Which of the following is NOT a criterion for a microlight aircraft?

Microlight aircraft are characterized by specific limitations regarding their performance and design to ensure safety and suitability for recreational flying. One of the distinguishing features of a microlight aircraft is that it must typically have low performance parameters; this includes restrictions on maximum speed, weight, and passenger capacity.

The criterion that is NOT applicable to microlight aircraft is high-speed capabilities. Microlights are designed for low-speed, low-altitude flight, primarily for recreational purposes. They typically do not possess the performance characteristics that would classify them as high-speed aircraft. This focus on low performance ensures that pilots can operate these aircraft safely and within the constraints of their design, especially since they are often flown in various weather conditions and over populated areas.

The other criteria related to carrying capacity and permissible weight or momentum limits align with the regulatory framework for microlights, which ensures that the aircraft remain within the safety standards established by aviation authorities. Thus, the emphasis on low performance and design for carrying no more than two persons are essential aspects that define the microlight category, while high-speed capabilities diverge from these fundamental characteristics.