Chapter 1328 Feedback from the Navy


    "Americans themselves don''t even know..."


    This statement made Zheng Liangqun suddenly excited—


    It''s not just the simple excitement of having a chance to surpass the opponent, but it''s also mixed with some...satisfaction of personal voyeurism.


    "Then...when will the results be available?"


    Although reason told him that such a thing that seemed quite complicated at first glance should take a while, reason did not work in all situations.


    Especially when there is such a special relationship between two people.


    All in all, it was very urgent.


    I can’t wait to see what the Americans have up their sleeves (pants) right away.


    Chang Haonan had just finished arranging the work at this moment. He glanced at Zheng Liangqun, who was full of enthusiasm, and replied:


    "This mainly depends on the research level of Americans..."


    As he spoke, he checked the handover document on the desktop again, and then signed:


    "If the design itself complies with the aerodynamic principles under hypersonic conditions, and the flight test failure is due to substandard production quality or other problems, then it will only take a dozen or even fewer rounds of testing to end."


    "If there is something wrong with the design of the scramjet engine... it''s hard to say. We need to first carry out calculations based on the theory of complex heating tube flow, verify the effects of mass addition, heat addition and wall friction on the air flow, and then calculate Each abnormal point is tested to verify the adverse effects they produce under flight conditions..."


    "If you''re lucky, you might be able to find the key problem right away. If you''re not lucky, you might not be able to determine the result for several months..."


    In fact, these words are quite Versailles.


    After all, even the Americans themselves, who have almost all first-hand test information, only said that they would set up two separate fault tree analysis teams and strive to provide investigation conclusions before the end of 2007.


    That’s a window of about eight months.


    But when it came to Chang Haonan, it only took a few months due to "bad luck".


    However, Zheng Liangqun was obviously unable to think things through in such a short time, and just showed a look that seemed to understand:


    "You can analyze so many things with just such a small fragment?"


    Obviously, he regarded the variables mentioned by Chang Haonan as different contents.


    "Well…"


    The latter helplessly held up his forehead:


    "Actually, these are the same thing, but the intermediate processes need to be verified separately... In short, it happens that the wind tunnel has not been used very frequently in recent times, so I will do it as soon as possible."


    After finishing speaking, he glanced outside the window at the wind tunnels winding like giant dragons:


    "And to be honest, although I came up with the idea of ??using nuclear submarines to monitor flight data, being able to directly retrieve part of the wreckage is still such a critical part... It was indeed such a coincidence that we didn''t have time to make any preparations."


    Speaking of this matter, Zheng Liangqun instantly regained his energy:


    "Hey... not only you, but also the navy and the superior leaders didn''t expect it."


    At this point, he suddenly stopped talking and looked around.


    Obviously, the following content cannot be heard by too many people even in the already highly confidential Huairou Science City.


    Chang Haonan understood immediately and took Zheng Liangqun to his office in Science City.


    The staff of the High Temperature Gas Dynamics Laboratory are now close to proficiency in the application of the JF14 wind tunnel. Unless the test subjects are particularly important or have never been conducted before, they can be entrusted to Jiang Zonglin and others.


    Moreover, Chang Haonan was indeed a little curious about what happened during the nearly one month since the fleet set sail.


    "I heard from comrades in the Navy that they inadvertently conducted an unprecedented submarine cooperation..."


    After closing the door and taking a seat, Zheng Liangqun spoke again:


    "After detecting the disintegration of the X51A, two American destroyers and an aircraft immediately turned and rushed to the sea area where the incident occurred. Especially since the aircraft was on the same platform as the P3C, the formation commander thought that a submarine had been discovered. We boarded No. 171 to desperately delay, while the Long March 9 sailed underwater for several hours at a high speed of nearly 20 knots, gaining a long window period..."


    In fact, the situation at the scene was not very thrilling. After the 171 Yecheng ship left the fleet, it quickly judged from the flight movements of the opponent''s aircraft that it was not an anti-submarine patrol aircraft. However, due to the range of the aircraft, the Long March 9 There is actually plenty of time to complete the search and salvage.


    But now we are not writing a mission report. As the narrator, Zheng Liangqun inevitably wants to describe the plot more excitingly.


