Chapter 131: Show the climb rate of the J-8-3
Yang Fenghata did not respond immediately, but held his face with one hand and fell into thinking.
This concern is certainly justified.
At most, only two points of the J-8-3's participation in the exhibition are to find potential foreign customers, and the remaining eight points are all to win over the Chinese people.
But if it is put together with the Su-27 flight performance, then this effect...
He looked at the deputy chief designer Liu Ming and Chang Haonan who were sitting on both sides of him——
As his role in the August 3rd Project increased, the latter's seat when attending meetings also increased. As the tide has risen, everything has lifted. From the beginning, I could only huddle in the corner of the conference room with Lin Shikuan, to being able to be assigned a seat at the edge of the conference table, and now I can sit steadily at the front.
Although he may not stay in the 83 Project Project Team for a long time, this feeling...
It's still great!
After all, let alone sitting in this position in my previous life, even if I occasionally participated in a meeting, at most I was just a spectator.
It’s not even attendance.
“I think doing this will be self-defeating.”
Seeing Yang Fenghao’s posture, Chang Haonan felt that it was almost time for him to speak:
< br>“The Xiangzhou Air Show is not only a matter for Xiangzhou, but also for our entire China. This year is the first time it will be held. It is the time when we need to earn reputation most.”
“On the one hand, flying now The arrangements for the performance have been basically finalized. If it is changed at short notice, it will be detrimental to the reputation of the exhibition. ”
"On the other hand, even if the performance of the two Flankers is postponed to the next day, it does not seem to have a direct impact on us, but it will not make any difference to those who follow the air show."
< br>"As a late-developing country, we currently cannot produce an aircraft that surpasses the Su-27. There is nothing to be ashamed of. Going to the air show is originally to show our progress."
"Facing competitors Being timid and trying to make extra moves seems like we are deceiving ourselves and not being confident enough.”
Chang Haonan’s words quickly had an effect.
Those who were able to stay in the military industry in 1996 had a certain spirit of unwillingness to admit defeat.
Now, just in time to catch up with the successful test flight of the No. 04 prototype after the engine replacement, the long-term depression is finally released, and the morale naturally rises.
After being stimulated like this again, the effect is immediate.
Some immediately stood up and expressed their support:
"Chang Gong is right!"
"Don't care about the performance of the Su-27, we must not lose its momentum!"< br>
Some also continued based on Chang Haonan's analysis:
"Another point is that our J-8-3 and Su-27 perform on the same field, so the pressure should be on Sukhoi's side."
One sentence woke up more people.
"Yes, that makes sense..."
"Really speaking of the performance, Su 27's win is nothing, but if he is not as good as us, then he will lose face. Big.”
"..."
In fact, the person who made this suggestion at the beginning did not have any bad intentions. He could only say that caring would lead to chaos, and he really wanted to get the best performance effect from his own aircraft.
So everyone quickly reached a consensus on this matter.
"In this case, let's determine what items need to be arranged in this 20-minute flight show."
Yang Fenghata said and turned a page of the notebook in front of him:
"After all, ours is still a new aircraft, and the pilots performing the show will also need some time to adapt."
The atmosphere in the venue suddenly became lively again. "If an airplane performs...super maneuverability?"
Although everyone is engaged in aircraft design, they are not actually experts in flying itself.
As expected, someone immediately raised objections:
"It would be too risky to use a prototype aircraft that has not yet been designed and finalized to engage in super maneuvers. And I also know that the Su-27 will most likely perform the most classic Cobra maneuver. We cannot use our own shortcomings to attack each other's strengths. We have to think about what we have What unique advantages do you have?”
This speech was obviously very pertinent, so everyone started brainstorming along his train of thought.
"Unique advantages...but the things we are better at cannot be performed at air shows."
"Our ceiling is higher than theirs, but..."
The flight show itself is of a special nature. In order for the audience to watch it with the naked eye, it must be low-altitude and low-speed subjects, and the flight overload cannot be increased too much.
This is really not friendly enough for a high-altitude and high-speed aircraft.
Chang Haonan is also a little troubled at this time. The improvements he has made to the J-8-3 in the past few months are still focused on the maneuverability under low-altitude and low-speed flight conditions, so that the aircraft can fly to the past The 2.4 times the speed of sound, which I dare not even think about, is actually a matter of coincidence.
But no matter how good the second-generation aircraft's low-altitude and low-speed maneuverability are, you really have to compare it with the Su-27 with a lifting body design...
That's not the case after all.
While he was calculating possible performance content in his mind, he lowered his head and looked at other content arranged in the air show, trying to find some inspiration from it.
"Su-27 and Su-30 are flying against each other..."
In an instant, an idea flashed through Chang Haonan's mind.
“Actually, if I have to say it, we still have advantageous projects...”
“The No. 04 prototype can be focused on some vertical maneuvers, especially large-angle climbs. After replacing the new engine, the thrust-to-weight ratio of the aircraft exceeds 1 when taking off without weapons."
Of course everyone present is well aware of the basic performance of the aircraft, but there are still some people. There are concerns:
"Vertical maneuverability... But the thrust-to-weight ratio of the Su-27 is even higher. It is really better than the climb rate. Unless it goes above 15,000 meters, it will still not be advantageous."
"Common sense is true. That's true, but compared to other performances, there is still a certain amount of room for operation in this area."
Chang Haonan adjusted his sitting posture and said to the person who just spoke:
"I saw it. The performances submitted by Sukhoi were all performed by two planes, and the entire performance was very long."
"This means that the two planes have to load more fuel when taking off, and , among which the single-seat Su-27 aircraft has to cooperate with the movements of the two-seat Su-30 during the performance and cannot exert its full performance.”
Everyone is an expert, and after Chang Haonan mentioned something like this, they will naturally understand what is going on.
For almost all fighter jets, the two-seat version requires extra weight and space to accommodate an extra pilot and corresponding operation and life support equipment, so its performance is compared to that of the same model. The single-seat version will be weaker.
Depending on the specific model, the difference is about 5%-10%.
But the Flanker family is an anomaly.
Due to its iconic nose design with a depressed angle, the "rear seat" of the tandem two-seater model Su-27UB is strictly above and behind the front seat, and the height difference between the two pilots is huge.
This design brings unparalleled visibility to the back seat (which is useless in most cases, and is essentially to accommodate the huge radar), but it also greatly increases flight resistance accordingly.
This is not over yet, because the heightening of the cockpit will affect the vertical fin efficiency and directional stability, so the two-seater version has been replaced with a larger vertical fin...
In summary After adding more water and more water, the gap in flight performance of the two-seat Flanker compared to the single-seat version is much larger than that of ordinary aircraft. It is generally believed that it will be about 15% or even higher.
“Not only that, our performance time is relatively short, so there is no need to bring half a full amount of fuel according to the regular routine, and we can also reduce some weight.”
“In this way, inside and outside Calculated, at least from a physical perspective, it should be able to achieve vertical maneuverability that is not inferior to those of the two flankers.”
(End of this chapter)