Grochovskij G-26

Grokhovsky G-26
Гроховский Г-26
     
Název:
Name:
Grochovskij G-26 Grokhovsky G-26
Originální název:
Original Name:
Гроховский Г-26
Kategorie:
Category:
stíhací letoun fighter aeroplane
Výrobce:
Producer:
DD.MM.1935-DD.MM.1936 Letecký opravárenský závod č. 47 Maxima Gorkého, Leningrad /
Období výroby:
Production Period:
DD.MM.1935-DD.MM.1936
Vyrobeno kusů:
Number of Produced:
1
První vzlet:
Maiden Flight:
DD.MM.RRRR neuskutočnil sa
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:
1292 kg 2848 lb
Vzletová hmotnost:
Take-off Weight:
1640 kg 3616 lb
Maximální vzletová hmotnost:
Maximum Take-off Weight:
? kg ? lb
Rozpětí:
Wingspan:
7 m 22ft 11,58in
Délka:
Length:
6,33 m 20ft 9,21in
Výška:
Height:
? m ?
Plocha křídla:
Wing Area:
8,96 m2 96.44 ft2
Plošné zatížení:
Wing Loading:
183 kg/m2 37.48 lb/ft2
Pohon:
Propulsion:
 
Kategorie:
Category:
pístový piston
Počet motorů:
Number of Engines:
1
Typ:
Type:
Hispano-Suiza 12Ybrs - vidlicový štvortaktný zážihový kvapalinou chladený dvanásťvalec o výkone 633 kW/860 k Hispano-Suiza 12Ybrs - Twelve-cylinder supercharged liquid-cooled 60° V12 engine, power 848 hp
Objem palivových nádrží:
Fuel Tank Capacity:
? ?
Výkony:
Performance:
 
Maximální rychlost:
Maximum Speed:
5651) km/h v 3380 m 351.11) mph in 11089 ft
Cestovní rychlost:
Cruise Speed:
? km/h v m ? mph in 0 ft
Rychlost stoupání:
Climb Rate:
? m/s ? ft/min
Čas výstupu na výšku:
Time to Climb to:
? min do m ? min to 0 ft
Operační dostup:
Service Ceiling:
8000 m 26247 ft
Dolet:
Range:
750 km 466 mi
Maximální dolet:
Maximum Range:
? km ? mi
Výzbroj:
Armament:
2x 7,62mm guľomet ŠKAS 2x 7.62 mm ShKAS machinegun
Uživatelské státy:
User States:
- -
Poznámka:
Note:
1) max. rýchlosť pri zemi: 490 km/hod
pristávacia rýchlosť: 159 km/hod
dĺžka štartovacej dráhy: 450-700 m
dĺžka pristávacej dráhy: 420-600 m
1) Max. speed at ground: 298.3 mph
Landing speed: 98.8 mph
Zdroje:
Sources:
Маслов, M.A.:Роковой истребитель Чкалова - И-17, И-180, И-185, Moskva, Eksmo, 2011, ISBN 978-5-699-47225-3
Шавров В.Б. История конструкций самолетов в СССР до 1938 г.
http://www.airwar.ru/enc/xplane/g26.html

Grochovskij G-26 -


URL : https://www.valka.cz/Grochovskij-G-26-t193499#557257 Version : 0

Grochovsky G-26 - origin and development





The single-landing-wheel aircraft scheme was first used in the Soviet Union by Stahl-6, an Italian-born Roberto Bartini designer, on his experimental flying machine. Although it initially seemed that this concept would find a use as a fighter, developed further as the Stahl-8 (military designation I-240), it did not, and Bartini's project was cancelled in late 1934 as unviable. When, therefore, on the same type of chassis, i.e. with one wheel on the undercarriage leg retracted into the fuselage, a machine of almost the same weight category, designated G-26, was built in Grochovsky's Special Design Bureau in 1935, one may rightly ask what was the significance of this. Logically, no design bureau would waste energy and resources on a machine of the same conception, which had already received a clear stop from the state authorities a year earlier.


However, we must remember that we are in the realities of the Soviet Union in the 1930s. The Communist Party, led in most cases by incompetent individuals who are, however, capable of anything, is holding the reins of power firmly and uncompromisingly. People come to power through acquaintances, family connections and often by simply denouncing a rival out of hostility to the state system. Roberto Bartini Roberto Bartini is a foreigner who had to flee his native Italy due to the accusation of anti-fascism and sought protection in a state "where tomorrow means yesterday", as the propaganda slogan of those times proclaimed. And although he is a member of the Communist Party and his ideas are in many cases more than inventive, it is precisely this "capitalist" past that makes him, in the eyes of the other Soviet designers, a person with whom they are unwilling to share their ideas or their productive capacities. Only the protective hand of the commander of the P.I. Baranov and senior army commander M. N. Tukhachevsky, who recognized the talent of the young Italian designer, allowed him to run his own design bureau. However, Baranov dies in 1933 in a plane crash, and clouds of intrigue and provocation begin to descend upon Tukhachevsky, ending with his being accused of treason and shot in 1937.


In such an atmosphere, it is therefore not at all surprising that a team led by the equally exceptional Pavel Ignatyevich Grochovsky, a design engineer of equal distinction who still enjoys the support of the state and party top brass, begins work on the same project, which has already been unpromisingly halted. To be precise, the designer of the G-26 was not Grochovsky directly, but his deputy, the then only 24-year-old Boris Dmitrievich Urlapov (Борис Дмитриевич Урлапов). It serves Urlapov to his credit that he modified Bartini's idea at least slightly. While Bartini's Stahl-6 had auxiliary structures preventing wing contact with the ground at the wingtip and were hinged, the G-26 had them fixed and located in the first third of the wings, away from their roots. Another difference was the significantly different wing area loading driven by the desire to achieve the highest possible speed. While the Stahl-6 had an area load of 104 kg/m2, the G-26's increased to 183 kg/m2[/supaa]. Just for comparison, the area load of standard fighters of those days ranged from 100-115 kg/m2. Work on the project lasted about a year, and although the G-26 prototype's work-in-progress reached 90-95%, further than the Stahl-8, it suffered the same fate. In 1937, the Grochov Experimental Institute, as it was later renamed, was liquidated, with its staff assigned to other offices. A commission of the Central Directorate of the Aerospace Industry, while inspecting the activities of the Experimental Institute, firmly evaluated the "apparent lack of prospects" of the already almost completed aircraft and ordered it to be destroyed. And since destroying the work and ideas of others always went well with the Soviets, immediately after the decision was made, parts of the plane were dragged to the rear of the factory airfield, doused with petrol and set on fire. Thanks to this, we will never know if the G-26 would have actually reached the designers' calculated speed of 600 km/h. Just for comparison - the first production Messerschmitt Bf 109B at the time reached a speed of 450 km/h.


Maslov, M.A.:Роковой iстребитель Чкалова - И-17, И-180, И-185, Moscow, Eksmo, 2011, ISBN 978-5-699-47225-3
https://www.airwar.ru/enc/xplane/stal6.html
https://www.airwar.ru/enc/xplane/g26.html
URL : https://www.valka.cz/Grochovskij-G-26-t193499#557269 Version : 0
Маслов, M.And.:Роковой истребитель Чкалова - И-17, И-180, И-185, Moscow, Eksmo, 2011, ISBN 978-5-699-47225-3
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kostra krídla v štádiu stavby, Leningradský letecký závod č. 47, rok 1936
URL : https://www.valka.cz/Grochovskij-G-26-t193499#557265 Version : 0
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