Tupolev SB aircraft was conceived as a bomber, overtaking fighters. It was natural to create a heavy fighter, designed primarily to combat the bombers. Total produced three prototypes of the SB. According to the decision of the meeting of February 14, 1934, one of them got American motors “Cyclone”, another French Hispano-Suiza, and the third was going to keep in reserve in the form of a set of units. Three days later appeared a decree of the Council of labor and defense (STO), which stated that the third prototype of SB should be equipped with the type of engine, which is better to manifest themselves on tests.
SB CANNON
One of the most interesting pages in the history of world tank development was, without doubt, the period of creation towered tanks. He covered almost all of the 1920-ies that is not accidental, because the whole concept of mnogobashenniye schema is a logical continuation of the scheme British tanks during the First world war. English diamond machines were created to break through the defensive positions of enemy infantry, therefore, the location of the main weapons in side sponsons seemed quite obvious. When crossing the defensive lines so it was easier to kill the enemy infantry, entrenched in the trenches. Shots were fired from both sides along the trenches. In the process of transition to tower layout, which was apparent at the final stage of the First world war, the scheme with the placement of the weapons in the sponsons transformed into mnogobashenniye.
Experimental aircraft D-558-I. In late 1944 the Douglas firm received an order to develop an experimental aircraft with a turbojet engine. The main goal of this project was to obtain information about the aerodynamic loads, stability and controllability of the aircraft at transonic speeds. These data were to complement the information obtained in the course of implementation of the programme of tests of a supersonic aircraft X-1. In accordance with the specification developed by NACA (national Advisory Committee for Aeronautics) the aircraft was to take off from the aerodrome, to gain height from 6000 to 10,600 m, within 10 minutes to fly at transonic speeds and then return to the airfield.
Training U-2 aircraft – single-engine biplane of wooden construction with fixed landing gear, was designed at the factory number 1 in Moscow under the leadership of H. H. Polikarpov. His first version took off in the beginning of 1927, the Basis for the series was the second option, took to the air July 1, 1928
The story began during the Second world war. The command of the Wehrmacht, faced at the first stage of hostilities with a large number of Soviet light armored vehicles – tanks BT, T-60, T-70 and armored vehicles, and with our attacking aircraft, especially with the armored attack aircraft Il-2, decided to supply the troops of the 30-mm gun of high destructive power and long range of fire. According to the plan, such weapons must be effective to act on the objects directly on the battlefield, but also at air targets.
An Italian bomber FIAT BR.20 Cicogna. Italian aircraft FIAT BR.20 Cicogna (Italian. — AIST), created in the prewar years, engineer, Celestino Rosatelli, differed from the other two-engine bombers in service with the Italian air force. He had a successful design was completed with the most modern equipment and could carry an impressive bomb load. Combat patrol bomber began in the skies of Spain and ended with the end of world war II on the allied side of Germany, the Italian air force.
We left Royal Navy under development hollandska-Spirovska submarines of the first generation. This series of nameless boats revealed both advantages and disadvantages of the first Maritime powers of the world in a completely new shipbuilding. The first, of course, include the speed with which built submarines. Here, the shipbuilders of Britain showed their best side. Despite the fact that I had to produce a fundamentally new boats, the timing was very compressed and the quality is very high.
Developing the concept of training plane DH.60, John. De Havilland has created a new aircraft of the same class – DH.60T. He was distinguished by a reinforced airframe, a modified biplane gearbox and motor “Gypsy” lll (120 HP). After releasing a small series of DH.60T went into production DH.82 with the increased chord of the lower wing. The first flight of a machine called “tiger moth”, was held on 26 October 1931
1942 the British General staff attended to the question: “How should a heavy “assault tank”, able without harm to themselves to act at the head of the offensive orders troops?” At that time, the military command has developed a new concept of development of armored forces, and I must say that attempts to give an exhaustive answer quickly laid down on paper in draft form. There are several development machines, for example, АТ33 “Exelsior”, АТ38 “Valiant”, but in most cases, more drawings have been done.