First off, the HQ9 is smaller than the S300.
As for fins, well could they not fold or be shortened or removed entirely? Surely you are smart enough to not need me to point this out?
The only critical factor is diameter. And it does not even necessarily have to be HQ16s or HQ9 missiles themselves that are quad packed, but it is certainly possible for missiles of those weight and size classes to be quad packed in the new UVLS, especially if they were designed form the offset for that.
That is where the PLAN SAM R&D budget has most likely gone to.
The PLAN made considerable sacrifices on VLS cell numbers making the UVLS as big as they have. It would be unwise to think they do not intend to take full advantage of all the carriage potential that gives them.
While main wings can be folded, controlling tail fins cannot due to being attached to a mechanism that is meant to turn on a different rotational axis for control purposes. The main wingspan of the 9M317ME missile (.82m), is on the tail fins, even if the main body wings are nearly reduced to nothing on the missile.
In a future design, you can try to reduce tail fin wingspan, maintain the same fin area with a longer chord, and compensate with TVC for control. This can explain the mystery missile spotted on the 054A thread.
That’s just not true at all. Please name a single example where for missiles of the same generation and from the same country, a smaller missile outranges a larger one.
Yes of course a bigger missile will mean more drag, but the increase in range from all the extra fuel the bigger volume allows cannot even come close to being offset but that small amount of extra drag that comes from making the missile bigger.
The 9M96E still outranges the 9M317ME, which is the latest, and modern version of the Shtil. Both are of the same generation, of the same country.
That extra sectional and surface drag combined isn't a small amount the faster you go.
PLAAF's experimental VLRAAM missile looks as narrow as any of its BVRAAMs can be, but is much longer, emphasizing that in order to increase propellant, you need to use up the length option before resorting to the diameter option. Increasing missile length without increasing diameter raises the missile's fineness ratio, which decreases the form drag.