Tupolev Tu-70


AN Tupolev in 1946 year decide for a short time to design and build on the principle of air units of the machine B-4 (which was created on the basis of the US In-29) four-passenger aircraft with cabin hermetic type, who would be able to meet international requirements for long-haul aircraft. B-4 is a great base model, since it is well demonstrated in the factory itself, and flight tests. Deputy chief designer, together with his subordinates, it was decided as a codification of the aircraft «70».

After approval of the sketch began construction of a new passenger layout apparatus (February 1946 years). In the same year, in mid-March, the Council of Ministers has set the task of OKB Tupolev about designing and building passenger aircraft Tu-12 based B-4. Tu-12 an official designation for this aircraft. Initially considered the construction of the prototype, the serial production it was decided to talk after the state tests.


The acceleration of the construction of the first Tu-70 was decided to be affected by the maximum use of aggregates of two American B-29 vehicles. The first was completely disassembled in order to copy it, and the second one was damaged during the forced landing in the north of the country. From V-29 decided to remove and use in the design of the aircraft engine nacelle, removable wing parts, flaps, the main chassis and the mechanism for its harvesting, certain parts of the equipment and aircraft systems, as well as the tail assembly. Since the new air vehicle was designed according to the low-plan scheme, the center wing was carried out anew, and it was slightly enlarged in scope.

Completely new to the airplane fuselage became hermetic (diameter 3,6 m) with thiokol tape and hermetic riveting. The fuselage was designed to drop 0,57 atmospheres. The technology used for the first time in the USSR. For the first time in the course of construction of the machine check its integrity made way air supply to the current drop. Among other things, it stands out among the innovations more appropriate step form before the cabin crew.


According to the project it was clear that «70-th" is a passenger aircraft type, the main purpose of which is the commission on international flights and long-haul domestic and transoceanic routes. Ability comfortable liner to conquer a large distance with passengers on board gave him the right to be first-class heavy passenger plane. It involves the construction of Tu-70 in three versions:

  • 1) linear - designed for 72 passenger seats with two first-class cabins;

  • 2) mixed, which would accommodate from 40 to 48 people, with two front luxury passenger cabins and a rear first class cabin;

  • 3) special government - 10-15 people of the highest echelon.

The first prototype was built in the beginning of October 1946 years. Immediately afterwards it was decided to start production tests. They were held in the period from October to February 46 1947 years. November 1946 year was a significant date for this air machine, because it has made its first flight. In the air he raised three people: a test pilot and commander F. Opadchiy second pilot A. Flight and chief project engineer Mikhail Yegorov. The flight was successful, however, it occurred unpleasant story during the fourth test flight.

Tu-70 Salon

The plane was damaged after the forced landing, due to the fact that one of the engines was damaged in the air, a fire started. The commander of the aircraft still managed to land the car, no one was hurt. Engineers from the OKB conducted a thorough inspection and found a serious design defect in the initial US engine control unit. Much credit for the repair is given to the project engineer, M. Egorov, as he scrupulously approached the problem of the American power plant. It is because of this defect in the engine design in 1943 that the American tester B-29 died.

Thanks to the work carried out to identify and correct a constructive error, all the produced Tu-4 aircraft were modified. Tu-70 began to recover directly in the field. After completion of the entire power plant and its verification, the aircraft continued flight tests until October 1947. After this, a number of inspections and construction observations were carried out, after which the aircraft was sent for state tests. The commission checked the plane until December of the same year, and the result was the approval of the aircraft, as it corresponded to the tasks and parameters set by the government.

First, the decision was made about the production of the aircraft into series production. The plan was to release 20 copies, but the aircraft never went into series. The reasons were a lot, but the most important was a big congestion of aircraft manufacturing plants release of new series of combat aircraft for the Air Force, including Tu-4. An additional reason was even simpler. Domestic line CAF that period did not need such a large passenger carrier.

"Aeroflot" was not angling a plane because it fully satisfied the IL-12 and Li-2. A similar situation occurred with quite good and promising military transport Tu-75. Soviet Air Force felt that it is inappropriate and premature for the Airborne Troops. But this work was not in vain, because the construction of ships with a huge range of flight, defined new powerful turboprop and turbojet engines enabled the Soviet aircraft look to build long-range passenger aircraft from a new angle.


History passenger airliner Tu-70 1954 ends in the year. Due to the incompetent and the emergence of "Aeroflot" a new and modernized aircraft of the same class «70-th" was decommissioned and scrapped.

Tupolev Tu-70 characteristics:

Modification   Tu-70
Wingspan, m   43.05
Aircraft Length m   35.61
Height, m   9.75
Wing area, m2   161.70
Weight, kg  
  empty aircraft   38290
  maximum take-off   51400
engine's type   4 PD ASH-73TK
Thrust, kN   X 4 2375
Cruising speed, km / h   563
Practical range, km   4900
Practical ceiling, m  
Crew   6
Payload:   up to xnumx passengers


Tu-70 video



Well, I do not know, this plane really was ahead of its time, it was a pity that Aeroflot did not need such cars, the country did not recover from the war. And as a member it would certainly be a very expensive plane, but of course he contributed to the aviation industry. But the car is very beautiful.

Tu-70-plane modification of the old Tu-4. I like him. Since all the technical characteristics normally. Significant deficiencies I have not noticed. As in my opinion, they do not exist.
The crew of the plane is not small and it pleases, because the more people, the better. Total Tu-70 8 people can be. It is not very much, but not too small.
The maximum speed that can develop the aircraft near the ground - 568 km / h. What is also impressive.
At maximum load the aircraft can easily fly 5000 km. This figure is normal. For a moment Tu 21-70 can develop 5000 height in meters and I like it, because in those years, such as the flying machines that were very much appreciated, but unfortunately, they are quickly removed from the production, and then closed altogether. Rather it must be said that this plane was the only one. Nothing else is made, and it was very bad.
All test flights, he showed good results.
I like this plane, even though what he has, how many years, and that about a few people remember. His technical and flight characteristics were good, and he could still serve as armed.

Poor seventy one time could only be circumvented. But a good freighter would have been, if not military orders. Eli compare it with the B-4, then confidently declare - weapons of it was not. According to the characteristics he excelled Tu-4 (his relatives), but in terms of tonnage, conversely inferior. Nevertheless, good air bird.

Another offspring of the US In-29. It seems that without America creeps Tupolev during the fifties yourself not as well would not be able to make sensible plane. Again, make do, experienced, everything seems normal, but with a standard troit will not. In general, I can not understand. Why was it necessary to modify it for use if Aeroflot passenger still not be able to use it? What's the point? Like, we can, that we build. It would be better money, time and knowledge to something worthwhile spent.

About the Tupolev I did not know, but Myasischev developed, although similar to the B-29, but his own. True decided to just copy Boeing, justifying it something of great potential.