When an engine is ignited, it produces thrust and boosts the rocket into the sky. After the propellant is used up, delay is activated, producing tracking smoke and allowing the rocket a brief coast.
infirmary (plural infirmaries) 1  A place where sick or injured people are cared for, especially a small hospital; sickhouse. 2  A clinic or dispensary within another institution.
Typically, an infirmary is attached to an institution like a school or prison, providing care for residents and employees of the organization. The availability of on-site care can make a facility safer and it may also appeal to people evaluating the facility's level of care.