G-Force brake is a brake parachute attached to the harness. It was developped to reduce physical stress when flying spirals. During spiraling huge G-Forces impact on the body, so that is not possible to fly this task for a long time. Dizziness, nausea and even blackouts can occur. With G-Force brake that risk can efficiently be reduced.
G-Force brake reduces the impact of G-Forces on the body of up to 40%. The brake parachute reduces the amount of turns at constant sink rate. Due to its additional drag the pilot is pulled a bit behind compared to spiraling without brake parachute. Thus the glider canopy has a steeper angle towards ground and reduce altitude more efficiently.
G-Force brake is particularly suited for high performance gliders with efficient aerodynamic characteristics and as well for tandem purposes.