MODEL CONSTRUCTION

“PEAR” WITH THE SINKER

04.06.201813.05.2018Good recommendations

An important detail of the toilet tank — the so-called “pear”, covering the outlet. If its walls are deformed, it will not seal against the seat and close the drain hole. In this case, it makes sense to use “pear”— to put on a wire pull several large nuts.

ONCE AGAIN, THE “PISTONE”

04.06.201813.05.2018World of models

Article V. Minakova, “Secrets of the new “piston”, published in the “Modeller-designer”, No. 12 1994, aroused great interest among rocketmodeler. It is available for the first time in a popular form expounded basic principles of development and manufacture of gas-dynamic starting unit (GDU).Today we can offer the attention of randomdevice the research summary starts with DGG athletes from the Chelyabinsk region. This report contains calculations of the dynamics of the acceleration of model rockets weighing 230-290 g engines with a total impulse of 20 to 40 N – S. the Authors first examine the effect of parameters where the speed of descent of the model. And the practical value of this material is that the results of the lengthy calculations are given in easy-to-use form.

SARATOV “THE LANCERS”

04.06.201813.05.2018Design

Has become a matter of habit the appearance of the next articles on the subject of electric mobility. No wonder: in the USA the production of electric vehicles is 1/5 part of the total production of passenger vehicles. And in Switzerland, everyone who wants to buy an electric car is allocated a loan of 5000 Swiss brands.

ENOUGH TO BLOW

04.06.201813.05.2018Good recommendations

In the holes drilled in a wooden tube in the concrete wall, there is always a lot of sand and dust. To remove them will help plastic or metal tube by simply inserting it into the hole and how to blow into it (but mind your eyes!). S. DOROFEEV, p. vokhtoga, Vologda region.

SEAMSTRESS TO HELP

04.06.201813.05.2018Good recommendations

I read in one of last year’s numbers on the device,facilitating the ladies thread the needle eye of a needle. So, your grandmother and I have made it easier and much easier — she can do it even without glasses. Tin cut out a teardrop shape of the handle, to which is soldered a Read more…

THE ROCKET PLANE, BRINGING PRIZES

04.06.201813.05.2018Aviation

For the past three years an enviable stability in the class 84В shows Moscow racemode-sheet O. the ravens. It was not the case, so he did not became the winner. So the next championship of Russia, held in Orel, Oleg took the second place. To a large extent the key to this is the reliability of sports “projectile” rocket plane. N addition to the model, there is absolutely oryginalny automatic forced landing. I hope that this design will interest our readers.The proposed model is a bright representative of the so-called “Moscow” scheme raketoplana. Fuzuli — tapered beam of plastic. Its manufacturing technology Tenova. On the mandrel of variable cross section with a diameter of from 4 to 8 mm is wound first single steklotarny layer with a thickness of 0.06 mm, then the first layer of carbon fabric with a thickness of 0.12 — 0.14 mm and the second, just a length of 160 mm. then applied another two layers of glass, all carefully vyshkurivaetsya. The weight of finished beam is obtained in the range of 1.5 g.

TRANSATLANTIK IN MINIATURE

04.06.201813.05.2018World of models

A prototype of the proposed model-polyopia was a unique motor speed the ship Des-triero. Built by Italian club “Costa Smeraldo”, it was intended for a single purpose — to beat the speed record for transatlantic crossing, owned since 1990 no less unique boat Hoverspeed Great Britain. Great work on designing and developing unique vessel was done by the Italians with success: Destriero has passed the way from England to new York in 58 hours 34 minutes and 50 seconds, thus putting a new world record.

TRANSISTOR – LIKE A TUBE

03.06.201813.05.2018Devices helpers

ULF bass reflex on one first transistor. Numerous calculations and experiments to create powerful high-quality low-frequency amplifier has led me to believe that the most promising way to the design is to use a phase inverter on one first transistor. It is curious that such amplifiers could be forty years ago, but this has not happened due to a number of reasons.

ROCK IN THE GARDEN

03.06.201813.05.2018Small-scale mechanization

We are not talking about dancing on beds, and about the original garden tool with which time-consuming, running from time immemorial bayonet shovel (in the best case — the special fork) work on the “home” plots become even elderly people (author and tester this design is over seventy).

HOME DESK:

03.06.201813.05.2018Own hands

It happens, unfortunately, that the student no home of his Desk that he would be doing homework, playing, making. Meanwhile, the construction of such a table can be so simple that you can make it under the power and home handyman. Enough to see the post here to the options proposed by the Hungarian magazine “Earmaster”. This is two tables that have additional facilities compared to normal desks.