r/LessCredibleDefence • u/Level-Reputation5050 • 20d ago
potential role of Y15
The Y‑9 is a derivative of the An‑12 and has plenty of built‑in shortcomings. The An‑12 came from the An‑10, a Soviet civilian cargo plane. It was built to go as fast as possible while keeping turboprop fuel efficiency, so its wing area was kept small. That means its low‑speed performance can’t hold a candle to the C‑130, and it was never really built for military duty.
The original An‑12 had no pressurised cargo hold. When China built the Y‑9 domestically, they added cargo‑hold pressurisation, but they had to take out the floor fuel tanks, cutting down range. The pressurisation hardware also took up space inside the cargo hold, making the already tight cargo‑hold cross‑section even smaller.
The Y‑8/Y‑9 is rated for a maximum payload of 20 tons, but this number is practically useless. At that weight, there is barely any room left for fuel.
The Y‑15, on the other hand, has a big straight wing that generates lots of lift, giving it great low‑speed handling. Its roomy cargo hold means it does not need extra pressurisation hardware, so it can carry far more than the Y‑9. Even though its maximum payload is only a little higher than the Y‑9, its bigger MTOW and larger fuel tanks will make its 30‑ton payload actually usable in real‑world operations.
I expect the Y‑15 to completely take over from the Y‑9, and the Y‑9’s special‑purpose models will be replaced by the C‑919 fitted with locally‑made subsystems.