The first Black Brant I was launched at Churchill in 1959 and carried instruments weighing 100 kg to an altitude of 99 km. Most of the sounding rockets launched from Canada were sent aloft from Churchill, Manitoba. Today, Black Brants are no longer launched from Canada, but are still used by other countries . It is the reason for sending the rocket into space. Since there is little oxygen in the upper atmosphere, the rocket must carry its propellants, fuel and oxidizer, with it.
Propellants are a large portion of the weight of the rocket.
In liquid fuel rockets, fuel and oxidizer are pumped into the combustion chamber in the engine. This mixture is called a propellant. Black Brants have solid fuel motors. The propellant is a rubbery mass of fuel and oxidizer. It burns along the axis of the rocket.