publications before use in official Airport Layout Plans or regulatory submittals.