What pitch attitude should you rotate to during an instrument takeoff?

During an instrument takeoff, rotating to a pitch attitude of 13° - 15° nose-high is optimal because it strikes a balance between achieving an effective climb rate while ensuring adequate control of the aircraft in the initial phase of flight. This range allows for sufficient lift generation without risking a stall, providing the pilot with the necessary authority to manage the airplane effectively in reduced visibility conditions.

Additionally, this pitch attitude supports the airspeed required for a safe climb-out while keeping the aircraft in the correct performance envelope. Maintaining the specified pitch attitude ensures that the aircraft is configured properly for the instrument conditions, allowing for a coordinated ascent and the readiness to execute any necessary maneuvering as dictated by the instrument flight rules.

While other pitch attitudes may seem reasonable, they could either lead to suboptimal climb performances or increase the risk of losing control due to an improper angle of attack. Therefore, the selection of 13° - 15° nose-high is not only a standard operating procedure but also a critical safety measure during instrument departures.