The trial operation of the MPC-75 has begun, and the CF-34 engine has taken the lead and has been installed on the aircraft for trial operation tests, especially on the Lufthansa Intercity Airlines side, a total of 170 super orders If the CF-34 engine is purchased in the end, it will definitely be unbearable, but fortunately, the MTU company on the German side is very powerful, and it has also played a big role during this period. Pen "Fun" Pavilion www.biquge.info

MTU and the German government came forward together to directly persuade the senior management of Lufthansa's parent company with some policy concessions, and decided to use only the CF-34 engine on the first 30 aircraft, and the subsequent 140 aircraft will support domestic production, using the CG-2000 engine produced by MTU company, which also temporarily relieved everyone.

But at the same time of this relief, it also means that more huge pressure is coming, CG-2000 engine final stage of the air flight platform test, icing flight test and other projects are constantly advancing, some special flight conditions are not good to simulate, need to be tested in relevant professional institutions abroad, the United States will definitely not do, Rolls-Roy is even more cold, and finally Kravchenko, who is responsible for the entire follow-up test work of CG-2000, put forward a plan, The problem is solved by taking the launch to Russia for a final icing test.

But in any case, even if you are in a hurry to get on the fire, you have to complete the test items one by one, there is at least a one-year deadline in time, and the civil aviation company that originally planned to purchase the CG-2000 engine also knows that this engine has good performance, but it takes a period of waiting, and it is to sign the final delivery time of the engine to 94 years, as long as the engine can be delivered before this, there will be no loss of a large number of customers, and there is no need to worry about liquidated damages.

Unlike the CG-2000 engine, the MS-4 small-thrust and large-bypass turbofan engine provided to Embraer EMB-145 passenger aircraft has been smooth.

As long as the engine can meet the relevant airworthiness requirements, the final airworthiness certificate process has been completed, and the airworthiness certificate provided by the United Kingdom is still very golden, after all, the United Kingdom still has a civil aviation engine giant such as Rolls-Royce, and the countries that recognize the British aero engine airworthiness certificate in the world account for almost 90%.

The first batch of MS-4 engines because the final assembly line built in Brazil has not yet been officially operated, so it is still manufactured by the 331 factory and exported as a whole machine, and the first few EMB-145 passenger aircraft have also begun trial operation, and the encounter with the CG-2000 engine installed on the MPC-75 is different, this EMB-145 passenger aircraft only MS-4 one engine can be used, want other engines?

Sorry, we're not compatible!

In view of the background of the Northrop company behind Embraer, the EMB-145 passenger aircraft also quickly got the American airworthiness certificate, a large number of American orders are flooding the Embraer industry, although the aircraft is still in trial operation, but the production line has begun to increase the production of full horsepower, even with the 331 factory here is also working overtime to organize the production task, but also a joyful atmosphere.

After finalizing the MS-4 engine, except for leaving a group of technicians to track the small problems of the engine in the follow-up flight, the other technicians all turned to the development of the MZ-2200 engine, although the MS-4 turbofan engine and the MZ-2200 turboshaft engine are almost no similarities except for the same in the core aircraft.

However, the MS-4 engine is different from other turbofan engines, and the MS-4 also adopts the heirloom of United Aero Engines: gear transmission technology, plus the technicians on the 608 side do miscellaneous work, and they have also made turbo engines before the MS-4, so they are quite experienced in the design of reduction gears for turboshaft engines.

After concentrating the strength of the 608 Institute, the efficiency of the outbreak is not the same, the various subsystems of the engine have been designed and proofed, and the relevant component testing has also accelerated the progress, and the top and bottom are working hard to win the first completely independently designed turboshaft engine in the republic.

Although the situation on the aero engine side is very pleasantly surprised, it did not cause much turmoil when it came to Yang Hui, because at this time Yang Hui was participating in the test of the infrared navigation and laser targeting system developed by the photoelectric detection system company for lightning that year, and there was no other meaning in this test work, that is, to test the technical level developed by the team led by Yang Yue.

Although at the beginning of the whole project was born for the J-18 to develop an airborne built-in electro-optical navigation and targeting system, there were many setbacks along the way, and there were indeed many detours in the middle, but in the end the design work was completed by stumbling through.

The whole set of systems developed for the J-18 is built-in, so it is arranged according to the fixed space under the nose, so in order to ensure the size, it is a little rough, not as simple and beautiful as the pod type.

The whole system of the built-in version of the fuselage was installed on a special testing machine improved by Yunqi to carry out various tests during the test, and the night thermal infrared imaging function was tested in the previous period of testing, and the results obtained were quite usable, after all, with the basic industrial strength of the republic, the whole system itself was able to be built in the nineties.

