Yakovlev Yak-17


Yak-17, which NATO classification called Feather, - the development of a jet fighter Yakovlev. The basic model for its production served as the Yak-15. aircraft first flew in May of 1947 During serial production in 1947- 1949 years. 430 aircraft was built. Basically, they used to train flight crews, as well as exported to Eastern Europe and China.


History Yak-17


After flight testing Yak-15 was compiled act, which dealt with the modification of the Yak-15 in the trainer version, which has a three-wheeled chassis and dual controls. Having a job, OKB designers set about designing and developing single Yak-Yak 15U and double-21T. As standard release cycle machines acquired titles respectively Yak-Yak-17 and 17UTI.


Improvements serial Yak-15 for training options was carried out in the factory Dolgoprudnom №464. There 1947 April, he was received the first copy of the Yak-21T, without weapons, with the nose landing gear, equipped with a cabin for two people. The first flight of the Yak-21T was committed 6.05.1947 running pilot GS Klimushkin.


Factory tests managed to finish in 2 weeks, then sent to the machine state tests in GK Research Institute of the Air Force, which were completed 10.08.1947.


Despite the fact that the training fighter did not show the expected estimated flight indicators for the Air Force's insistence that while much needed in a training of attack aircraft, he was recommended to put into mass production, equipping fotokinopulemetom C-13 and gun NS-23KM.


Yak-15U was also built on the basis of the serial Yak-15 in Dolgoprudniy. The training fighter was equipped with two NS-23 guns, an ASP-1 sight and a PAX-22 photo-gun. Applying the new layout of the chassis, I had to change the nose and the design of the wing of the device. The cockpit of the pilot increased in length and height. The new lamp provided the pilot with a better overview than the original model. Changes have also affected the form of feathering: the keel and horizontal plumage are enlarged in size. The problem of a small fuel supply was solved by installing additional wings of the end fuel tanks.


The first flight of the Yak-15U took place in June of 1947, 10 factory tests completed in August. Until the middle of November lasted for state tests, after which experts from the Soviet Air Force aircraft delivered satisfactory assessment.


After minor modifications Yak-15U in March 1948 he was again entered the state tests, and then received a recommendation for mass production.


Serial production of the Yak-17UTI settled on a number 31 aircraft factory in Tbilisi. Here, for a period of 1948-1949 years. 430-17 Yak and Yak-17UTI was built. In comparison with the prototype production models differed enlarged scale horizontal tail, upgraded guns NS-23KM and additional fotokinopulemetom C-13. Aircraft later series were equipped with jet engines RD-10A who had lifespan 50 flight hours.


Operation Yak-17


The first copies of serial Yak-Yak-17 and 17UTI began to arrive in the Soviet Air Force in regiments 1948 of them were sent not only to the part of the defense for the development of the Yak-15, but also in other military units to get acquainted with the work of the soldiers jet combat aircraft. The use of the aircraft for military purposes was ineffective. This prevented the low margin service life, small range and low reliability of the motor RD-10. Emergency cases in the form of fire, burning blades, unauthorized switching off the engine, and so on. N. This occurred on the aircraft and its modifications often.


Nevertheless, simple operation, excellent visibility from the cab, low landing speed and short takeoff distance making it a great workout machine. Thanks to the above qualities, inherent in the Yak-17, raised the issue of the transition shock aviation piston powerplants on the jet.


Armed with the plane did not stay long and by 1952 was completely written off with the operation of all military units.

Yak-17 characteristics:

Modification   Yak-17
Wingspan, m   9.20
Length m   8.70
Height, m   2.30
Wing area, m   14.85
Weight, kg  
  empty   2081
  normal takeoff   2890
  maximum take-off   3240
engine's type   1 TRD RD-10A
Thrust, kgf   X 1 910
Maximum speed km / h  
  near the ground   700
  on high   748
Practical range, km  
  without PTB   395
  with PTB   717
Ceiling, m   12750
Crew   1
Armament:   Two 23 mm HC-23 guns with 60 ammunition per gun.


Yak-17 video:



When creating a single fighter with the Yak-17 TRD, aviation engineers tried to get rid of the main drawbacks of the Yak-15. The plane used a chassis with a nose wheel, which required certain changes in the design compared with the base model. The subsequent increase in weight and, as a consequence, the reduction in the already short range were compensated by the placement of additional fuel tanks on the wing tips, which were exhausted when exhausted in flight. Increased the size of the pilot cabin Yak-17. Improvement of shape and plumage area allowed to improve the controllability and stability of the machine in flight, to reduce landing speed and mileage. Also, a training and training double version of the Yak-17UT was developed. On it, the chassis had the same design as the Yak-15.
In spite of the improvements carried out, the use of Yak-17 in military operations looked bleak because of the low reliability and low engine life (up to 50 hours.). However, the plane was heading with regard to training and retraining for the operation of a fundamentally new type of aircraft. The Soviet troops Yak-17 served long. After 1948, their steel supply brotherly armies of Czechoslovakia and Poland.

I am currently actively studying old models of domestic aircraft. Machines Yakovlev by right consider the most interesting, since the designers of this bureau often dealt with new and sometimes even unusual models. About Yak-17 I can say so much. This small jet device was mainly used to train pilots, since such aircraft only began to appear. Even though the ego was not used for long, it served as a launch for the further development of jet aircraft in the Yakovlev Design Bureau. Who knows more information about this aircraft, I will be grateful.


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