American Douglas aircraft company was founded in 1921 by aircraft Donald Wills Douglas. Among the first aircraft issued by the firm were the torpedo bombers, passengers, mail and transport machine. One of the landmark cars of the company became the passenger all-metal aircraft with retractable landing gear DC-3 (military version C-47), issued in the amount of more than 10 thousand copies.
EASY STEP
Prolonged work on ladders tiring because you have to stand “like a chicken on the roost” — to narrow the crossmember. I made a hinged step box shape with two hooks that it hung on the corresponding cross member of the ladder: work on it incomparably easier. B. DUHNEVICH, gardeners
Numerous family water bikes added another interesting machine designed by our reader — engineer G. Ovchinnikov from Dnepropetrovsk. Ovchinnikov — motorist. Therefore, the main task for himself, he put the establishment of such a water bike which can be transported to krasivom the trunk of the car.
Many owners of motor scooters “Tourist” doing to them side trailers or converted them into tricycles. For such machines, I suggest to add another speed back. In some cases, not hurt it, and the two-wheeled machine.
The rapid construction of the armed forces began in Germany with the rise to power of Adolf Hitler. Moreover, all types of weapons developed in accordance with far-reaching plans of the führer for the establishment of a new world order.
The peculiarity of the proposed model rocket class “Hawk” — the displacement of the wing at takeoff. As this increases the area of the tail section, shifting the center of pressure of the model. The eye receives greater stability in flight with the engine running.
After our magazine began to publish materials about motonartah, created by enthusiasts of technical creativity, the number of such vehicles built by Amateurs has increased dramatically. Many of them according to their operating characteristics, reliability and original design solutions of individual units are not inferior to motoneta by the industry. It fans belongs priority in the use of metal tracks instead of rubber, which become unusable at low temperatures; it has conducted a number of experiments with different wheels (spiked wheels, screws, conical paddle wheels, multi-tracks, etc.).
Start 30-ies was a time of rapid development of Soviet gliding. The newly constructed plant produced serial training gliders and sent them to all parts of the Soviet Union for gliding schools, stations and groups.
Not an easy job, manually to collect in the forest cones pine nuts. In addition, because the cones themselves, not the nuts. They need to be removed and this is done with the help of the machines installed at the collection points. However, the “output” of the nut of the bumps is small, so it turns out that for hundreds of miles to the collection point and deliver something that goes to waste.