Chapter 691: David people like it

If it is a valuable asset to accumulate a large amount of data in the aerodynamic layout, then the flight control rate is even more impressive.
If you want to tame a duck-type fighter, you must go to digital telex.
Ordinary airplanes are operated by hydraulic pressure. The air density of low altitude and high altitude are different, and the amount of control stick is different. All of these require pilot’s skills. If you use fly-by-wire control, you can modify the control rate to achieve the same level. .
For another example, the engine fuels the throttle, the power increases, and the aircraft will climb because of its higher lift in addition to speeding up.
However, if you control by wire, add gas, you will only accelerate, not climb. This is the difference.
It can be said that the fly-by-wire control greatly simplifies the operation of the aircraft and reduces the difficulty of the pilot, but at the same time, this control method requires a thorough understanding of the flight control rate.
Even if they have an F-16, use a digital telex, and can obtain the source code, that will not work, because the aircraft is different, the duck layout and the normal layout are not comparable, and the control rate must be re-studied.
Historically, the Gripen fighter developed by a certain country dropped its prototype because of a problem with its control rate. It is said that they only used the Eagle Country’s flight control to modify it and use it. Hell if nothing happens.
The duck layout and the duck layout, the flight control rate are similar, and only need to be modified in detail.
Does Han State have digital telex technology?
Of course there is. Take a look at the current F-14. In the vertical axis, the pitch operation has already adopted digital telex. This is an example.
Upon hearing this, they were completely moved.
Of course, they will not immediately put forward ideas for further cooperation, they must go back to discuss, what price they are willing to pay, the Davidians are the most shrewd.
They circled the wooden model and studied it back and forth. Even a small detail would be analyzed for a long time, completely forgetting that they were watching Super Seven.
Qin Guan, Tu Lao and others were watching. At this time, Tu Lao admired Qin Guan, and only relying on a wooden model can fool these Davidic people!
"This duck wing is not too far away from the main wing." Rafael continued.
The layman watched the excitement, and the expert watched the doorway. When the other party said that, Qin Guan knew that he must be from a pneumatic background, and immediately asked the most professional question.
In the duck layout, the effect is very different according to the distance between the duck wing and the main wing. This is divided into short-distance coupling, medium-distance coupling and long-distance coupling.
Close coupling, the rear of the canard wing and the front of the main wing almost overlap, which is represented by the gust of the chicken country. This layout uses the advantageous interference caused by the detachment vortex of the front wing through the wing to delay After the wing stalls, a larger lift at a high angle of attack can be obtained, and the stability is increased in the post-stall flight state.
Therefore, through the close coupling layout to match the wings of the delta wing, the take-off and landing distance can be reduced, the maneuverability can be increased, and the overall size of the aircraft can be reduced, weight and cost can be reduced.
However, it has higher resistance in supersonic flight. For the J-9, the main purpose is to intercept at supersonic speed, which is of course impossible to use.
Long-distance coupling, the distance between the canard and the main wing is quite far, the mutual interference is much simpler, and the matching of the parameters of each wing is relatively easy.
Therefore, the main function of this canard is to generate a lift. The main wing behind can no longer use the vortex generated by the canard. To put it simply, it is a control surface. The most typical one is the "Typhoon" fighter. .
And the duck-style layout of Han State, the front and rear distances are not far or close, there is no overlap, and there is no eight-pole failure. This is the middle distance coupling, which is of course the result of comprehensive consideration.
But now, of course, I can't tell these secrets with the former David.
"Sorry, these have involved our secrets." Qin Guan said: "Now, let's take a look at our F-14 fighter. It is the protagonist."
A group of people from the Kingdom of David looked at the wooden prototype with reluctance. At this time, it had been covered with canvas again.
"The biggest feature of our F-14 is its low cost and moderate performance. In short, it is a low-cost multifunctional fighter." Coming to the front of Super Seven, Qin Guan began to introduce it.
In fact, looking at it now, this aircraft is definitely a good product. It uses a normal aerodynamic layout, plus side wing, which effectively improves the performance at high angles of attack. The bulge of the two intakes is also the most It can bluff people, the lines of the entire plane are smooth, reflecting the good manufacturing craftsmanship, and the neat skin represents that it has broken away from the crude craftsmanship of Xiong Country.
"Now our radar personnel are developing new functions. After they are integrated, it is said that they can be very useful for ultra-low altitude penetration. What is called, what is called..."
Qin Guan deliberately pretended to think in his brain, and the fellow Xiucai, who was just right to interpret simultaneously, was almost anxious to the person next to him, Rafael couldn't help but say, "Is it a synthetic aperture function?"
"Yes, yes!" Hearing the word translated by Xiucai, Qin Guan immediately patted his thigh: "Yes, it is said that it can be cross-linked with the flight controller to control the flight height. Once there is an obstacle in front, it can automatically Climb high."
The J-14 is a low-cost fighter, but it uses digital telex for pitch. What's the use? It can be cross-linked with the navigation system to achieve ultra-low altitude flight!
And Qin Guan knew that these Davidians needed this technology most.
The Lavi in ​​the Davidian plan mainly performs close air support and battlefield interdiction tasks, followed by air defense.
In other words, the Lavi is mainly used as an attack aircraft to replace the old McDonnell Douglas A-4 Skyhawk, McDonnell Douglas F-4 Phantom II and Israel Aerospace Industries Corporation’s Cub fighter.
Even now, their single-seater Lavi still plans to use the F404 turbofan engine, which is almost the same as the F-14.
But then they found that it could not meet the needs of future development, and chose the Pratt & Whitney PW1120 engine with greater thrust. The larger thrust makes Lavi comparable to the F-16 in the Israeli Air Force.
Thinking of this, Qin Guan suddenly found that he had overlooked a problem. Even if the funds were in good condition and the Eagle Nation military aid, the air force expenditure of David Nation might not be enough to support the two projects, right?
If they introduced the F-14 fighter and also introduced a production line in the Kingdom of David, what about their self-developed LAVI fighter?
How are they balanced?
It's hard to imagine, just wait until the meeting and set their words.