The follow-up laser test work is still being tested, the first is to test the power of the laser generator and the laser penetration ability test under cloudy conditions, at this time, because of the inherent characteristics of the laser, the work in cloudy weather is not very satisfactory.

The normal operation in cloudy conditions is somewhat difficult, and it may be even more ugly for Yang Hui to test in hazy conditions before, so the words are still swallowed back, although laser guidance still has many inherent defects in principle, but its precision guidance ability still needs to be paid attention to, before 2010, satellite-guided precision guided bombs have not threatened the high-end market that laser-guided bombs firmly occupy.

Therefore, on the one hand, while choosing to vigorously develop satellite-guided bombs, considering that it will be difficult to have a reliable and accurate guided satellite system in the next two decades, the J-18 still chose to develop laser-guided bombs in parallel.

And the reason why this test can alarm Yang Hui here is because this time it is no longer a simple test of the entire optoelectronic system itself, but the first laser-guided bomb drop test.

The bombs used in this airdrop target test were not newly developed laser-guided bombs, but after the coordination of the Air Force, the unit that developed the 7721 laser-guided bombs in that year refurbished and produced a number of test samples of the 7721 laser-guided bombs left behind.

Speaking of this 7721 bomb, in fact, it is a copy of the "Paveway"1 that was first put into use in the United States during the Vietnam War, and the reason why the overall design of the "Paveroad" 1 was chosen to imitate the "Paveway"1 is that its structural characteristics and technology are relatively mature, and the actual combat use has also proved the successful basis of this design, and purely from the perspective of overall design, 7721 has basically reached the level of the early 70s in the West.

But even in this case, the Republic began to imitate this bomb in 77 years after a total of 7 years, intermittent financial support in 85 years before the start of live ammunition testing, I remember that the carrier aircraft to test this type of bomb at that time still used the old H-5 as a platform.

The 7721 guided bomb in the live-fire delivery test of that year successfully achieved laser guidance, the seeker and the missile control system basically met the design requirements, and the overall structural design and test data of most of the systems met the design requirements, so from the structural design and pure technical point of view, it can be considered that the 7721 has been successful on the whole.

But after all, this is the technology of the sixties and seventies, and its seeker accuracy and anti-jamming ability still have many deficiencies, and the hit accuracy of the 7721 in the test cannot meet the design index requirements, and the design of imitating the "Paveway" I has begun to lag behind in the late eighties, so the official statement is that this bomb is only a technical exploration and design team exercise, and the 7721 finally has no finalized equipment.

After a break of nearly ten years in the middle, it was not until the crisis of 96 that the army began to pick up various armament projects again, and precision-guided bombs were valued again, so in 97 they began to imitate the Russian KAB-500L laser-guided bomb that came to China with the Su-27, 7721 is a laser-guided bomb of the United States, and the Russian KAB-500L imitated in 97 is the Soviet-made route, In addition to the same principle, the design of the two bombs is very different in all aspects.

Therefore, the scientific research team that spent nearly ten years to imitate the experience and training accumulated by 7721 with a lot of energy and cost has long been lost in the middle ten years, which has to be said to be a kind of sadness.

On the one hand, the 7721 was indeed backward in technology, and on the other hand, the republic did not have an urgent need for this thing at that time, so this road was cut off.

But now this plane is different, 7721 in 85 years for the first bomb target test, followed by several years of various tests before finally dismounting, so when dismounted it was relatively close to the beginning of the J-18 project, and J-18 clearly proposed to use precision-guided bombs as the main means of ground attack, so the 7721 project that had just been dismounted was picked up again.

At this time, the requirements are different, first of all, on the basis of 7721 to carry out large-scale improvements to the seeker, requiring the new seeker to reach the level of the second generation of laser-guided bombs, until now 93 years, although the final research and development of the new generation of seeker has not been completed, but at least in technology has been continued and inherited, the scientific research and design team can continue to maintain, and the military and AVIC Southwest have taken out a small part of the J-18 project to support, so it is passable.

In this test of the airborne laser targeting system, a few sample bombs of the 7721 project were used there, and the bomb was well maintained in all aspects, and it could be put into test after a little test and refurbishment, anyway, this test was not a guided bomb, but a test of the laser guidance system, so the accuracy of the bomb was not high, and the 7721 was also acceptable.

Now, a sample bomb was hung under Yun Qi's wing, and it was flying towards the predetermined shooting range where Yang Hui was. (To be continued.) )