Sukhoi UTB-2
| Sukhoi UTB-2 | |
|---|---|
|
|
| Type: | School bomb plane |
| Design country: | |
| Manufacturer: | |
| First flight: |
May 7, 1947 |
| Production time: |
1947-1949 |
| Number of pieces: |
176 |
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The Soviet Sukhoi UTB-2 ( Russian Сухой УТБ-2 ) was a military training aircraft shortly after the end of the Second World War . It was mainly used to train bomber crews . The name UTB stands for Uchebno Trenirowotschny Bombardirowschtschik (Учебно-тренировочный бомбардировщик), school and training bomber.
development
The design goal was to develop an aircraft that could be manufactured cheaply and that was easy to fly even by inexperienced pilots. The OKB Sukhoi received the development order . The design work began in 1946. In order to save time, the model was based on the Tupolev Tu-2 bomber, which was already in use and from which almost all components such as wings, tail unit and the rear fuselage were taken over. The engine nacelles were new, as weaker ASch-21 engines from Schwezow were used. The bomb bay was omitted completely, the practice bombs were carried on mountings under the fuselage.
The front fuselage section has also been changed. So that the flight instructor and student could find space next to each other, the bow had to be widened, which led to a bulge-shaped bulge. A third seat was reserved for a navigation student behind the two front seats. For a better view, the nose was given more generous glazing.
The construction work was already completed in 1947 and the UTB-2, which is 4,000 kilograms lighter than the Tu-2, took off on its maiden flight . Testing went smoothly and production started shortly afterwards. By the time it was discontinued in the late 1940s, 16 series of 176 UTB-2s had been produced, out of 520 originally planned.
In addition to its original role as a training bomber, the UTB-2 was also used as a tow plane for aerial targets and in the civilian sector for training pilots of multi-engine passenger and transport aircraft. Poland's air forces, which at the time had Tu-2 bombers in their inventory, also received the UTB-2.
description
The UTB-2 was a cantilevered middle decker in all-metal half-shell construction. The wing consisted of three parts. The vertical stabilizer was located on two end plates to the right and left of the horizontal stabilizer . The rear wheel landing gear was fully retractable, the main wheels drove into the engine nacelles. An adjustable two-blade propeller of the type WISch-IIIW, series 2 was located on each of the engines .
Technical specifications
| Parameter | Data |
|---|---|
| Year of construction (s) | 1947-1949 |
| Manufacturer | Plant No. 381 Moscow |
| Designer (s): | Pavel Sukhoi |
| crew | 4 (teacher / student / navigator / gunner) |
| span | 18.86 m |
| length | 13.98 m |
| height | 4.70 m |
| Wing area | 48.8 m² |
| Empty mass | 5386 kg |
| Takeoff mass | 6546 kg |
| Engine (s) | two air-cooled seven - cylinder radial engines Schwezow ASch-21 |
| Nominal power | 420 kW (571 PS) each |
| Starting power | 515 kW (700 PS) each |
| Top speed | 380 km / h at 1900 m altitude |
| Landing speed | 90 km / h |
| Rate of climb | 6.3 m / s |
| Rise time | 8 min at 3000 m |
| Summit height | 6000 m |
| Range | 950 km |
| Take-off run | 460 m |
| Landing runway | 375 m |
| Armament | a 12.7 mm UBT machine gun |
| Bomb load | 200 to 400 kg |
literature
- Wilfried Bergholz : Suchoi. Since 1927 . Motorbuch, Stuttgart 2018, ISBN 978-3-613-04045-8 , p. 56 ff .
- Wilfried Copenhagen : Soviet bomb planes . Transpress, Berlin 1989, ISBN 3-344-00391-7 , pp. 172 ff .
