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Jakovlev Jak-15 [kód NATO: Feather]

Yakovlev Yak-15

Яковлев Як-15

Jakovlev Jak-15
Originální název:
Original Name:
Яковлев Як-15
stíhací letoun
DD.MM.1945-DD.MM.1945 Moskevský letecký závod č. 115, Moskva /
DD.MM.1946-DD.MM.1947 Tbiliský letecký závod č. 31 G. Dimitrova, Tbilisi /
Období výroby:
Production Period:
Vyrobeno kusů:
Number of Produced:
2 Moskva
279 Tbilisi
První vzlet:
Maiden Flight:
DD.10.1945 motorová zkouška
24.04.1946 13:56 první vzlet
Základní charakteristika:
Basic Characteristics:
Vzlet a přistání:
Take-off and Landing:
CTOL - konvenční vzlet a přistání
Uspořádání křídla:
Arrangement of Wing:
Uspořádání letounu:
Aircraft Concept:
Přistávací zařízení:
Landing Gear:
Technické údaje:
Technical Data:
Hmotnost prázdného letounu:
Empty Weight:
1852 kg
Vzletová hmotnost:
Take-off Weight:
2742 kg
Maximální vzletová hmotnost:
Maximum Take-off Weight:
? kg
9,200 m
8,700 m
2,270 m
Plocha křídla:
Wing Area:
14,83 m2
Plošné zatížení:
Wing Loading:
184,895 kg/m2
Počet motorů:
Number of Engines:
Tumanskij RD-10 o tahu 8,9 kN při 8 700 ot/min (907,5 kp)
Objem palivových nádrží:
Fuel Tank Capacity:
690 l (590 kg)
Maximální rychlost:
Maximum Speed:
786 km/h v 5000 m
Cestovní rychlost:
Cruise Speed:
689 km/h v ? m
Rychlost stoupání:
Climb Rate:
21,6 m/s
Čas výstupu na výšku:
Time to Climb to:
4,8 min do 5000 m
Operační dostup:
Service Ceiling:
10000 m
510 km
Maximální dolet:
Maximum Range:
? km
1-2x kanón Nudelman-Suranov NS-23 ráže 23 mm v přídi, 60 nábojů pro každý.
Uživatelské státy:
User States:
kód NATO: Feather

První sovětský stíhací letoun s proudovým motorem. Nosné plochy, podvozek, střední a zadní část trupu převzata z pístové stíhačky Jak-3U. Pohonnou jednotku tvořil proudový motor RD-10 (sovětská kopie německého Jumo 004).
Yefim Gordon, Early Soviet Jet Fighters, Hinkley, England, Midland, 2002, ISBN 1-85780-139-3
Marian Mikolajczuk, Yakovlev Yak-23, The First Yakovlev Jet Fighters, Sandomirez, Poland, Stratus, 2008, ISBN 978-83-89450-54-8
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Yakovlev yak-15[/heading:aaaaaa]

The first soviet fighter with a jet engine was a temporary solution. Designer Yevgeny Adler, belonging to the Jakovlevova OKB, took the best that was highly maneuverable and at the same time a powerful piston fighter aircraft How-3U and the German jet engine Junkers Jumo 004B, which began the soviet industry to produce under the designation Tumanskij RD-10.
From the original Yak-3U was taken wing, rear fuselage, tail surfaces, cockpit including instrument and controls, almost the entire electrical installation, brand new was bow, wing spar, motor mount, bottom rear fuselage cover for steel sheet, protecting the dural covering from the hot fumes. Jet engine RD-10 had approximately the same mass as the piston engine, VK-107A, plus they are not needed any radiator fluid and oil, just refill the cooling circuit had a weight of several tens of kilograms.
The first prototype was designated How-3 JUMO, he was ready for engine testing in October 1945. These tests were ingloriously, the stream of gases exiting from the engine immediately burned tail wheel and the cover steel sheets with it off so much that burned duralumin hull. The solution was the Russian simple, the tail wheel was replaced by a steel roller (this solution must have been very noisy and during take-off and landing for the aircraft had to create, literally, a tail of sparks). Under the steel sheets were inserted pads, this created an air gap that thermally odizolovala duralumin fuselage from the hot steel plates. The armament was powerful, in the bow were two cannons the NS-23, each with 60 shells. The second prototype, the Yak-15 was the chassis with a narrow track width – the wheels would drag in the direction from the hull to the ends of the wings, this solution apparently didn't pan out and the other aircraft returned to the chassis of the original. Compared to the original Yak-3 increased the capacity of the tank, the jet engine had a much greater fuel consumption.

The prototype of the Yak-15 flew for the first time 24. April 1946, on this day a mere hour previously filed and a prototype twin-engined jet fighter aircraft MiG-9.
Flight tests were carried out satisfactorily on the whole, it was found that the engine Jumo 004 does not have too good high-rise properties, if the aircraft got over 6 000 metres, started the engine performance decrease significantly and so the As-15 has not reached the calculated height of 13 500 meters, but the pilots had to be content with a height of 10 000 m. the Jet engine also had very limited time to use, originally, it was foreseen lifetime of 25 hours, but in practice it was 15-17 hours, and it was not allowed to use the engine in an emergency turn!
Public new As-15 presented at the moscow may day parade in 1947, above a Red square then the heads of the audience flying through a group of fifty Yak-15 and fifty Mig-9.

The entire production took place in the production plant no. 31 in the Georgian Tbilisi and there was produced a total of 280 aircraft of this type. Most of the aircraft served rather to the training of pilots and ground staff. The transition from the piston Jake on this jet plane was for the pilots quite simple. Armament was often reduced to installing a single cannon, or flew without weapons. Air defense of the state provided a more powerful twin-engine MiG-9.

Zdeněk Trávníček et al., Reactive planes, Our troops, Prague, 1965
L+K no. 9/1984, Memoir, How-15, Miroslav Balous
author archive

Jakovlev Jak-15 [kód NATO: Feather] -

Jakovlev Jak-15 [kód NATO: Feather] -

Jakovlev Jak-15 [kód NATO: Feather] -

Jakovlev Jak-15 [kód NATO: Feather] -

Jakovlev Jak-15 [kód NATO: Feather] -

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Jak-15, sovětský film/dokument...

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