Centrifugal clutch is not a friction clutch.

Explanation:
A friction clutch is a mechanism used in various applications to transmit power from one rotating shaft to another. It works by creating friction between two surfaces, typically a rotating disc or plate and a stationary surface, to engage or disengage the power transmission. However, a centrifugal clutch operates on a different principle and does not rely on friction.

Centrifugal Clutch:
A centrifugal clutch is a type of clutch that uses centrifugal force to engage and disengage power transmission. It is commonly used in small engines, such as those in lawnmowers, go-karts, and chainsaws. The clutch consists of a set of weighted arms or shoes, which are mounted on a rotating drum or hub. When the engine speed increases, the centrifugal force causes the arms or shoes to move outward, engaging the clutch and transmitting power to the driven shaft.

Comparison to Friction Clutches:
Unlike friction clutches, which rely on the frictional force between two surfaces for engagement, centrifugal clutches use centrifugal force. Friction clutches typically consist of a disc or plate that is pressed against another surface to engage the clutch. The frictional force between the surfaces allows for power transmission. In contrast, a centrifugal clutch does not rely on a frictional force but rather on the centrifugal force generated by the rotating arms or shoes.

Advantages and Disadvantages:
Centrifugal clutches have some advantages over friction clutches in certain applications. They are relatively simple in design and do not require manual engagement or disengagement. They also provide automatic engagement at a specific engine speed, which can be advantageous in applications where the load may vary. However, centrifugal clutches have limited torque capacity compared to friction clutches and may not be suitable for high-power applications.

Conclusion:
In summary, a centrifugal clutch is not a friction clutch. While friction clutches rely on the frictional force between two surfaces for engagement, centrifugal clutches use centrifugal force generated by rotating arms or shoes. Understanding the differences between these types of clutches is important when selecting the appropriate clutch for a specific application.