Bismillah ir Rahman ar Raheem
As Oscar has said, the problem with the Z-10 is the power-to-weight ratio.
CAIC Z-10:
16,000 lbs. / 2700 shp. = @ 6 lbs./shp
20,000 ft. ceiling claimed (highly dubious)
AH1F Modernized:
10,000 lbs. / 1,800 shp. = @ 5.5 lbs./shp
12,000+ ft. ceiling
TAI T-129...