Tu-98, which is the codification of NATO called "dorsal fin" - Soviet supersonic bomber developed in the OKB. Tupolev in the middle of 50-ies.
History of the Tu-98
Works on its creation started in April 1954, after the publication of the corresponding decree of the USSR. Chief designer of the project was appointed DS Markov.
Design of the Tu-98 took place in a short time and was completed by the middle of 1955 years. In parallel, the plant № 156 carried out construction of the first prototype machine, which was able to finish on time on 70%. A whole year waiting for the plane stood powerplant - AL-7F that arrived at the plant № 156 in February 1956 1956 In the summer, the first flying prototype was transported to the airfield Zhukovsky for testing.
Since June 1957, the stage started production tests the device, in which a number of checks carried out and dovodok. Accordingly, the state tests postponed for the second half of 1956
7.09.1956 - aircraft first flew. Supervised car crew headed by test pilot V.F.Kovalevym. Passing the test was difficult. Continuing problems with the hydraulic system and landing gear, sometimes fails new engines. In general, the new plane was even in addition to the technical errors very difficult to manage. These factors led to the fact that for the time of factory tests (June 1956 city - December 1957 was) just held 30 flights, the total time is equal 25 hours. 12 minutes. This caused discontent among the country's leadership, which is already in the midst of 1957 planned to start serial production of Tu-98.
But too many problematic issues was inherent in this model, as the first heavy supersonic aircraft and have not missed any state tests or in production. Heavy crashes «98» lasted until 1959 Over time, the plane was no longer seen as a shock unit and switched his attention to other options, and Tu-98 moved into the category of experimental aircraft. It was used as a flying laboratory during the creation of the Tu-128.
23.10.1960 - held on the last flight of the Tu-98, which ended in an emergency situation - the breakdown of the landing gear. After that, the only instance of the built decided to write off.
During the three years of production tests bomber had morally outdated and no longer meet the requirements of the customer.
However, efforts in the creation of the Bureau Tupolev Tu-98 were not in vain. Since 1957 of begin work on a deep modernization of the version of the aircraft by facilitating the construction and removal of the defensive weapons. Modification of the project has received the name of Tu-98A, and entered into a series under the symbol TU-24. Unlike the Tu-98, this aircraft was completely removed cannon defensive weapons (bow gun AM-23 and aft installation DC-18). The power plant equipped with upgraded engines AL-7F-1. The aircraft could conceivably carry two types of missiles - P-15A or P-15M.
Later Tu-24 received many constructive solution of problems of the basic model Tu-98. In particular, changes have affected the system chassis. Retraction of the main pillars are now performed in the wing fairings, and, as a consequence, increased track wheel chassis. The missile of class "air-surface" in this aircraft was not in limbo, and placed in the bomb bay. To improve the aerodynamics of the aircraft to reduce the diameter of the fuselage, change the location of the air intakes, tail section, cockpit, reduced radar radome.
The Tu-98 is midwing swept wing (sweep on the leading edge - 55 degrees). The structure of the power plant consisted of two engines AL-7F, who placed in the aft fuselage. Air intakes shifted slightly upwards. Main landing gear retracted into the fuselage, it caused a lot of trouble during landing on a runway with a concrete covering. Crew - 3 person: pilot-commander, navigator, navigator and co-driver operator. Jobs crew were equipped with ejection seats. The front part of the aircraft has a common pressurized cabin. Behind her placed the technical compartment with photo equipment (AFA-33 / 75). The structure of the fuel system as reservoirs were 4 core and centering one tank that housed in the fuselage.
Wing caisson dvuhlonzheronnoe.
Conventional aircraft control system, a fixed stabilizer. The designer has made emphasis on the application of irreversible servo control channels.
The front landing gear ended with two wheels, the main pillars had two pairs of wheels.
Tu-98 became the first Soviet bombers equipped with stern Rifle installation DC-18 and two guns AM-23. Aiming weapons facilities carried out by the sight of the radar signals CP-1 «Argon" antenna on which are placed at the top of the keel. The right side of the forward fuselage housed the gun AM-23, firing which could regulate the pilot.
The structure of the rocket and bomb armament of the aircraft could enter the following options:
suspension of high-explosive bombs (FAB-500, FAB-250, FAB-100) in various combinations;
Suspension rockets - up to 18-212 TRS or TRS-61 132 300 or NAR ARS-85;
for the purpose of Naval Aviation - mines AMD and AMD-100-500, torpedoes TAN-53, MAV, MAN PAT-52.
From the sighting equipment Tu-98 was equipped with a red-dot sight OPB-16 and radar "Initiative".
Tupolev Tu-98 characteristics:
|Wing area, m2||87.50|
|engine's type||2 turbojet engine AL-7F|
|neforsirovannom||X 2 6500|
|forced||X 2 9500|
|Maximum speed km / h||1365|
|Flight distance, km||2440|
|Practical ceiling, m||12750|
|Armament:||Three 23-mm gun AM-23|
|The maximum bomb load - 10-500 bombs FAB|
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