When should motor ignitor(s) be installed for a high-power rocket motor?

The installation of motor ignitors for a high-power rocket should occur before the launch at the launcher or designated prep area. This practice ensures safety and allows for a controlled environment to prepare the rocket for flight. Installing the ignitors in advance, while the rocket is stationary and secure, minimizes risks associated with handling the rocket shortly before launch. It also allows for a final check of the ignitor connections and ensures that all systems are functioning properly prior to launch.

Conducting this procedure in a designated area reduces the chance of accidents or misfires occurring in areas where people may be nearby, thereby enhancing safety. By preparing the rocket with the ignitors in place before moving to the launch pad, the launch sequence can proceed in a well-organized manner, ensuring that all launch preparation steps are completed methodically and without unnecessary haste.