In 1987, work was completed on the creation and certification of the Yak-42D.
Even though outwardly the aircraft practically did not change, with the same fuel tank capacity, its range increased by about 25% due to an increase in the maximum take-off weight to 56.5 tons. With the same payload of 10.5 tons, the Yak-42D took more kerosene per ton, and its range with an air navigation fuel reserve was 2150 km. Many other operational characteristics were improved: the maximum barometric altitude of the airfield and the permissible lateral wind component during take-off and landing increased, the allowable coefficient of adhesion to the runway surface decreased, the landing gear brake wheels received fans that improved braking performance. The front entrance door was redone according to the standards of European telescopic galleries, which made the aircraft attractive for international traffic.
Among other things, this aircraft is also distinguished by the fact that it can be safely operated at airfields that have short runways with a length of only 2200 m. To the credit of the creators of the Yak-42, I must say that abroad, machines with such a flight weight on runways of similar sizes are not allowed. High take-off and landing characteristics are achieved with the help of excellent load-bearing properties of the wing. Suffice it to say that on an airplane with flaps released at 45, a lift coefficient of 2.7 was obtained. This allowed reducing the approach speed to 210 km / h. There is no other aircraft with similar indicators either here or abroad. So, the Tu-134A, for example, during planning at landing approach keeps a speed of 270 km / h. The fact is that the low speed during the approach, especially in extreme conditions, says, a sharp deterioration in the weather, with poor visibility, helps the crew make the right decision. In other words, the lower the landing speed, the more time the pilots have to think about a difficult situation.
Recently, a decision was made to suspend work on a new Yak-242 project with a passenger capacity in the range of 130-180 seats. This aircraft was to be equipped with a supercritical wing and PS-90A engines. More than 30% of the design work has already been completed. However, as always, financial difficulties temporarily complicate this research.
- Modification of the Yak-42D
- Wingspan, m 34.88
- Aircraft Length, m 36.38
- The height of the aircraft, m 9.83
- Wing Area, m2 150.0
- Weight kg empty equipped aircraft 34580; maximum take-off 56,500; fuel 18500
- Engine type 3 turbofan engine Progress (Lotarev) D-36
- Rod, kN 3 x 63.74
- Maximum speed, km / h 810
- Cruising speed, km / h 750
- Ferry range, km 4000
- Practical range, km 2700
- Range with maximum load, km 1480
- Practical ceiling, m 9100
- Crew 2
- Payload: 104 passengers in a cabin of two classes or 120 in a tourist class or 39-49 passengers in the VIP version or 13500 kg of commercial cargo.