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.
The Leeds General Infirmary and St James's University Hospital, Leeds are the main teaching hospitals in the West Yorkshire region with St James's University Hospital being one of the largest teaching hospitals in Europe.