"Qin Feng, you are really a good comrade." Donald said, "Do you have any other suggestions?" ”

Qin Feng's suggestion just now made them very excited, and now, looking forward to Qin Feng's new suggestions, after all, Qin Feng has been abroad many times and has seen the world.

Suggestion?

Qin Feng remembered again, it is not easy to say that it is exported to Pakistan, they have too many requirements, when they first promoted the Jian-7M, the other party has inspected it several times, and finally they flew to Pakistan to engage in confrontation, just like that, the other party placed an order, and also put forward a lot of improvement requirements.

As for the major changes proposed this time, there are even more numerous.

Then, if the Pakistani side wants to buy its own Jianjiao VII, the other side may also make a lot of demands.

What will they ask for?

Qin Feng could easily think of it.

"Our Jianjiao-7 was mapped and mapped on the basis of the Soviets' training aircraft, right?" Qin Feng asked.

The domestic industrial base is placed here, so it can only be surveying and mapping.

In fact, to engage in the two-seater type, is to free up the space behind the single-seat fighter, under normal circumstances, there are fuel tanks, and the equipment is placed in front of the pilot, after freeing up, the space for the second pilot is installed, and it is fully equipped.

It is not difficult to say, but if the country wants to change it directly on the basis of the MiG-21, it will not work, it can only have a prototype, and then copy the cat and the tiger, survey and map the imitation, and make it out of it.

If you do it like this, it is similar to the prototype, and the MiG-21 training aircraft has great flaws, Qin Feng once repeatedly mentioned it when he was reading Western literature, and he laughed at it.

What flaws?

That's the cockpit arrangement of the trainer aircraft.

The general training aircraft must be low in the front and high in the rear, so that the pilots in the front and rear have a good field of vision, the front is the position of the flight student, the back is the position of the flight instructor, the instructor can clearly observe the situation in front at any time, especially when landing, this observation is very important, once the pilot's attitude is not right, even the instructor behind has to take over the command, and the aircraft will land down steadily.

However, the Soviets' planes are not like this, not only the MiG-21, but also the former Jianjiao 5 and Jianjiao 6 of their own side, all of which are like this, the cockpit is flat, and the flight instructor in the back does not have any vision, he can only see the sides, not the front.

On the Jianjiao 5 and Jianjiao 6, the impact is not great, after all, the take-off and landing speed of these two aircraft is low, leaving enough reaction time for the pilot, but the Jian-7 is different.

In order to achieve the purpose of flying to Mach 2 with a small thrust engine, J-7 is designed to be completely high-altitude and high-speed, and its take-off and landing speed is very high, that is to say, the speed of take-off and landing is very fast, and the speed is slow and stalled, so that when it comes down at high speed, it is very dangerous to land.

The Soviets, of course, thought of this danger, and they adopted the simplest and most crude solution, which was to add a periscope to the instructors in the back, and when the MiG-21 trainer came down, it could be seen that above the canopy of the cockpit behind, a device protruded, like the tentacles of the plane, and that thing was the periscope of the plane.

Can the field of view of the periscope be compared to the field of view of direct view?

Now, Qin Feng thought of this biggest problem, as a training aircraft, there are no necessary conditions that a training aircraft should have!

"Yes, we can only do mapping now." Donald said.

They used to produce the J-6, and they didn't have any experience in the J-7, if they had done the J-7 before, they had accumulated experience, maybe they would dare to do it themselves, and now, it can only be surveying and mapping.

"It would have been great if we could have raised the cockpit in the back a little bit to give the instructor in the back a better view." Qin Feng said his thoughts.

Of course, his idea could only make the people present even more embarrassed.

yes, who doesn't know? If it is a training aircraft, how important it is for the instructor in the rear cabin to have a good vision, but they don't have that ability!

"It's not easy, in this case, it's equivalent to redesigning the entire front fuselage." Tu Lao saw it more clearly, he was familiar with the structure of the J-7, and only raised the cockpit behind? Of course not, that would lead to the disharmony of the aircraft, and at the same time, what to do later?

Enlarged back? If you change it this way, the workload will be even greater.

So, raising the cockpit in the back, it's hard to say, in comparison, it's better to lower the cockpit in front!

In this way, the entire rear fuselage remains unchanged, as long as the front cockpit is lowered, the field of view of the rear cockpit can be effectively improved, which meets the needs of the trainer aircraft.

But what, lowering the cockpit in front, what to do with the nose?

The pilot's space is limited, and there must be air intakes on both sides, as well as various equipment, so the nose of the aircraft must be overhauled.

Since it is going to be changed, it is better to be the same as your current J-7 CP plan, air intake on both sides, anyway, it is also to change the nose, simply change it together, air intake on both sides, the nose will be vacant, and the same as the strong five, let the nose droop more, so that the nose can fully let the cockpit in front of it sink, and the cockpit in the back will form the shape of a ladder, which can meet the needs of instructors and flight students to have a good vision.

However, how could they complete such a major operation?

Their own J-7 CP plan, you still have to work hard to tackle key problems, Lao Tang's technology is even worse, and now the time is also tight, but he has made a military order in front of his superiors, so that this aircraft will make its first flight next summer.

Qin Feng looked at everyone's expressions and knew that although his proposal was good, but now, it was really a little ahead, and it would be good to copy the original MiG-21 training aircraft first.

As for this plan, I'm afraid it will have to come later, and when the time is ripe, I can come up with it.

Of course, Qin Feng doesn't know now, this plan has really been made out in the 011 base, but the air intake on both sides has been replaced by a two-rib air intake, and it also comes with a bulge, this latest training aircraft, known as the Mountain Eagle, has also become Guihang's fist product, in addition to training, it can also fight, and it is completely the most cost-effective weapon in poor countries.

Even because of the good technical indicators, it was selected by the Navy and became the training aircraft of the Navy's aircraft carrier carrier-based aircraft.

This third-tier aviation company in the ravine has also broken out of its own world, as long as there is struggle, there will be hope!

And now, it is only the 80s, they are in the struggle to break out of the cocoon and be reborn, and the history of Guihang people is slowly being written.