When the engines of an aircraft are about to be started, how far should you stay back?

Staying back a safe distance when an aircraft's engines are about to be started is crucial for ensuring personal safety and preventing accidents. The correct answer emphasizes the importance of maintaining a distance of within 25 feet in front of the aircraft and 200 feet to the rear.

This safety protocol is in place due to the fact that engines produce powerful prop wash and jet blast during start-up, which can cause loss of control or injuries to individuals who are too close. Being 25 feet in front of the aircraft helps to avoid the hazardous effects of the airflow generated by the engines, while the 200 feet distance to the rear is vital to ensure that individuals are out of the path of exhaust and any debris that may be disturbed during the ignition.

The specified distances in this answer reflect industry standards and procedures designed to protect those nearby and contribute to a safe working environment on the airfield.