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Alekseyev I-211

Soviet Union (1947)

Detailing the development and operational history of the Alekseyev I-211 Jet-Powered Fighter / Interceptor Prototype Aircraft.

 Entry last updated on 11/30/2016; Authored by Staff Writer; Content ©www.MilitaryFactory.com



  Alekseyev I-211  
Picture of Alekseyev I-211 Jet-Powered Fighter / Interceptor Prototype Aircraft


Despite an impressive design, the Alekseyev I-211 was limited by its under-performing turbojet engines and ultimately abandoned.

Like other global powers in the post-World War 2 period, the Soviet Union was hard at work at developing viable jet-powered fighter solutions. Semyon M. Alekseyev earned his stripes during the war as one of the primary people at Lavochkin and the company became responsible for such critical contributions as the LaGG-3, the La-5 of 1942, the La-7 of 1944 and the La-9 series. The Lavochkin brand became as well-known as any other in Soviet history before the end, joining such storied names as Mikoyan-Gurevich and Ilyushin in support of the air war against Germany.

Following the war, Alekseyev established Alekseyev OKB during September of 1946 and work immediately began on a new single-seat, twin turbojet-powered all-metal fighter-interceptor. The design mimicked some of what made up those desperate fighters being designed by German engineers in the late stages of World War 2: the fuselage was centralized and housed the avionics fit, fuel, and armament while the cockpit was fitted well-forwards and under a useful bubble-style canopy offering excellent all-around vision. A rounded nose cone was fitted at front and the fuselage tapered to the rear where a traditional tail unit was fitted. This unit featured a single vertical surface with mid-mounted horizontal planes. The wing mainplanes were, themselves, straight appendages - the spans driving through the engine nacelles which extended from the leading and trailing edges as in the British Gloster Meteor jet fighter series. The undercarriage was wholly retractable and of a tricycle arrangement - each leg double-tired for robustness.

The engine of choice became a Lyulka TR-1 axial-flow unit outputting at 3,010 pounds thrust. This engine was the first indigenous Soviet jet engine and was eventually fitted to only a handful of applications beyond the Alekseyev aircraft - the Sukhoi Su-10 and Su-11 designs both carried it. Development of the engine began during the war in 1944 and produced the "S-18" to which the "TR-1" became its operational designation. This powerplant was never to meet its lofty expectations but it was what was available to Soviet aeronautical engineers of the period.

Proposed armament for the fighter-interceptor was intended to be 3 x37mm cannons with 2 x 57mm cannons - giving the aircraft a considerable frontal array against enemy bombers. Due to issues throughout the life of the Alekseyev aircraft these guns were never fitted.

The initial version of the line to appear was the I-210 and this was fitted with 2 x Tumansky RD-20 turbojets, Soviet copies of the German wartime BMW 003 turbojet which were temperamental offerings limited in power. This model was not furthered as Lyulka finally released their TR-1 series engines for use and this produced the I-211 designation which made its maiden flight during the fall of 1947. However it was soon found that the TR-1 turbojets were under-performing which, in turn, made for a very heavy aircraft - particularly for one earmarked as a dogfighter - although handling was found to be sound despite the limited power available.

To offset the TR-1's limitations, Lyulka moved on their TR-1A turbojet which promised 3,318 pounds of thrust but before these could be used, Alekseyev had secured a pair of British Rolls-Royce "Derwent V" turbojets to begat the I-215 designation. Other variants of the line included the I-211S which featured swept wing and tail surfaces for improved aerodynamics. The I-215D was an I-215 offshoot ordered by OKB-1 and featured a "bicycle" undercarriage. The I-216 was a proposed heavy fighter offshoot based on the I-215 and armed appropriately with 2 x 75mm autocannons, these fitted to slightly modified wings.

As the TR-1A engines were ultimately discontinued due to high fuel consumption, Alekseyev sought to further the I-215 along its own lines. However, Stalin forced Alekseyev OKB to be disbanded following comments made during a Kremlin meeting. This ended all work on the I-211 and the related I-215 products - as such, neither aircraft was ever formally flight-tested en route to possible serial production.

Dimensions of the original I-211 included an overall length of 38 feet and a wingspan of 40.2 feet. Loaded weight was 15,200 pounds. Performance estimates were a maximum speed of 524 miles per hour, a range out to 962 miles, a service ceiling of 44,620 feet, and a rate-of-climb nearing 5,415 feet per minute.
Any available statistics for the Alekseyev I-211 Jet-Powered Fighter / Interceptor Prototype Aircraft are showcased in the areas immediately below. Categories include basic specifications covering country-of-origin, operational status, manufacture(s) and total quantitative production. Other qualities showcased are related to structural values (namely dimensions), installed power and standard day performance figures, installed or proposed armament and mission equipment (if any), global users (from A-to-Z) and series model variants (if any).
Alekseyev I-211 Specifications
National Flag Graphic
Soviet Union
Year: 1947
Type: Jet-Powered Fighter / Interceptor Prototype Aircraft
Manufacturer(s): Alekseyev OKB - Soviet Union
Production: 1
Supported Mission Types
Air-to-Air
Interception
Unmanned
Ground Attack
Close-Air Support
Training
Anti-Submarine
Anti-Ship
Airborne Early Warning
MEDEVAC
Electronic Warfare
Maritime/Navy
Aerial Tanker
Utility/Transport
Passenger Industry
VIP Travel
Business Travel
Search/Rescue
Recon/Scouting
Special Forces
X-Plane/Development
Structural
Crew: 1
Length: 37.86 ft (11.54 m)
Width: 40.19 ft (12.25 m)
Height: 12.14 ft (3.70 m)
Empty Weight: 9,612 lb (4,360 kg)
MTOW: 16,424 lb (7,450 kg)


Installed Power
2 x Lyulka TR-1 turbojet engines developing 3,010 lb of thrust each.

Standard Day Performance
Maximum Speed: 581 mph (935 kph; 505 kts)
Maximum Range: 482 mi (775 km; 418 nm)
Service Ceiling: 44,291 ft (13,500 m; 8.39 mi)
Rate-of-Climb: 5,415 ft/min (1,650 m/min)


Armament
PROPOSED (Never Fitted):
3 x 37mm cannons
2 x 57mm cannons


Operators List
Soviet Union

Series Model Variants
• I-210 - Original prototype with 2 x Tumansky RD-20 (BMW 003) turbojet engines; never flown.
• I-211 - Fitted with 2 x Lyulka TR-1 turbojet engines
• I-211S - I-211 model with swept wing and tail surfaces.
• I-215 - Revised I-211 with 2 x Rolls-Royce Derwent V turbojet engines fitted.
• I-215B - Revised I-215 with bicycle undercarriage arrangement.
• I-216 - Proposed heavy fighter with 2 x 75mm cannons in wings.


Supported Weapon Systems
Graphical image of an aircrat automatic cannon