The Volatol from the Doomsday Heist update.
Vehicles.ide:
volatol, volatol, plane, VOLATOL, VOLATOL, VEH@HELICOPTER, NULL, 100, 999, 0.05, 0.05, 0.3,4, 1.5 ,0, -
Handling.dat:
VOLATOL 12000.0 10.0 75 0.0 0.0 -0.5 0.0 1 2.00 4.0 40.0 0.4 0.60 0.7 35.0 0.65 0.60 8.0 0.10 0.5 5.0 1.3 1.3 0.05 -0.14 0.0 0.5 1.2 0.8 0.8 1.5 3.0 45000 06004000 00400000 13

Use https://gtaforums.com/topic/955449-iv-zolikapatch/ to unlock the 4 livery limit