Development of front-line bomber Tu-2 began in 1940 prototype (“103”) built with two engines AM-37. The first flight took place in January 1941 On it during the tests managed to get the settings close to the fighters of those years, but the air force demanded to accommodate the pilot and Navigator in a cabin-type German Ju 88 and mounted under a wing brake grids. The new four-seater has received the designation “103У”. Due to the outbreak of the war she remained in the experimental instance.
Tu-2
The appearance of the first combat aircraft was not immediately made adjustments to the fighting at sea. In world war I the sky over the sea rarely harbored a threat to warships. However, in the next world war, the aircraft were able to effectively fight with the battleships and cruisers, and submarines. And the next decade put the surface fleet of all countries faced with a tough choice — either the ships will be able to repel the aircraft and only appeared guided missiles, or they will go to the scene as an independent fighting force. Hence it is understandable the enthusiasm of the Americans, which in the 1950s they began to equip their ships a variety of anti-aircraft and first missiles.
Perhaps it can be called the first and most accessible for a child flying a model made with their own hands. And really to make a paper dove will not require any tool or special materials — just take the conventional typewritten sheet and some times it is to bend. Here’s how the baby should be show at least once: the second time he will easily repeat these simple steps for himself. When the child firmly mastered the original version — he wants the dove to fly better. And then let him in on a little secret.
The car was built in the days when I realized that the promised “reformers” two cars in exchange for vouchers, not only to me but also most Russians have never get. While we had to work more, and life became worse. On the salary they were paid very irregularly, could not buy a car. But it was necessary to survive. The hope remained only on the earth-mother — only she could help. But the suburban area was far outside the city, and get to it there is nothing.
Designers snowmobiles know that linking directly to the crankshaft of the engine and the propeller is unprofitable: too high engine speed do not allow to use aredigital optimally. To reduce the propeller revolutions Amateur designers use chain gear, ploskostopie belts, banded V-belt transmission. You can meet the most reliable and compact single-stage gear reducers. As a rule, however, they are quite complicated. The most simple design managed to develop one of the enthusiastic Amateur “aerosanitary” from the city of Tchaikovsky, Perm region M. Psarev. On the processability of the mechanism at least tells TC that he “produced” a kind of microseries — was repeated at least five times. Today we introduce you to drawings and manufacturing technology of the gear.
31 October 1945 the technical Department of the Us air command (the name of the U.S. air force) requested the leading firms, they create new weapon systems capable of hitting targets at ranges from 40 to 8000 km.