तस्य द्विरथोत्तरा वृद्धिरैकविंशतिरथादिति ॥ कZ_१०.५.१५ ॥
tasya dvirathottarā vṛddhir aikaviṃśatirathād iti
ສໍາລັບ (ຮູບແບບ) ມາດຕະຖານນັ້ນ ການເພີ່ມຂຶ້ນແມ່ນເພີ່ມລົດຮົບຄັ້ງລະ 2 ຄັນ—ເລີ່ມຈາກ 21 ຄັນ.
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.