Beriev MBR-2, part two

 

The Beriev MBR-2bis was an improved version of the regular MBR-2 with a Mikulin AM-34N engine, instead of the original M-17 one. The AM-34N engine could deliver up to 750 hp of power and drove a two-bladed propeller. The MBR-2bis' fuselage was also modified to have an enclosed cockpit, a dorsal gun turret and an enlarged vertical fin. Around 750 units of this variant were manufactured between 1935 and 1940 (some sources claim it was until 1941 though) at aircraft factory No.31, located in the city of Taganrog. 

The first combat usage of the MBR-2bis was in 1938 during the Battle of Lake Khasan. Some MBR-2bis of the Soviet Pacific Fleet stationed in Vladivostok, took off to harass Japanese troops involved in the fighting. 

During the whole Winter and Continuation Wars, the MBR-2 and MBR-2bis belonging to the Soviet Baltic Naval Aviation were thoroughly employed during both conflicts, by both sides as up to five machines, both MBR-2 and MBR-2bis were captured by the Finns, who employed them in various roles, among them anti-submarine patrols, scout, rescue operations and propaganda leaflet bombing in the area of Lake Ladoga. 

They were also widely employed during World War 2, specially on the Black Sea, where they suffered heavy losses because of their weak defensive armament. In 1943 an MBR-2bis of the Caspian flotilla bombed the building of the Communist Party at the city of Elista, in the Kalamyk Autonomous Soviet Socialist Republic, when the city was occupied by the Germans, as it was serving as the headquarters for a German division. This attack was emblematic at its time, and was highly propagandised by the Soviet authorities. 

The last operational use of the Beriev MBR-2bis during World War 2 was during the Soviet Invasion of the Southern part of the Sakhalin Island, in August 1945. 

It's reported that when the Democratic People's Republic of Korea (DPRK - AKA North Korea) was established in September 1948, an unknown number of MBR-2bis was supplied to the newly created North Korean Air Force. Any further report of the MBR-2 in North Korea is unknown, they were probably destroyed during the course of the Korean War, and, as we couldn't find graphical information about it, the drawing should considered as speculative. 

Additionally, the MBR-2bis was also used by Aeroflot in various aerial routes all along the USSR until the late 1940s. 

One machine was experimentally fitted with a Mikulin M-103 engine which drove a three-bladed propeller and served as the basis for the more advanced, though unsuccessful albeit not because of technical reasons, Beriev MBR-7.

Sources:

1. https://en.wikipedia.org/wiki/Beriev_MBR-2

2. https://ru.wikipedia.org/wiki/МБР-2 (translated)

3. https://www.valka.cz/Berijev-MBR-2-M-34-kod-NATO-Mote-t102680

Mitsubishi Ki-51

The Mitsubishi Ki-51 was a Japanese light bomber which, in the inmediate post-war, served with many nations.

• China: After the Japanese withdrawal from mainland China tons of equipment were left behind. Both communist and nationalist armies took them and pushed them into service. They served through the late stages of the Chinese Civil War, in the post 1945 period. Apparently, initialy the nationalists captured them, but they were soon captured by the communists some time after 1945 and after the war they were kept in service by the People's Liberation Army's Air Force until 1953. 
•  France: As the Ki-51 was mainly used in the China-Burma-India Theatre of Operations, many of them were left behind in Indochina. After the Japanese withdrawal, local French authorities pushed some few of them into service (as most of them were damaged or derelicted beyond usage) and used them occasionaly in the First Indochina War in the liaison role, which, not in vain, they were assigned to a liaison squadron. 
• Indonesia: The Indonesian People's Security Force (IPSF), which was the Indonesian anti-Dutch militia that fought for independence, captured a small number of Ki-51s at numerous Japanese bases being the bigger one the one located at Malang, named Bugis Air Base which was evacuated on 18th September 1945. Most of the aircrafts were destroyed in the subsequent Indonesian Independence War which lasted from 1945 until 1949. It's known that at least one Ki-51 bombed Dutch troops on 29th July 1947.
• Democratic People's Republic of Korea: As Manchuria and Korea were important Japanese bases, after the USSR invaded in August 1945, they captured lots of Japanese equipment which, compared to Soviet ones, they were very outdated. As most of them were concentrated both in Harbin (capital of Manchuria), Port Arthur (nowadays Dalian) and Pyongyang, (which before the proclamation of North Korea was an important hub in the region) when the Democratic People's Republic of Korea (AKA North Korea) was proclaimed on 9th September 1948, Soviet authorities allowed the newly Republic to have some Ki-51s. They were most probably used in the opening stages of the Korean War, however, most likely, they were destroyed soonly after. Anyway, we couldn't find any graphical evidence about them, the profile should be taken with a grain of salt.

Sources:

1. https://en.wikipedia.org/wiki/Mitsubishi_Ki-51

2. https://www.militaryfactory.com/aircraft/detail.asp?aircraft_id=892