In this science fair project, measure the rate of rotation of a remote-controlled helicopter rotor, using a digital tachometer, and relate this to the lift the blade generates. The Science Buddies project ideas are set up consistently beginning with an abstract, objective, and introduction, followed by a section on terms, concepts, and questions, bibliography, list of materials and equipment, experimental procedure, suggestions on how to vary the experiment, plus a focus on the sort of careers this experiment might relate to.