One fuselage for Russian aircraft is now not enough

1 2018 June 5

From the first days of the birth of aviation, designers experimented with the design of aircraft. Most of them were unsuitable for use and today the appearance of aircraft for completely different purposes is approximately the same. But engineering and aircraft manufacturing do not stand still, and a new development is ripening in the domestic industry.

We are talking about the recently tested at the Moscow Central Aerohydrodynamic Institute. Zhukovsky model of an average transport two-fuselage aircraft. The purge tests were carried out in the takeoff and landing configuration, and their goal was to determine the aerodynamic qualities of an aircraft with various wing designs, in which the shield with a sawtooth trailing edge showed a significant decrease in the aerodynamic resistance of the model relative to the shield with a straight edge. In addition, an assessment was made of the effectiveness of elevators and directions.

The development and testing of a twin-body aircraft are part of the state program for the development of the domestic aviation industry. The project also plans to create a cargo aircraft with a carrying capacity of up to 40 tons, and the two-body structure, according to the developers, will seriously facilitate and speed up loading and unloading. The model being tested at the moment will become a platform for the air launch of missiles. The aircraft will allow launching small rockets into low Earth orbit.

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beeper

0

2 June 2018 00: 27

It would be interesting to look at the picture of the flow around this particular model ?!
In my opinion, the designers are in captivity of stereotypes and are trying to solve a non-trivial problem in a trivial way - mechanically transferred the cross-sectional contours of the "normal" fuselage to the "twin", without taking into account their known mutual influence in the airflow ?!
And taking into account that a rocket of comparable size will be suspended, a more interesting section and mutual layout of the fuselages suggests itself.
The chief designer of this "twin", going to bed, needs to put a blank sheet of paper and a pencil next to the bed to sketch the layout solutions dreamed in a dream, so that his plane turns out to be really beautiful and flying. If the designer really burns with his work, then you will definitely dream of such an airplane that the whole world will gasp, because the plan is good and the task is not ordinary!
And what we see in the photograph is more like a typical school or student work of a diligent student who does not go beyond the textbook. Yes, cheap and cheerful, such a designer from two standard, well-developed fuselages and the same as in the textbook, the wing will fly like everyone else. But you can go beyond the usual and achieve more - you must strive for this in order to go ahead of the competition, and not in the general herd! IMHO
1. Vkd dvk
  
  +1
  
  3 June 2018 15: 36
  
  It looks like you were not the first to be holding a document with the name Terms of Reference.
  Then why don’t you remember how it is written?
  In the beginning was the word.
  Simple and unpretentious. And only after some time, the word began to acquire details and details.
  Often the "fish" (the first edition of the TK) is thrown into the basket and a new one is written and completely different from the "fish". The difficulties of introducing two-body vehicles are not in mathematics, but in the future - at the stage of expanding the take-off and taxiways of the airfield network.
gridasov

+1

3 June 2018 09: 14

One can definitely say that the direction of development was not chosen logical. Quantitative methods to improve the flight performance of the aircraft is simply impossible. First, new methods are needed to analyze the interaction of the flight medium and the outflow surfaces, and secondly, new fundamental transducers of the air and liquid are needed. New propulsors as energy converters of the hydro-gas-dynamic flow will allow, firstly, to expand the boundaries of their rotation speeds in a trouble-free mode, which means to increase traction parameters, secondly, it becomes possible to use the energy of resistance to the object’s movement in any medium, which will directly affect the economy, and thirdly it becomes possible to control the flight and maneuverability of a controlled flow, rather than aerodynamic planes in the form of wings, etc. And of course, that the flight of aircraft at hyper speeds, but explicit transition levels of flight at low speeds and then to higher are possible only on the more optimal forms of the entire aircraft
1. beeper
  
  +1
  
  3 June 2018 09: 39
  
  You, Comrade Gridasov, think so broadly, so globally, already at the level of near-planet ash-trappers ?!
  In this case, the task is to develop an effective transport platform for air missile launch! Such a transporter should not attain any "hyperspeeds", or even the speed of sound, and should not a priori. IMHO
  PS In what I certainly agree with you that only quantitative methods, mechanically pairing typical single-body transport aircraft, cannot achieve optimal flight qualities, although such a "twin" will fly
The comment was deleted.
master3

-1

5 June 2018 17: 14
Sound familiar?