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.
CLEARANCE WILL NOT BE
Screwed metal area with a rubber Mat to the table top washing and chopping kitchen table, it is possible to eliminate a gap between a wall and furniture.
Soldering metal tin solder — one of the most common but, unfortunately, the connection is not too strong. A more reliable seal provide so-called “hard” solders — silver-copper or copper-zinc. Most often, when brazing use a gasoline blowtorch. However, they should be treated skillfully: the lamp is unsafe in the fire relation, smokes when running, the flame is poorly adjusted.
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.
A simple device developed by members of the self-similar circle of Ufa city Palace of children’s creativity, shoal be useful to many tracks. It makes it very easy to create a miniature race track for sea trials models. We have seen this, having tried it, in fact: “digging,” grooves on a track is accelerated many times over.
Almost twenty years of experience in the design obsut Chernihiv circle of agricultural modeling. Over the years the students under the guidance of their mentors have designed and built many useful machines, mechanisms and devices, many of which have economic value and bring real benefits to the collective field. One of such devices — a device for the thermal treatment tick bees.
Every radio Amateur knows that without a source of constant and alternating stresses of different magnitudes in practical work is not enough. He needed to establish radiocontrole, repair equipment, charge batteries, test the motors and relays, to conduct physical experiments. All this is possible to do with a universal power supply, which we offer to the readers.