Skis or a catamaran?

Design of a self-propelled float

The watercraft we would like to introduce to readers can quite rightly be classed as a small vessel. After all, what else would you call a pair of versatile self-propelled floats that can easily be used both as water skis and as a two-seater pleasure catamaran. As can be seen from the drawings, each float Read more…

Adjustable table

How to Make Adjustable Height Children's Table: Complete DIY

It’s good if a child has their own table for games and activities. But it would be even better if the table always matched the child’s age, or more precisely — their height. The table design proposed by the Hungarian magazine «Eszermester» allows you to adjust its height. This is achieved by making the legs Read more…

Bath grate

DIY Bathtub Grid: How to Make Wooden Bath Mat Yourself

Over the twenty years since the collapse of the Soviet Union, we have become accustomed to running to the store for ready-made products at the slightest thing. The managers who appeared in the country in huge numbers, absorbed by the thirst for profit, today don’t even know how to hold a hammer. This is also Read more…

Opposed engine — beyond competition!

DD-700/40: Two-Cylinder Engine for Ultralight Aircraft

This two-cylinder engine, designated DD-700/40, was designed and built by Georgy Dorfman, head of the public design bureau “Aerosam”. The motor turned out to be exceptionally successful: reliable, relatively simple, and quite lightweight. The motor was exhibited at the IV All-Union Review-Competition SLA-87 and was approved by the technical commission of the rally. To date, Read more…

A copy? Not only!..

DIY Gasoline-Powered Soil Tiller Guide

The prototype of the gasoline-powered tiller built by students of the Moscow region school of the “Gorki Leninskie” state farm was based on a machine of the same purpose produced by one of the Latvian factories. It is designed for soil preparation for sowing and planting and for tilling soil in the inter-rows of forest Read more…

Motor block built by a youth technical club

DIY Motor Block "Kirpi": Compact Agricultural Machinery

In gardens and vegetable plots, at dachas and school grounds — everywhere where there is a need to cultivate small areas of land, universal walk-behind tractors (UWT) are widely used. Including homemade ones, often created with maximum use of standard units and parts. One such design was developed and successfully tested by young technicians at Read more…

Funicular for a skier

Portable Ski Tow Lift: DIY Guide with Calculations

For tourists and skiers in “large” mountains with complex terrain and significant elevation differences, chairlifts are usually installed. On their traction-carrying cable, they have special suspensions with one or two chairs. The length of such lifts is limited to 1.5—2 km: experience has shown that an ascent exceeding 10—15 minutes in time can lead to Read more…

Vehicle microclimate

Oka Car Winter Preheater: DIY Coolant System, Schematic & Build

Many motorists, especially owners of domestic cars, have experienced all the “joys” of winter operation of their beloved “steeds” firsthand. A particular “pleasure” is bringing the heart—the “fiery engine”—back to life after a frosty night. I own a giant of Russian automaking—the Oka—so all my thoughts and efforts went into developing a system that would Read more…