When is it permissible to ship or store a solid propellant high power rocket motor with the ignitor installed?

Shipping or storing a solid propellant high power rocket motor with the ignitor installed is not permissible at any time due to safety concerns. The presence of the ignitor enhances the risk of accidental ignition, which could lead to catastrophic events, both during transportation and storage. Safety protocols are stringent in rocketry because solid propellants are sensitive to heat, shock, and other environmental factors.

The regulations surrounding the handling of rocket motors are designed to prevent any potential accidents that could arise from having an ignitor installed. This approach to safety emphasizes the need to keep the ignitor separate from the motor, ensuring that only intentional ignition occurs when the motor is safely launched in a controlled environment.

Therefore, the correct understanding is that precautions against unintended ignition are paramount, leading to the conclusion that having the ignitor installed is completely prohibited at all times during storage and transport.