The Polish campaign of 1939 forced the military leadership of the Wehrmacht to equip the troops of the mobile means of combating enemy tanks. In the same year the firm “, Alkett” created the first self-propelled anti-tank artillery. The developers did is quite simple: they took off with a light tank Pz.Kpfw.I tower, and in its place hoisted a bridge with a 47-mm anti-tank gun Czech A9.
To make the tension spring is easy: a tight navit wire round rod — coil to a coil. However, a spring working in compression, this technology is not suitable: between its coils must be a certain distance. In this case, help out a bolt of the correct size. Stacking wire into the threaded groove, we Read more…
The electric shavers mesh head a lot of supporters who prefer their options with rotating knives. However, the thickness of the mesh is so small that it is quite fast in some places rubbed in the most unexpected moment. To get out of a situation when there is no replacement at hand, will help any Read more…
In Zlata Praha on the steep left Bank of the river Vltava, there is a strict gray building. The Czechoslovakian national technical Museum — one of the richest museums of history of technology in the world. This year the Olympics celebrates its 70th anniversary. At first the Museum consisted mainly exhibits private collections: scientific instruments, antique clocks. Then came the first steam engines, cars, airplanes. Particularly active exposure began to grow in the postwar years. Today it contains around a million items, many of which are donated to the Soviet museums.
The originality of this tool is that you can work with him with one hand. Dignity, which is quite appreciated by homebrew: there are plenty of places where conventional two-handed drill unfold. Replacing the drill bit on the screwdriver tip, you can get a screwdriver-bitreverse. The case of drills made of a conventional clamp: it Read more…
Sometimes it is difficult to remove on finger tight ring, but much harder — pressed on the shaft bushing or bearing, Not accidentally creating a variety of devices. One of such devices is presented at the NTTM-78 innovator Vladimir Gusev. His puller is very simple and is intended for locksmith’s and repair work — for example, the removal of the bearings from the shaft of the motors. Crank handle with screw case, with the teeth pull the chain and the gripper bar are all a device this portable remover. For adjustment of grippers for various diameter bearings or dismantling of the cross member bushings are supplied with screws.
privernuty screws to a wooden cube, to help you quickly and accurately to solder the two conductors.
For the manufacture of parts for models of artillery and torpedo armament of the marine models usually spent a lot of time, it is not always possible to achieve full similarity. Some of the devices and techniques that facilitate the machining of parts and reduces their production.
Pipes of heating are laid, usually near the walls, and even along corners. On the reverse side is difficult not only to paint them, but even control the quality of work. To tighten the pipe enough to use to control a small mirror, and to eliminate flaws — pad of foam sandwiched in “crocodile”. Read more…
In front of you a drawing of a simple model with electric motor and propeller. The real boats of this type are used in shallow rivers where conventional marine propeller can be damaged. Model making used popular material is Styrofoam. It is very easy and well handled. It can be cut with termoresta (see “M-K” № 3, 1978, p. 47), as well as a jigsaw, hacksaw or thin sharp knife. The processing done by plane or blade from a safety razor and a glass cloth. When gluing or painting you cannot apply substances containing acetone or nitrobacteria, as they spoil the foam.