The mechanical system is spring deployed using a regular pull handle. It is ideal for cars that do not have an onboard air system. For those cars that have onboard air, or wish to, then the Stroud pneumatic chute launcher is ideal! It is lighter and easier to use than the spring launcher. Both systems work equally well and the parachute does not know the difference.
Stroud parachute launchers work ONLY with Stroud chutes. Using other type chutes is VERY dangerous!