तस्य द्विरथोत्तरा वृद्धिरैकविंशतिरथादिति ॥ कZ_१०.५.१५ ॥
tasya dvirathottarā vṛddhir aikaviṃśatirathād iti
Bei dieser (Standardformation) erfolgt die Steigerung, indem jeweils zwei Wagen hinzugefügt werden — beginnend bei einundzwanzig Wagen.
Even-number increments preserve bilateral symmetry (left/right) and keep wings balanced while scaling the formation.
A minimum viable baseline size for this formation family, from which standardized expansions are authorized.