In which scenario should a helicopter pilot consider a running takeoff?

The scenario where a helicopter pilot should consider a running takeoff is when gross weight or density altitude prevents a sustained hover at normal hovering altitude. In this situation, the helicopter may not have sufficient power to maintain a hover due to a high load or environmental factors affecting air density, such as altitude or temperature.

A running takeoff allows the helicopter to gain speed while on the ground before becoming airborne, utilizing the translational lift generated by forward motion. This technique can be particularly beneficial in high-density altitude situations where the available lift is reduced, allowing the pilot to take off safely while maximizing the helicopter's performance capabilities.

This strategy is essential for ensuring safety and operational efficiency, especially under challenging conditions, as it enables the helicopter to achieve the necessary lift without relying solely on hovering power, which may be compromised.