    Of course, Chang Haonan also knew that this part of the content should not be believed in its entirety, and he was interested in other places and was not so easily affected by adding fuel and jealousy. "After the hypersonic aircraft disintegrates, it will scatter over a large area. Even if there is a window period of several hours, it will be difficult to conduct a complete search, right?"


    "And the size of that thing is not small, and it is inconvenient for a submarine to float for a long time in the sensitive area where the accident occurred. How was it salvaged?"


    “…”


    Later, Zheng Liangqun spent about twenty minutes explaining to Chang Haonan how the captain determined the location of the suspicious echo signal by detonating a small mine, and how he used UUV and frogmen to transfer the debris back into the submarine.


    The whole process was quite exciting, and if it weren''t for the confidentiality factor, it might have been enough to make several submarine-themed movie blockbusters.


    "The Long March 9 did a really good job this time. It not only completed the mission successfully, but also proved that the nuclear submarine force has great potential to carry out non-combat operations in addition to strategic deterrence... It''s just that the 09IV is a strategic nuclear submarine after all, so it''s okay now. If we enter duty status in the future, it will be impossible to withdraw the missiles every time..."


    For Zheng Liangqun, an Air Force officer, to be able to praise him like this, it seems that the military''s internal evaluation of this operation should be very high.


    It may even affect the distribution pattern of military resources.


    Moreover, Chang Haonan also heard the hidden meaning in the other party''s words:


    "So the Navy hopes... to give attack nuclear submarines more functionality?"


    Although he has not directly participated in the research and development of underwater equipment, the new generation of nuclear submarines is inseparable from his series of achievements at the theoretical and engineering levels.


    In particular, the package of cooperation projects with nuclear industry groups in the past few years has effectively improved China''s basic research level in the field of nuclear energy utilization.


    There is no mistake in every song, one post, one content, one 6 one, one book, one book, take a look!


    Therefore, Chang Haonan is by no means ignorant of these.


    09III is a quite pure attack nuclear submarine, and is not equipped with any tricks other than torpedo launch tubes -


    A somewhat counter-intuitive fact is that for submarines, concentrating all weapons in the bow torpedo room is the most space-saving design solution. In addition, other equipment, including ship-borne vertical launch systems, will weaken conventional weapons. The loadout of the weapon.


    This is often particularly important for a small model.


    "Well...it''s not just about versatility either..."


    Zheng Liangqun replied:


    "According to the feedback from this mission and the report submitted by the crew team, the functionality can be compensated by external UUV and other equipment. What the submarine itself needs more is a higher silent underwater speed and stronger Underwater mobility, and preferably some communication capabilities..."


    At the end of the sentence, he even laughed out loud:


    "Of course, some of the content here may not be realistic, especially the underwater communication part, but it is always a direction to work towards... Also, if you are interested in the details, I can ask the Navy Headquarters to send you a copy of the report. …”


    Chang Haonan still has two big projects to be responsible for at the moment. He is not ready to get involved in new fields for the time being. He just waved his hand and answered casually:


    "Actually, underwater communication...especially medium and short distance communication is not particularly unrealistic. In comparison, the speed aspect is more troublesome."


    Zheng Liangqun raised his eyebrows when he heard this, and secretly began to concentrate, preparing to write down what the other party said next.


    "Based on the current theory of fluid mechanics, unless a completely new form of propulsion is used, it will be difficult to make any significant breakthrough in terms of silent speed..."


    "Not even pump jet propellers?"


    he asked with some confusion.


    Chang Haonan shook his head and organized his words slightly:


    "Actually, compared to traditional large side-blade propellers, pump-jet propulsion has more advantages in the medium and low speed range... Due to the reduction of propulsion efficiency in high-speed environments, higher speeds and turbine power are often required, which is likely to outweigh the gains. , you see that the current models using pump jet propulsion are indeed not good at speed...and it is easy to calculate..."


    Seeing that he was about to make another big move, Zheng Liangqun quickly stopped him:


    "I believe in this conclusion and the calculation is unnecessary."


    Then quickly changed the subject:


    "So, do you have any technical ideas?"


    "That''s not the case for the time being..."


    Although he said that, Zheng Liangqun noticed that the other party''s eyes moved slightly just now.


    I''m afraid it''s not that I don''t have any ideas, it''s just that I''m not mature enough.


    (End of chapter)