Jakovlev Jak-15 [kód NATO: Feather]

Yakovlev Yak-15
Яковлев Як-15
     
Název:
Name:
Jakovlev Jak-15 Yakovlev Yak-15
Originální název:
Original Name:
Яковлев Як-15
Kategorie:
Category:
stíhací letoun fighter aeroplane
Výrobce:
Producer:
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:
09.04.1945-DD.MM.1947
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
Osádka:
Crew:
1
Základní charakteristika:
Basic Characteristics:
 
Vzlet a přistání:
Take-off and Landing:
CTOL - konvenční vzlet a přistání CTOL - conventional take-off and landing
Uspořádání křídla:
Arrangement of Wing:
jednoplošník monoplane
Uspořádání letounu:
Aircraft Concept:
klasické conventional
Podvozek:
Undercarriage:
zatahovací retractable
Přistávací zařízení:
Landing Gear:
kola wheels
Technické údaje:
Technical Data:
 
Hmotnost prázdného letounu:
Empty Weight:
1852 kg 4083 lb
Vzletová hmotnost:
Take-off Weight:
2742 kg 6045 lb
Maximální vzletová hmotnost:
Maximum Take-off Weight:
? kg ? lb
Rozpětí:
Wingspan:
9,200 m 30 ft 2 ¼ in
Délka:
Length:
8,700 m 28 ft 6 ½ in
Výška:
Height:
2,270 m 7 ft 5 ⅜ in
Plocha křídla:
Wing Area:
14,83 m2 159.63 ft2
Plošné zatížení:
Wing Loading:
184,895 kg/m2 37.87 lb/ft2
Pohon:
Propulsion:
 
Kategorie:
Category:
jednoproudový turbojet
Počet motorů:
Number of Engines:
1
Typ:
Type:
Tumanskij RD-10 o tahu 8,9 kN při 8 700 ot/min (907,5 kp) Tumansky RD-10 maximum thrust 2,000.8 lbf at 8,700 rpm
Objem palivových nádrží:
Fuel Tank Capacity:
690 l (590 kg) 129.8 UK gallons (155.9 US gallons) (1,301 lb)
Výkony:
Performance:
 
Maximální rychlost:
Maximum Speed:
786 km/h v 5000 m 488 mph in 16404 ft
Cestovní rychlost:
Cruise Speed:
689 km/h v ? m 428 mph in ? ft
Rychlost stoupání:
Climb Rate:
21,6 m/s 4252 ft/min
Čas výstupu na výšku:
Time to Climb to:
4,8 min do 5000 m4,8 min to 16404 ft
Operační dostup:
Service Ceiling:
10000 m 32808 ft
Dolet:
Range:
510 km 317 mi
Maximální dolet:
Maximum Range:
? km ? mi
Výzbroj:
Armament:
1-2x kanón Nudelman-Suranov NS-23 ráže 23 mm v přídi, 60 nábojů pro každý. One or two fixed forward-firing 0.91 inch Nudelman-Suranov NS-23 cannons mounted in the nose, 60 rpg.
Uživatelské státy:
User States:
Poznámka:
Note:
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).
NATO reporting name: Feather


The Yakovlev Yak-15 "Feather " was a first-generation Soviet turbojet fighter developed by the Yakovlev design bureau immediately after World War II. It retained the wings, the tail-wheel undercarriage rear fuselage and tail unit of all-metal Yak-3U and used axial-flow Junkers Jumo 004B engine (Tumanky RD-10).
It Yak-15 was lightest ever operational Jet-fighter (5,820 lb loaded). First seen 05/01/1947 May Day Parade at Moscow.
Zdroje:
Sources:
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
http://www.airwar.ru/enc/fighter/yak15.html
http://base13.glasnet.ru/text/shavrov2/3-05.htm
www.militaryfactory.com
http://www.aviastar.org/air/russia/yak-15.php
URL : https://www.valka.cz/Jakovlev-Jak-15-kod-NATO-Feather-t2036#465419 Version : 0

Yakovlev Yak-15




The first Soviet jet-powered fighter aircraft was an interim solution. Designer Evgeny Adler, belonging to Yakovlev's OKB, took the best of what was available - a highly maneuverable yet powerful piston fighter Yak-3U and a German jet engine Junkers Jumo 004B, which the Soviet industry began producing under the designation Tumanskiy RD-10.
The wing, rear fuselage, tail surfaces, cockpit including instruments and controls, almost all electrical installation were taken from the original Yak-3U, the nose, wing spar, engine bed were completely new, the lower rear fuselage was covered by steel plates protecting the duralumin covering from hot exhaust fumes. The RD-10 turbojet engine was about the same weight as the VK-107A piston engine, plus no liquid and oil coolers were needed, only the cooling circuit cartridge weighed several tens of kilograms.
The first prototype was designated Yak-3 JUMO, and was ready for engine trials in October 1945. These tests were disastrous, the jet of gases exiting the engine immediately burned the tail wheel and the covering steel plates became so hot that they burned through the duralumin fuselage. The solution was simple in Russian, the tail wheel was replaced by a steel roller (this solution must have been very noisy and during takeoff and landing a literal tail of sparks must have formed behind the aircraft). Pads were inserted under the steel plates, thus creating an air gap that thermally isolated the duralumin fuselage from the hot steel plates. Armament was massive, with two NS-23 guns in the bow, each with 60 shells. The second prototype of the Yak-15 had a narrow-track landing gear - the wheels retracted from the fuselage towards the wingtips, this solution apparently did not work and other aircraft reverted to the original landing gear. Compared to the original Yak-3, the capacity of the tanks was increased, and the jet engine had much higher fuel consumption.


The prototype of the Yak-15 first flew on 24 April 1946, on which date the prototype of the twin-engine jet fighter MiG-9 had also taken off just an hour earlier.
Flight tests were quite satisfactory, it was found that the Jumo 004 engine did not have very good altitude characteristics, if the aircraft got above 6,000 m, the engine power began to drop noticeably and so the Yak-15 did not reach the calculated altitude of 13,500 m, but the pilots had to settle for an altitude of 10,000 m. The jet engine also had a very limited service life, originally it was calculated to have a service life of 25 hours, but in practice it was 15-17 hours and the engine was not allowed to be used in emergency thrust mode!
The new Yak-15 was introduced to the public at the Moscow May Day parade in 1947, a group of fifty Yak-15s and fifty MiG-9s flew over Red Square.


The entire production took place in the manufacturing plant No. 31 in Tbilisi, Georgia, and a total of 280 aircraft of this type were produced there. Most of the aircraft were used more for training pilots and ground personnel. The transition from the piston-powered Yak to this jet was quite easy for the pilots. Armament was often reduced to the installation of a single gun, or it was flown without weapons. Air defence of the state was provided by the more powerful twin-engined MiG-9.


Sources used:
Zdeněk Trávníček et al., Reactive Aircraft, Naše vojsko, Prague, 1965
L+K No. 9/1984, Monograph of the Yak-15, Miroslav Balous
http://www.airwar.ru/enc/fighter/yak15.html
author's 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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