Comments by "Solo Renegade" (@SoloRenegade) on "Sandboxx" channel.

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  36.  @dammy  "I'm talking about US program, not PLA's." then your argument is even WORSE. The US has no carriers to shoot hypersonics at. We can sink enemy ships with ease using a variety of other better weapons. The US is not investing heavily in hypersonic glide weapons as this video pointed out. the US is the world leader in all forms of hypersonic research, and they understood back in teh cold war the limitations and economics of hypersonics. everyone else is still playing catchup. So, since the US has no such weapons, as we have no need for them and they don't make sense strategically nor tactically, we are going to discuss the PLA's hypersonics as the use case you KEEP describing is that of China attacking a US carrier. and since china actually tested one of these for real, we have actual understanding of what it can and cannot do right now. The Chinese test missed a known stationary target by many miles. Two, as hypersonics descend into thicker air near the surface (where carriers are), they can no longer achieve hypersonic speeds due to air resistance. Look at the max speed of different aircraft at sea level vs at 40k ft. Many jet fighters can't even go supersonic at see level due to air density. Gliders have a fixed energy budget to use to reach their target. If you bleed off too much enroute, you wont have the same range as a missile that has nothing to dodge. Also, at mach 5 to mach 10, the exterior frictional heating will destroy sensors, antennae, etc. (look up the X-15 fastest flights if you don't beleive me). and so how do you plan to communicate with this thing in flight? The plasma build up during reentry of a space capsule can happen to these hypersonics too, blocking communications as well. How do they track moving targets after they've been fired? Keep in mind they are firing beyond line of sight, and so early the only way they can be guided is to be told by ground assets where the target is and where teh interceptor missiles are. These things can be detected and tracked from the point of launch, giving time for even a large ship to maneuver enough. And since the missile will be supersonic at best by the time it reaches the target, the majority of the damage will have to be done by it's rather small conventional warhead. Also, don't forget that the US has demonstrated multiple weapon systems capable of intercepting ICBMs, satellites, and objects moving at hypersonic velocities in live tests. These hypersonics may be fast, but they are still much slower than a SpaceX Falcon 9 rocket.
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  41.  @johnsullivan8673  " It's about efficiency at an expanded flight envelope. Having a turboJET that may or may not be able to operate as a ramjet ala J-58 means the flight optimization curve (really, fuel efficiency - which translates into speed<survivability>/combat radius/endurance) for this platform can be widened." false. you don't need three engines to do that. the Blackbird only needed two engines to do that. adding the fuel and weight of a third engines REDUCES the range and performance of teh aircraft. the fuel tanks and engine volume could have gone to fuel for the other two engines for extreme range. but clearly two engines couldn't provide sufficient thrust for that much weight alone. A low-bypass tubofan/turbojet is not going to act as a ramjet. the Blackbird had a turbojet engine with a HIGH bypass for the ramjet. you cannot use a ramjet with a turbofan as the fan blades block airflow to the ramjet. clearly you don't understand such things. this chinese prototype doesn't fly fast enough to be survivable by relying upon speed. adding a third engine KILLS efficiency due to reduced total fuel volume per engine and added weight. if they wanted high efficiency engines or ramjet engines, they could have done that using only two engines. but they lack the performance using only two. thus the third engine to make up for lack of thrust to achieve performance goals. China's engine as are crap, even Russia knows this to be true. China is still trying to copy Russia's jet engines, and Russia has no engine remotely comparable the F-35's engine. China has no engines REMOTELY comparable to what the F-35 has. they hope to get there someday, but they are decades from getting there. in the meantime, they have to use their garbage copies of crap russian engines instead. it's even well known that the J-20 has underpowered engines and suffers for it, and it's why the J-35 also has two engines instead of one.
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