re: PLAN Type 052 Class Destroyer
i guess it was on cdf then where i mentioned the images of land based hq9 being launched. the missile gets ejected five times its length into the air, then the rocket motor gets ignited. we're talking at least 30 meters clearance over the launch deck and easely over 20 meters of clearance over tallest part of neighbouring superstructures. I watched s300 missiles get launched and i must say it seems as if they don't get ejected as high up as hq9, it seems their engine fires at around 2,5 times their length into the air. Incidentally, s300v missiles get fired into the air a lot, more or less five times their length. It seems the makers of hq9 went that route instead...
as for quad packing - while pl12 with a booster would be a terrific asset - i just don't see that being used anytime soon. 3,3 meter long containerss have to be there for a purpose, any only purpose i can think of for such a fairly short but fat container is to hold four relatively short and probably boosterless missiles. Probably hot launched if that is more efficient, as there is certainly enough area for that and the exhaust in 0.85 * 0.85 meter container.
And with such a missile available, i don't see another, fairly similar system by role if not by range, to be developed soon for the 7 meter containers. It may come eventually, of course, but i wouldn't hold my breath over its perceived urgency for PLAN.
Plus, pl12 means heavier missile and booster means additional weight on top of that, requiring perhaps too demanding of a booster for the exhaust in the container. Even if four such missiles could be packed within 0.6 by 0.6 meter square, the remaining area for exhaust may not be enough to handle firing of a 300+ kg missile.