A still from a video shows two angles of NASA parachute test. A supersonic parachute was tested by NASA’s Low-Density Supersonic Decelerator (LDSD) project. A rocket-fired sled and pulley system pulled a one kilometer rope with parachute attached. The right image shows the helicopter which carried the parachute aloft. The inset at top shows the winch which redirects the parachute cable to the rocket sled that increases the downward force on the parachute. 