Anyway your number are a bit off Submarine speed is rarely goes above 30 knot=0.92km/sec and the rocket speed is not Mach 0.85 but Mach 0.95=(1163km/hr)/60=19.5km/sec So distance of 50km can be reached in 2-1/2 sec.
So the submarine move about 2.3km which standard range of torpedo with 50 knot speed and 1 hr endurance
I
the first generation missile, CY-1 some years ago, but this analysis observes that CY-1 “obviously could not meet the Chinese Navy’s requirements.” The article does not claim definitive information on the characteristics of the Yu-8, but offers the following projections. The missile is expected to be about five meters in length, and to weigh less than 700 kilograms. The range is said to be approximately thirty kilometers at a speed of Mach .9 to .95.
The torpedo part of the weapon is estimated to be 324 millimeters in width and capable of detection (both passive and active) over 1.1 to 2.5 kilometers.
Ohio class sub
Type: / (hull design SCB-304)
Displacement:
- 16,764 tonnes (16,499 long tons) surfaced
- 18,750 tonnes (18,450 long tons) submerged
Length: 560 ft (170 m)
Beam: 42 ft (13 m)
Draft: 35.5 ft (10.8 m) maximum
Propulsion:
- 2× geared ; 60,000 shp (45 MW) auxiliary diesel
- 1× 325 hp (242 kW) auxiliary motor
- 1 shaft with seven-bladed screw
Speed:
- 12 knots (22 km/h; 14 mph) surfaced
- 20 knots (37 km/h; 23 mph) submerged (official)
- 25 knots (46 km/h; 29 mph) submerged (reported)
Not sure if your post about the Shkval and this one which seems to be about the Yu-8 are related? They seem conflated and is only tangentially related to the Type 056.
The Yu-8 is basically analogous to VL-ASROC with more range, not sure what all the fuss is about! Once sonar identifies and locates the sub, the missile is fired into it's path, it's approach is undetected by the sub as it's flying and even if the sub 'heard' the launch it won't be able to tell if it's a Yu-8 or some other missile, therefore the sub, won't be betraying itself by going flank speed. Once the Yu-8's torpedo portion makes splash down (hopefully on top of the sub!) it's down to how deep the sub is and how quickly the sub captain reacts (depth conferring greater reaction time since the torpedo is always coming from the surface) as to whether it survives (usual mix of hiding, decoys or simply trying to out run the torpedo) vs a lucky shot the torpedo ends up very close to the sub and is hidden in the baffles which will pretty much seals the sub's fate. Whether the Type 056 has the Yu-8 or a similar slant launched system, tactically it operates in the same manner.
The Type 056 only has a helipad so won't always have a helicopter (cue Iron Man on how the type 056 should have had a hangar
) so the Yu-8 or similar system confers it a stand-off sub attack capability.
The Shkval on the other hand will be heard as soon as it splashes into the water and fires up, it doesn't do Mach 0.95 rather maxes out at ~200 knots and I believe is intended to arm subs not aircraft or surface vessels. Basically it can be used to "out draw" the opposition in a shoot out, sub launches wired guided torpedoes, is detected, opposition sub counters by launching Shkval to take it out before the torpedoes arrives, using its 4x speed advantage and shouting about it to deter the other sub!
Finally there's little need to quote National Interest all their articles come from the same viewpoint(s) "foreign weapons are crap and the US will obliterate all foes" or "foreign weapons copied from the US means the need to spend more defence dollars to continue to obliterate our foes" which is why its radio silence on the Chinese EM gun at the moment because it breaks the narrative(s), not saying it's a sputnik moment, but certainly a wake up and smell the coffee one!
