What is the maximum level speed of the Chinook helicopter when at maximum weight?

The maximum level speed of the Chinook helicopter at maximum weight is accurately identified as 157 knots. This speed is a key performance parameter, indicating the operational limits the aircraft can reach under specific conditions, such as maximum weight while maintaining level flight.

Operating at this speed allows the Chinook to effectively accomplish various mission profiles, including troop transport and cargo movement. Understanding the maximum speed is crucial for pilots to ensure safety and efficiency during flight, especially during takeoff and landing scenarios under heavier load conditions.

In the context of the other options, while they present various speed measurements, the specifications for helicopters, particularly the Chinook's operational envelope, define its performance characteristics more precisely in knots. This measurement is vital in aviation, especially when discussing rotorcraft, which have different dynamics compared to fixed-wing aircraft.