Вместо ХХ поставить порядковый номер сима.

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[fltsim.XX]
title=Mil Mi6A UTair RA-21046
sim=Mi6zh
model=GVF
panel=
sound=
texture=UTA21046
checklists=
kb_checklists=
kb_reference=
atc_id=21046
atc_airline=UTA
atc_flight_number=21046
ui_manufacturer=MIL_zh
prop_anim_ratio=-1.33         /////-1.52
ui_type=Mi6
ui_variation=UTair RA-21046
visual_damage=1 
description=Painted by Epsilon63
atc_heavy=1
