Aircraft / Aviation Vehicles & Artillery Small Arms Warships & Submarines Military Ranks Military Pay Chart (2024)
Aviation / Aerospace

Yermolayev Yer-2

Medium Bomber Aircraft [ 1941 ]

The Yermoleyev Yer-2 is a little-remembered long-range medium-class bomber of the Soviet Air Force of the World War 2 period.

Authored By: Staff Writer | Last Edited: 05/21/2020 | Content ©www.MilitaryFactory.com | The following text is exclusive to this site.

Soviet aeronautics engineer Vladamir Yermolaev (1909-1944) served as the lead on what became the "Stal-7" aircraft under the Bartini (Robert Ludvigovich Bartini, 1897-1974) brand label in the pre-World War 2 (1939-1945) period. The twin-engine Stal-7 was developed into a single working prototype example intended to serve as a passenger airliner / transport to satisfy a standing commercial Aeroflot requirement. Due to its impressive performance in testing, this same design was selected for conversion into a twin-engine, long-range medium-class bomber under the "Yer-2" designation. Yermolaev went on to become chief operator of the "OKB-240" design bureau in 1939, taking over Bartini's position after he was sent to Siberia.

The Yer-2 was of relatively unique design form for its time with sleek, clean lines throughout. The fuselage was well-rounded and the nose section glazed with the cockpit position stepped. The fuselage tapered towards the tail unit in the usual way and the structure was capped by a split vertical tail fin component featuring separated horizontal planes. The wing mainplanes, of inverse-gull form (ala the German "Stuka" dive bomber), were low-mounted at the fuselage sides and curved at their tips. Each mounted a streamlined nacelle housing Charomskiy ACh-30B V-12 liquid-cooled diesel-fueled piston-driven engines of 1,500 horsepower each. The engines drove three-bladed propeller units of constant-speed design and contributed to the aircraft's top listed speed of 260 miles-per-hour. Range was out to 3,400 miles and the aircraft's service ceiling could reach just under 24,000 feet.

For point-defense, the bomber carried a single 12.7mm UBT series machine gun on a flexible mounting at the glazed nose position, a single 20mm ShVAK automatic cannon in a TUm-5 series dorsal turret emplacement at midships, and a single 12.7mm UBT heavy machine gun at a ventrally-positioned, rear-facing station. To satisfy its bombing requirement, the internal configuration allowed for up to 11,025lb of conventional drop ordnance / bombs to be carried.

The operating crew reached four personnel and the protruding cockpit flight deck was noticeable offset to portside while also being heavily glazed.

A first-flight in its "DB-240" prototype form (two were constructed, powered by M-105 engines of 1,050 horsepower) was recorded on May 14th, 1940 and service introduction followed in 1941 with serial production reaching between 360 and 370 total units. However, production was quickly halted in 1941 - following the German invasion of the Soviet Union through "Operation Barbarossa" in June - as other Soviet Air Force aircraft were to take priority. For its time in the Grand War, the series was put to good use by running sorties directly against the heart of the German empire - Berlin - while launching from bases in Soviet-controlled Estonia. Beyond this, the twin-engine platform was forced into low-level attack work as a tactical bomber for which it was never intended, resulting in unacceptable losses of men and machine alike. However, by this time, the Battle of Moscow was in full swing and any and all aircraft were pressed into whatever role they were needed for.

Yer-2 series bombers served in a frontline capacity into 1943 at which point attrition and obsolescence relegated the series as trainers for future Soviet airmen for the time being. That same year, with gains being made by the Soviets on the ground, serial production was allowed to restart and the bomber flew in its original role into the war's final weeks (April 1945). In all, the series was operated with Long Range Aviation of the Soviet Air Forces of World War 2 through squadrons 327, 329, 420, 421, 747, and 748. Final forms were not retired until well after the war, this being in or around 1950.


The DB-240 prototype pair laid the ground work for the production quality "Yer-2" to be realized, these powered by M-105 engines and production reached 128 total units. Then followed the one-off "Yer-2/AM-37" prototype fitted with 2 x Mikulin AM-37 engines of 1,380 horsepower while "Yer-2/M-40F" served as the basis for the diesel-engined variant (fitting 2 x Charomskiy M-40F units). This led to the "Yer-2/ACh-30B" serial production model which, while showcasing considerable performance increases over the original arrangement, suffered reliability problems.

At least two Yer-2/ACh-30B production aircraft were used as the basis for the "Yer-2ON", a VIP / passenger fast-transport. The "Yer-2N" designated a test article used to study the captured German Argus As 014 pulse jet engine at the end of the war and, similarly, "Yer-2/MB-100" was used to test the Dobrotvorskii MB-100 engine in 1945.

"Yer-4" designated a proposed, improved Yer-2 bomber form. Yer-2 production bombers were to be reworked with ACh-30BF engines providing increased power, given lengthened wings for improved handling, and fielding a better defensive scheme. However, only a prototype of this mark was ever realized and this was tested during 1943.

