What maximum jet blast velocity can be expected at idle engine thrust?

The maximum jet blast velocity at idle engine thrust is generally expected to be greater than 65 mph. At idle, while engines are not operating at full thrust, they still generate a significant amount of airflow, which can produce a considerable jet blast. The value exceeding 65 mph indicates that even at idle, the thrust produced can lead to a potentially hazardous environment for nearby personnel and equipment.

Understanding the dynamics of jet blast is crucial for operational safety, particularly during taxiing or when the engines are running while the aircraft is stationary. This background knowledge is vital for pilots and ground crew to maintain safety protocols around the aircraft.

The figures provided in the other answer choices would understate the potential for jet blast at idle thrust settings, thus not accurately reflecting typical operational conditions.