Why are there no large Quadcopters?

There are many reasons why large Quadcopters do not exist, and these reasons can be broken down into three main categories: safety, cost, and complexity.

Safety is perhaps the most important reason why large Quadcopters do not exist. Quadcopters are inherently unstable and difficult to control, even when they are small. Adding additional mass to the design would only make them more difficult to handle and control. A large Quadcopter would be too heavy to safely lift off, and it would be difficult to maneuver in tight spaces. The increased size and weight would also make it more difficult to avoid objects and people during flight, increasing the chances of a crash or other accident.

Cost is another significant factor. A larger Quadcopter requires more powerful, expensive motors and batteries, which can quickly drive up the cost of the design. Additionally, the larger size would mean that the Quadcopter would require more components, including additional frames, motors, and batteries, further increasing the cost.

Finally, complexity is another factor that has prevented the development of large Quadcopters. A larger Quadcopter would require more sophisticated programming, more powerful electronics, and greater understanding of how it should fly. In addition, the larger size would require more complicated control systems and sensors to maintain stability, which would further add to the complexity of the design.

For these reasons, large Quadcopters are not common. Smaller Quadcopters are able to provide the same level of performance, while remaining easier to control, more cost-effective, and simpler to design and build. Thus, smaller Quadcopters are generally preferred for recreational and commercial applications.