Drones continue to explore the underwater space. On February 7, the press service of the Defense Advanced Projects Agency (DARPA) of the US Department of Defense announced the signing of contracts for the development of underwater unmanned vehicles.

Japan is in hysterics: Russia has allowed itself another military exercise on the Russian Kunashir with artillery firing. The Japanese Foreign Ministry protests: "You can't!". In the comments of some Japanese, too, there are hysterical and even militant notes. But many say that the islands of Japan can not be returned. And they blame the Japanese authorities for everything.

Over the past two days, it has become clear that with the coming to power of the Joe Biden administration in the United States, American foreign policy has radically changed. The previous principles of the relative isolationism of the previous American leader, Donald Trump, are thrown aside.

The complete defeat of the army and the surrender of the capital on the fourth day of the war-the Polish generals tried to simulate an attack on Poland from the east. The exercises ended in a complete failure — even the latest American military equipment did not help the defenders. Why the Polish Army forgot how to fight — in the material of RIA Novosti.

The head of the Pentagon, Lloyd Austin, will review the deployment of American troops abroad and suspend the withdrawal of army units from Germany. This was announced by US President Joe Biden on February 4, in a keynote speech at the State Department. The speech was broadcast on the official page of the President of the United States on Twitter.

Russia in the next two years does not plan to create a fifth-generation fighter-interceptor MiG-41, such information is reported by military expert Peter Butovsky in the American magazine Aviation Week & Space Technology.

The Ministry of Defense of Belarus in October 2022 may receive the second batch of Su-30SM aircraft produced by the Russian corporation "Irkut", consisting of four pieces of equipment, the press service of the military department of the republic reported.

A line of piston engines for unmanned aerial vehicles will be created in Russia within five years. They will also receive attack drones.

The fact that there are currently no engines for attack drones in Russia is one of the reasons for the country's lack of its own serial attack drones. This is reported by RIA Novosti, referring to an interview with the General Director of the Central Institute of Aviation Engine Building Mikhail Gordin.

As reported on February 5, 2021, the Ministry of Defense of Kazakhstan, test flights of the new reconnaissance unmanned aircraft complex "Shagala"took place. The UAV was developed by military scientists of the National Defense University of Kazakhstan named after the First President of the Republic of Kazakhstan - Elbasy (NUO).

A production aircraft with an all-electric powerplant may appear by 2030, according to Andrey Dutov, General Director of the N.E. Zhuklovsky Institute Research Center.

Russian engineers have started ground testing of a flying laboratory based on the Yak-40, equipped with a superconducting electric motor. It is installed in the nose of the aircraft.

Mass production of biofuels for aviation is less cost-effective compared to the production of aviation kerosene from oil. Therefore, without the introduction of a carbon tax, it is not able to compete with traditional jet fuel, said Jay D. Kiesling, professor of chemical engineering and bioengineering at the University of California, Berkeley, deputy director of the Biological Sciences Laboratory at the Lawrence Berkeley National Laboratory, chief Executive Officer of the Joint Institute for Bioenergy, in an interview with Global Energy.

For a week, more than 30 aircraft and unmanned aerial vehicles conducted reconnaissance near the borders of Russia. The activity of foreign aircraft was detected by Russian air space control systems.

Earlier, the general director of the Khrunichev Center, Alexey Borochko, said that the third test launch of the heavy launch vehicle "Angara-A5" is scheduled for the second quarter of 2021

The Khrunichev Center has received several orders for the launch of the Angara-A5 heavy launch vehicle, in particular for 2022. This was stated by the chief designer of NPO Energomash (part of Roscosmos), Pyotr Lovochkin, on Saturday in an interview with the program " Big Space "on the channel" Roscosmos TV " on YouTube.

For the first time, Russian specialists have designed a rocket engine without using paper drawings. In the future, it is intended to be used on the new Irtysh rocket, also known as the Soyuz-5.

The Indonesian telecommunications satellite Telkom-3, launched into a non-calculated orbit by the Russian carrier rocket "Proton-M", collapsed. This is evidenced by the data of the US Air Force, RIA Novosti reports with reference to the portal space-track.org.

[b]The Chinese National Space Administration reported that it is located at a distance of about 1.1 million km from this planet and 184 million km from Earth.]

The unmanned spacecraft of the People's Republic of China "Tianwen-1" successfully made the fourth correction of movement on the way to Mars. As reported on Friday by the Chinese National Space Administration, it is located at a distance of about 1.1 million km from this planet and 184 million km from Earth.

Russia is creating the world's first anti-tank missile system capable of shooting down drones. On the air of Sputnik radio, military expert Vadim Kozyulin told how difficult the task is to be solved by engineers and designers.

On February 4, 2021, China successfully conducted tests to intercept a medium-range ballistic missile at the Korla test site in the Xinjiang Uygur Autonomous Region.