For lifting of drinking water from boreholes and wells, often used external centrifugal pumps of the type “don” or “Kama”. It is a reliable and high-performance mechanisms, but they have their Achilles ‘ lie — backflow valve which keeps well enough in the system water during the period when Kasos does not work. As a Read more…
This is a hovercraft I built for several years. Engine – from VAZ-2108 with a capacity of 74 HP, Case – fiberglass, fiberglass epoxy resin, is made of the type “sandwich” with the Styrofoam plates. The structure weight was about 370 kg. propeller – propelling three-bladed, with a diameter of sweeping the surface 1700 mm and variable in place of step. There are still two the blower for pressurization of the airbag. Skirt the cushions are made from French awning waterproof material with a density of 600 g/m2.
We offer young athletes like high-speed cord combines the experience gained in this kind of automodelisme in recent years. Sorpresa design is logical from the point of view the sole purpose of achieving the highest speeds, that is, turning the aircar “Frank” sportsread. But if to argue from the point of view of an engineer, simplicity is the evidence of correctness of the choice of scheme design and, if it reaches the desired result.
Bike, perhaps the most common vehicle. And the fact that the most economical — there is no doubt that only two sandwiches to two hours to pedal. But is it possible to increase the efficiency of the human “engine”? With the reduction of spending “fuel”, nothing happens. Friction and the weight of the machine is reduced almost to a minimum. There is also a “box of speeds” the device for changing the gear ratio by switching the circuit to a small or large sprocket. It remains only to lengthen the levers of the pedals, but experts adamantly claim that their optimal length — 170 mm.
This foldable trolley took me to carry inflatable boats. The one sold in stores, takes a lot of space, and keep it in a rubber boat is very nice and stick out of the wheel, and cargo area, and its emphasis. My truck is all going, making it very compact. Now she’s well positioned in the pouch under the inflatable boat; the boat to her place. Storage is also convenient: it just hangs on the wall. Several options hinged and sliding knots fixed in the working and folded, was made in metal. The most reliable was the last that showed his successful three-year operation. However, the load more than 32 kg to carry was not necessary.
It is believed that his first sortie in world war II Corsair fighter made on 12 February 1943. On this day a dozen of these aircraft from squadron VMF-124 arrived at Henderson airfield and immediately engaged in military work. Twice the aircraft rose into the air to accompany the group patrol bomber PB4Y-2 Privateer, which struck at Japanese ships. Both departure went smoothly thanks to the fact that the Japanese aviation special activity did not show.
Houses of this design are popular with gardeners, they are simple and affordable to build; a set of materials required for each, cheap enough; moreover, this two-storey cottage has a very original and attractive appearance.
Quick-drying underwear in the kitchen over the gas stove, but there comes a time dining, and hanging over your head, it begins to deliver visible discomfort. And fresh cloth easily absorbs odors. Use of balcony (if any) is not always possible. This is why one of the most suitable for drying seats in the house is the bathroom.
One of the main problems faced by the Amateur constructor engine aircraft — selection or production of the power plant the necessary power, weight and efficiency. This problem is solved normally, on existing capacities and experience of building such units.