The electric submarine of a Chinese farmer that defies logic

Although the idea of building a submarine in a rural Chinese workshop may seem like a joke, the reality is that Zhang Shengwu started doing it with just 5,000 yuan (about 600 euros) to buy basic materials like steel plates and second-hand motors. His first prototype, launched in 2016, had predictable problems: leaks and poor sealing that almost buried the project.

But what if you were sure you could do it even if no one believed it? Zhang redesigned his vessel and invested almost 40,000 yuan more (about 5,000 euros) to create the “Great Black Fish,” a handmade five-ton submarine with everything necessary to stay stable underwater.

The “Great Black Fish” project with electric motor

The “Great Black Fish” is not just a curiosity: it can carry two passengers, dive up to eight meters deep, and stay submerged for up to 30 minutes. Its propulsion depends on a battery system connected to an electric motor at the rear, which makes it move at a speed of about four knots.

Handmade construction and stability

Zhang incorporated into the vessel two tons of concrete to stabilize it and multiple ballast tanks to adjust buoyancy. This was key to overcoming the initial difficulties and allowing it to maneuver safely in shallow waters.

Local reaction and expectations

The neighbors who were initially skeptical were astonished when they saw the submarine in action on a nearby river. Now Zhang plans an improved version with oxygen purification systems and periscopes that can see up to two kilometers away.

The culture of rural inventors in China

Inventors who challenge the status quo

Zhang’s case is not isolated. In China, several rural self-employed individuals have developed surprising vehicles and machines with limited resources. For example, in 2015, another Chinese from Shaanxi built a nine-meter metal submarine after going into debt to finance it.

Stories of ingenuity and passion

Even earlier, in 2009, a hospitality worker created a submersible with recycled barrels near Beijing. These stories show a passion for mechanics and innovation beyond industrial workshops and large investments.

The future of the handmade electric submarine

Plans for a new model

Zhang is already working on a new submarine that will incorporate advanced technology such as oxygen purification systems and periscopes with great visual range. His plans include purchasing the blueprints and continuing to improve his creation.

Impact and inspiration

His project serves as inspiration for other inventors who want to overcome obstacles and prove that innovation is possible with little. The “Great Black Fish” is a clear example that rural creativity can go very far, even underwater.

The reality is that Zhang Shengwu has shown that, with determination and ingenuity, a farmer can build a functional electric submarine for almost half the price of a mid-range car. And this, amid so much technology and big companies, makes it worth looking toward the smaller workshops where the magic still happens.