Homebuilt machines

Homebuilt machines are those constructed outside of professional factories or workshops. While the term can cover kit cars and homebuilt computers, it most often refers to amateur-built aircraft, sometimes called kit planes. These aircraft and kit cars are typically put together by hobbyists rather than professionals. The practice of building computers at home dates back to the Victorian era, with Charles Babbage’s work in the 1820s. About a century later, Konrad Zuse assembled his own machine using widely available electromechanical relays. The hobby gained real momentum with the arrival of early microprocessors, and since then many enthusiasts have built their own computers.

A homebuilt vehicle is a broader category than a kit car. It refers to any motor vehicle—car, truck, or motorcycle—built by an individual rather than a manufacturer. Such machines can be created from scratch, from plans, or from assembly kits. In places like Russia, where professional networks for spare parts, plans, or advice are often lacking, builders must rely on their own ingenuity and intuition to create a working machine.

Examples of homebuilt machinery include amateur radio homebrew, which is the slang term for homemade, noncommercial radio equipment. Amateur telescope making is another offshoot, where unpaid hobbyists build telescopes for personal enjoyment or to contribute to astronomy. Dune buggies are often built by forming and welding a steel tube frame, allowing the builder to modify suspension and add a roll cage; these are called sandrails. Sandrails frequently have the engine behind the driver, like a VW Bug, and can range from small single-seaters to four-seat vehicles with eight or more cylinders. Some have custom body panels, while many remain bare.

Amateur rocketry, also known as experimental rocketry, involves hobbyists experimenting with fuels and building their own rocket motors. They launch various types and sizes of rockets and have contributed significant research into hybrid motors, as well as solid, liquid, and hybrid propellant designs. On May 17, 2004, the Civilian Space eXploration Team (CSXT) launched the first amateur high-power rocket into space, reaching 72 miles (115 km). Earlier, on November 23, 1996, the Reaction Research Society launched a solid-fueled rocket designed by George Garboden to 50 miles (80 km) from Nevada’s Black Rock Desert.