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8AC8: Helicopter rotor sprite (right-facing, 4 sub-pixel variants × 4 bytes).
Four pre-shifted 2-tile × 2-pixel variants (2-bit shift each). Only frame 4 (offset $0C) is used — selected by SPRITE_ROTOR_ATTRIBUTES ($0E) via the frame selection in jp_collision_dispatcher. Its two rows are the vertically swapped version of the helicopter body sprite's top 2 rows, providing the alternate blade position for the animation.
rotor-right-f1
sprite_helicopter_rotor_right 8AC8 DEFB $1E,$00 Frame 1
8ACA DEFB $03,$C0
rotor-right-f2
8ACC DEFB $07,$80 Frame 2
8ACE DEFB $00,$F0
rotor-right-f3
8AD0 DEFB $01,$E0 Frame 3
8AD2 DEFB $00,$3C
rotor-right-f4
8AD4 DEFB $00,$78 Frame 4
8AD6 DEFB $00,$0F
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