Imparts even more twist in kernmantle ropes than figure 1. Same as figure 1 with the addition of a self-belay prusik. Brake bar rack rappel. Often used for caving and rappelling off tall buildings. Friction adjustable from light to heavy.
Rope runs straight without twisting.
Carabiner brake bar rappel. Obsolete technique used for personal rappels only. Only marginal, even if rigged correctly, because of side loading of carabiner gates. Many modern carabiners are not compatible with brake bars. Recommended to avoid using.