Bicycle in a suitcase

Teen folding bike that fits in a 650×450×150 mm case

A folding bicycle is nothing surprising today. However, even when folded, its dimensions are not that small, and storing it at home — let alone carrying it on a bus or tram — is not always convenient. I set out to develop a convenient folding bicycle with the smallest possible folded dimensions. I wanted it Read more…

Solar-powered dryer

Solar fruit dryer: design and operating principle

Fruits are dried in different ways. Most often — by the air-solar method, which, besides obvious advantages (simplicity, availability, etc.), has well-known drawbacks. The proposed solar dryer design is free of many disadvantages inherent in other constructions. The “greenhouse effect” works in it, as they say, at full capacity, providing a temperature under the film Read more…

The all-terrain vehicle changes its shoes

Pneumatic all-terrain vehicle by B. Ryzhov: 4x4 build

The author of the article and the creator of the all-terrain vehicle discussed here is Boris Nikolayevich Ryzhov — a long-time acquaintance of our magazine’s readers. Photographs of the machines he built (a tracked and a six-wheeled all-terrain vehicle) were published in the magazine as early as 1990 (No. 7). But the desire to create Read more…

Out for a sail

Universal hull: rowing boat and sailboat build

For those who live near water, a boat is as necessary as a motorcycle or car is for others. Of course, experienced amateur shipbuilders are unlikely to settle for the little craft we want to offer your attention, but for beginners in boatbuilding this boat design is just the thing. It is simple, technologically straightforward, Read more…

Tipper cart

Two-wheel tipping cart: DIY chassis and body build

This small cart, similar in shape and size to an ordinary wheelbarrow, differs from it in that it has two wheels and a tipping body. Its other feature is as follows: the chassis is designed using metal angle bars 30×30 and 25×25 mm (previously forming the frame of an old bed). Chassis construction The chassis Read more…