2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/9054We present numerical simulations of the interaction between a collimated, bipolar ``pulse'' ejected from a star and a continuous wind ejected from a stellar companion. We explore the characteristics of the predicted H$α$ intensity maps by varying selected input parameters. We find that the asymmetry (in size and strength) between the two lobes of the proto-planetary nebula OH 231.8+4.2 is reproduced in this scenario if the wind ejected by the companion star has a strong latitude dependence.8 pages, 7 figures, accepted for publication by RevMexAAAstrophysicstext