By the middle of 1950-ies the main front-line reconnaissance aircraft was considered to be Il-28R. But the car, excellent in all respects, by the time against the backdrop of recent supersonic fighters became morally obsolete. Created at the same time, the Yak-25P, although outnumbered, “Il”, but the requirements of the military on the prospective scout is also not satisfied. In this situation, OKB A. S. Yakovlev proposed to develop a supersonic fighter-scout with engines AM-9F (RD-9F). The government and the military supported the proposal and in March 1956 was signed the corresponding decree.
FIGHTER RECONNAISSANCE Yak-27R
At the initial stage of the Second world war, tasks of intelligence in the interest of armored and motorized units of the Wehrmacht did pretty well armored. Their use in this role was promoted as an extensive road network of Western Europe, and the absence of the enemy’s massive anti-tank defense (PTI).
For the rational use of weeds and grass-tops in gardens or allotments of their composted in pits or small towers. I’m doing this: throwing a wooden greenhouse in a box without a bottom size 2000X1000X400 mm.
Under the terms of the competition model rockets must stay in the air for Some time, and it makes rocketmodeler to look for different Methods of forced landing. Very interesting designed and a mug of rocket and space modeling the pioneers of the town of Krasnozavodsk. It allows you to limit the time of flight depending on the conditions of the competition.
In the 1970 – 1980s, Soviet designers created the powerful jet system of volley fire MLRS, the superiority of which was recognized by military professionals worldwide. Under their influence, many States were later developed by modern samples of this powerful weapon.
Historians say that the sail appeared on land about four thousand years ago! Fiction? No – there is documentary evidence. In 1953 the Italian archaeological expedition at the excavations of the temple of Ptolemy near the town of Medinet MADI discovered the remains of the ancient land of the sailing ship. Designed and manufactured it was under the leadership of the Egyptian Pharaoh Amenemhet III (1849 – 1801 BC). It was a rook, which floated on the Nile at first, and then mounted on four wooden wheels. Two four-meter mast stretched colored sails. The inscription found in the desert of basalt polished slab read: “Pharaoh Amenemhet III traveled from here across the desert to Medinet in a sailing boat driven by the wind.”
In one of the winters, according to the Central television, only in Ekaterinburg more than 50,000 residents were injured when falling during icy conditions. And how many car accidents occur due to ice on the roads? However, the wheels of cars for a long time, metal spikes. Why not do something like that in heels?
A distinctive feature of this model of rocket plane is turning the wing. It is set along the fuselage, which eliminates any possibility of the appearance of the spiral during takeoff.
The process of establishing electronic circuits the most exciting and interesting, but also the longest, sometimes bringing a lot of grief for Amateurs due to the lack of reliable power supply. After all, the battery or the battery do not serve indefinitely — they are discharged. Changes frequently and the line voltage. And each scheme is designed for a specific voltage. Changing it degrades the operation of the entire electronic device.
On the fronts of world war II in the fighting military units along with various armored vehicles involved and light tanks. It is known to our T-26, T-60, T-70, the American M3 and M5, the German PzKpfw I and PzKpfw II. However, the commanders of the opposing sides after some time came to a disappointing conclusion, considering them unfit for action due to relatively weak weapons, and insufficient armor protection. Therefore, in 1943 the production of light tanks was stopped in all countries except the USA, where the M5 was produced in 1944.