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Alekseyev I-211

Soviet Union (1947)
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.


Detailing the development and operational history of the Alekseyev I-211 Jet-Powered Fighter / Interceptor Prototype Aircraft.  Entry last updated on 5/15/2018. Authored by Staff Writer. Content ©www.MilitaryFactory.com

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.






Our Data Modules allow for quick visual reference when comparing a single entry against contemporary designs. Areas covered include general ratings, speed assessments, and relative ranges based on distances between major cities.

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Relative Maximum Speed Rating
Hi: 750mph
Lo: 375mph
    This entry's maximum listed speed (581mph).

    Graph average of 562.5 miles-per-hour.
City-to-City Ranges
NYC
 
  LON
LON
 
  PAR
PAR
 
  BER
BER
 
  MOS
MOS
 
  TOK
TOK
 
  SYD
SYD
 
  LAX
LAX
 
  NYC
Graph showcases the Alekseyev I-211's operational range (on internal fuel) when compared to distances between major cities.
Aviation Era
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Unit Production Comparison
Comm. Market HI*: 44,000 units
Military Market HI**: 36,183 units
1
1


  * Commercial Market High belongs to Cessna 172.

  ** Military Market High belongs to Ilyushin Il-2.


Altitude Visualization
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Origin: Soviet Union
Year: 1947
Type: Jet-Powered Fighter / Interceptor Prototype Aircraft
Manufacturer(s): Alekseyev OKB - Soviet Union
Production: 1
Status: Cancelled
Global Operators:
Soviet Union
Historical Commitments / Honors:

Military lapel ribbon for Operation Allied Force
Military lapel ribbon for the Arab-Israeli War
Military lapel ribbon for the Battle of Britain
Military lapel ribbon for the Battle of Midway
Military lapel ribbon for the Berlin Airlift
Military lapel ribbon for the Chaco War
Military lapel ribbon for the Cold War
Military lapel ribbon for the Cuban Missile Crisis
Military lapel ribbon for the Falklands War
Military lapel ribbon for the French-Indochina War
Military lapel ribbon for the Golden Age of Flight
Military lapel ribbon for the 1991 Gulf War
Military lapel ribbon for the Indo-Pak Wars
Military lapel ribbon for the Iran-Iraq War
Military lapel ribbon for the Korean War
Military lapel ribbon for the 1982 Lebanon War
Military lapel ribbon for the Malayan Emergency
Military lapel ribbon for the attack on Pearl Harbor
Military lapel ribbon for the Six Day War
Military lapel ribbon for the Soviet-Afghan War
Military lapel ribbon for the Spanish Civil War
Military lapel ribbon for the Suez Crisis
Military lapel ribbon for the Vietnam War
Military lapel ribbon for Warsaw Pact of the Cold War-era
Military lapel ribbon for the WASP (WW2)
Military lapel ribbon for the World War 1
Military lapel ribbon for the World War 2
Military lapel ribbon for the Yom Kippur
* Ribbons not necessarily indicative of actual historical campaign ribbons. Ribbons are clickable to their respective campaigns/operations.
Measurements and Weights icon
Structural - Crew, Dimensions, and Weights:
Unless otherwise noted the presented statistics below pertain to the Alekseyev I-211 model. Common measurements, and their respective conversions, are shown when possible.

Operational
CREW


Personnel
1


Dimension
LENGTH


Feet
37.86 ft


Meters
11.54 m


Dimension
WIDTH


Feet
40.19 ft


Meters
12.25 m


Dimension
HEIGHT


Feet
12.14 ft


Meters
3.7 m


Weight
EMPTY


Pounds
9,612 lb


Kilograms
4,360 kg


Weight
LOADED


Pounds
16,424 lb


Kilograms
7,450 kg

Engine icon
Installed Power - Standard Day Performance:
2 x Lyulka TR-1 turbojet engines developing 3,010 lb of thrust each.

Performance
SPEED


Miles-per-Hour
581 mph


Kilometers-per-Hour
935 kph


Knots
505 kts


Performance
RANGE


Miles
482 mi


Kilometers
775 km


Nautical Miles
418 nm


Performance
CEILING


Feet
44,291 ft


Meters
13,500 m


Miles
8.39 mi


Performance
CLIMB RATE


Feet-per-Minute
5,415 ft/min


Meters-per-Minute
1,650 m/min

Supported Weapon Systems:

Graphical image of an aircrat automatic cannon
Armament - Hardpoints (0):

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