What is the speed limit for VM4?

The speed limit for VM4 is correctly identified as 125 knots. VM4 refers to a specified maneuvering speed within the context of aircraft operation, particularly when considering the safe handling of aircraft characteristics during a variety of situations, including turbulence and low-speed configurations.

At this speed, a pilot is capable of maintaining control of the aircraft while allowing for adequate margins for any potential stall conditions during maneuvers such as turns or during the approach phase of flight. Choosing 125 knots as the speed limit ensures that pilots have a clear operational threshold that aligns with safety guidelines established by aviation authorities, optimizing aircraft performance during critical phases of flight.

The other speeds presented, while they may seem plausible in different contexts, do not meet the specific standard for VM4. Each aircraft type may have different VM4 specifications based on their weight and configuration, but in this case, the 125 knots option aligns with standard practices in aviation safety and performance requirements determined by regulatory bodies.