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Is there a hint in the promo?
As we all know, on medium-sized stealth fighters such as the J-31/35, there are no side magazines, which will have fewer advantages for close-range air combat.
The side bomb magazine can quickly launch missiles in a high maneuver state, which is a point that the belly bomb bay cannot do, and the medium-sized stealth fighter has not been able to realize the use of the side bomb magazine because of technical limitations, so it has become a big regret in the field of fighter jets in various countries.
But now, the situation seems to have changed, and in the recent promotional video of "Seventy-three Years of Prosperity" released by Shen Fei, a fighter jet at the end is really eye-catching.
Judging by the CG diagram, this fighter not only has a side magazine, but also can even accommodate two combat missiles according to the specifications.
The fighter did not specify the model, but only used the name "Falcon Aircraft", which is the nickname of several medium-sized stealth fighters such as the J-31.
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And judging from the appearance, the single front wheel, thin neck and the "J-31B" number on the side all reveal that this fighter model is J-31.
So is this single J-31 with a side bomb bay possible to become a reality, and what difficulties will it face to achieve the prototype in the CG.
Why are there no side bomb bays
Whether it is the well-known J-31 or the American F-35, they are medium-sized stealth fighters, so their size does not allow them to achieve the best of both worlds.
The side bomb bay is not what we think, that is, it can be achieved by opening a hole in the side, putting some equipment lines and adding a bulge, and its production is much more difficult than the belly bomb bay.
The side bomb bay does not look big, but it takes up a lot of space, and the hydraulic press and telescopic pylons are indispensable, otherwise the missiles stored there will not be able to overcome the air pressure at high speed, and the phenomenon of detachment will occur.
Therefore, the body of the medium-sized stealth fighter cannot support the existence of the side bomb bay, of course, some people say that the combat missile can be placed in the main bomb bay together, only if it is not feasible, in fact, it is okay, but in doing so, it will lose the "stealth" characteristic.
If it is in the main bomb bay, it is necessary to ensure that the magazine is in an open state before it is launched, so that it can be detected at once that it is a fighter plane, and it is clearly called a stealth fighter but has lost its stealth, and this deal is not cost-effective.
Advantages of the side bomb bay
Some people also believe that the side bomb bay is dispensable, and there is no need to make a big deal in this regard, but in fact, for stealth fighters, the side bomb bay has a great role.
Although stealth fighters are used in over-the-horizon combat, in fact, the probability of producing close combat is not small, for example, it was originally an aircraft stealth, which can evade the detection of fighters of other countries.
But now, stealth fighters have become a common strategic weapon, you can't detect me, I can't detect you, flying and flying two sides will touch a piece, can only engage in close combat.
The launch speed of the side bomb bay is much faster than that of the main bomb bay, and once a close battle occurs, it can be said that whether there is a side bomb bay is the key factor in determining the outcome of the battle.
Side bomb bay of CG diagram
Speaking of the propaganda video, there are two combat bombs in the bomb bay here, and from the perspective of stealth fighters of other countries, the internal bomb bay is basically used to reduce the radar monitoring area.
The side bomb bay is generally found in heavy stealth fighters such as F-22 and J-20, the main bomb bay is used to place medium and long-range air/ground missiles, and the side bomb bay houses combat bombs, despite this, these heavy fighters can only store one combat bomb on each side.
According to the data, the number of missiles of the J-20 is four air-to-air missiles in the main bomb bay in the abdomen, one Thunderbolt-10 close-range combat air-to-air missile on each side, and the same is true for the F-22 in the allocation of side bomb bays.
On the other hand, the F-35 medium-sized stealth fighters do not have a side bomb bay, and there are also medium-sized stealth fighters with a side bomb bay, and it is the Russian Su-75, its side bomb bay is installed obliquely, including the ammunition carried is also tilted.
This does save space and solves the problem of the side bomb bay, but there are also a lot of drawbacks, the most intuitive point is that after its side bomb bay is opened, its drag coefficient will be greatly increased, and after launching the combat missile, the hatch can not be closed in a short time, and the stealth will also have an impact.
Therefore, it is not realistic for a medium-sized stealth fighter to have a side bomb bay that can accommodate two combat bombs on one side, so whether the side bomb bay in the CG diagram is a mistake by the modeler, or Shen Fei is worth thinking about.
Not using the side bomb bay is the best option right now
For those medium-sized stealth fighters that do not have side bomb bays, close combat can only sacrifice stealth to open the main bomb bay or risk leaving the battlefield.
All countries understand this problem, but they still haven't worked on the side bomb bay, not because the side bomb bay is not important, but in comparison, the advantage that can be brought by sacrificing this is better, otherwise those heavy stealth fighters do not need to have a side bomb bay.
The main bomb bay can be stuffed with combat bullets, which was mentioned above, and although this will lose stealth in close combat, it is still much better than nothing.
The side bomb bay is different, it can only be stuffed with close-range combat bombs, fundamentally speaking, medium stealth fighters still carry out long-distance air-to-air missions, and the applicability of the main bomb bay is obviously better than the side bomb bay.
And now all countries do not have a good solution to the side bomb bay of the medium stealth aircraft, and only the Su-75 gave up the overall space and stealth in exchange for the side bomb bay.
Therefore, relatively speaking, the starting point of close air combat of medium stealth aircraft is the same, and there is no threat advantage for either side, so at this stage, not using side bomb bays may be the most correct choice.
end
Of course, this does not mean that the J-31 promoting CG is a mistake of the modeler, and the combat bullet matched with the side bomb bay may be the key to breaking our cognition.
Those two combat bombs have no wings, and they are obviously not the Thunderbolt-10 we are familiar with, so not only the hidden bomb bay, but even the missile may be new.
Moreover, the "Falcon" in the promotional video may not be the kind we know, the J-31 is a model, and the 31-B may be a new version of the increased volume, just like the ProMax in the mobile phone.
Before the detailed data of this fighter is officially announced, these are just our expectations, whether it can be realized or not, the promotional video display of Shenfei is worthy of our applause, it allows us to see every progress in China's aviation field, let us feel the shock from the blue sky.
If the last fighter is really the design of the J-31B, then it can be considered that the mainland is fully prepared for the possible stealth air combat in the future.
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References
Aviation industry
Baidu Encyclopedia
Global Times Military 2018-11-11 13:21——Celebrating the 69th anniversary of the founding of the People's Air Force J-20 fighters and 4 aircraft appeared in a rare bomb bay
Chinese Arsenal2019-08-21 17:16:29 - J-31 technical characteristics