The simplest flying system consisting of a series of hemp ropes threaded through pulleys on the grid, and tied off on the fly floor on a cleat. The usual arrangement is for three ropes to be attached to a flying piece, named by their position relative to the fly floor (short, centre and long). These names are used when levelling the flying piece, and giving it a dead. The three ropes are pulled or let in together, sometimes requiring more than one person to operate. A theatre using a hemp flying system is known as a Hemp House.