By this time, the war had moved on without the Yer-2 series as a focal point to future Soviet Air Force plans and its wartime story was more or less written in full.©MilitaryFactory.com
Note: The above text is EXCLUSIVE to the site www.MilitaryFactory.com. It is the product of many hours of research and work made possible with the help of contributors, veterans, insiders, and topic specialists. If you happen upon this text anywhere else on the internet or in print, please let us know at MilitaryFactory AT gmail DOT com so that we may take appropriate action against the offender / offending site and continue to protect this original work.


Service Year

Soviet Union national flag graphic
Soviet Union

Not in Service.


Yermolaev / Yermolayev OKB - Soviet Union
(View other Aviaton-Related Manufacturers)
National flag of the Soviet Union Soviet Union
(OPERATORS list includes past, present, and future operators when applicable)
Ability to conduct aerial bombing of ground targets by way of (but not limited to) guns, bombs, missiles, rockets, and the like.

53.9 ft
(16.42 m)
75.5 ft
(23.00 m)
15.8 ft
(4.82 m)
Empty Wgt
23,049 lb
(10,455 kg)
41,006 lb
(18,600 kg)
Wgt Diff
+17,957 lb
(+8,145 kg)
(Showcased structural values pertain to the base Yermolayev Yer-2 production variant)
Installed: 2 x Charomsky ACh-30B V-12 diesel-fueled engines developing 1,500 horsepower each and driving three bladed propeller units.
Max Speed
261 mph
(420 kph | 227 kts)
23,622 ft
(7,200 m | 4 mi)
3,418 mi
(5,500 km | 2,970 nm)

♦ MACH Regime (Sonic)
RANGES (MPH) Subsonic: <614mph | Transonic: 614-921 | Supersonic: 921-3836 | Hypersonic: 3836-7673 | Hi-Hypersonic: 7673-19180 | Reentry: >19030

(Showcased performance specifications pertain to the base Yermolayev Yer-2 production variant. Performance specifications showcased above are subject to environmental factors as well as aircraft configuration. Estimates are made when Real Data not available. Compare this aircraft entry against any other in our database or View aircraft by powerplant type)
1 x 12.7mm UBT Heavy Machine Gun (HMG) on trainable mounting in nose position.
1 x 20mm ShVAK automatic cannon in dorsal turret seated over midships.
1 x 12.7mm UBT HMG on trainable mounting at ventral, rear-facing position.

Up to 11,025lb of conventional drop bombs held in an internal bomb bay.

Supported Types

Graphical image of an aircraft medium machine gun
Graphical image of an aircraft heavy machine gun
Graphical image of an aircraft automatic cannon
Graphical image of an aircraft conventional drop bomb munition

(Not all ordnance types may be represented in the showcase above)

Yer-2 - Base Series Designation; definitive production form; powered by 2 x M-105 engines; 128 examples completed.
DB-240 - Prototype designation; two examples completed.
Yer-2/AM-37) - One-off development with Mikulin AM-37 engines of 1,380 horsepower.
Yer-2/M-40F - Developmental model fitted with Charomskiy M-40F diesel engines.
Yer-2/ACh-30B - Diesel-engined production models.
Yer-2ON - VIP / passenger fast-transport; two converted from Yer-2 production stock.
Yer-2N - One-off Argus As 014 pulse jet testbed.
Yer-2/MB-100 - One-off Dobrotvorskii MB-100 engine testbed.
Yer-4 - Proposed improved Yer-2 bomber with ACh-30BF diesel engines, lengthened wingspan, increased power / performance, and enhanced defensive scheme; not produced.

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 pioneering aircraft
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 representing modern aircraft
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 Ukranian-Russian War
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 War
Military lapel ribbon for experimental x-plane aircraft

Images Gallery

1 / 1
Image of the Yermolayev Yer-2
Image from the Public Domain.

Disclaimer | Privacy Policy | Cookies

2024 Military Pay Chart Military Ranks DoD Dictionary Conversion Calculators Military Alphabet Code Military Map Symbols

The "Military Factory" name and MilitaryFactory.com logo are registered ® U.S. trademarks protected by all applicable domestic and international intellectual property laws. All written content, illustrations, and photography are unique to this website (unless where indicated) and not for reuse/reproduction in any form. Material presented throughout this website is for historical and entertainment value only and should not to be construed as usable for hardware restoration, maintenance, or general operation. We do not sell any of the items showcased on this site. Please direct all other inquiries to militaryfactory AT gmail.com. No A.I. was used in the generation of this content; site is 100% curated by humans.

Part of a network of sites that includes GlobalFirepower, a data-driven property used in ranking the top military powers of the world, WDMMA.org (World Directory of Modern Military Aircraft), WDMMW.org (World Directory of Modern Military Warships), SR71blackbird.org, detailing the history of the world's most iconic spyplane, and MilitaryRibbons.info, cataloguing military medals and ribbons. Special Interest: RailRoad Junction, the locomotive encyclopedia.

©2023 www.MilitaryFactory.com • All Rights Reserved • Content ©2003-2023 (20yrs)