Impulse Turbines are one of two types of turbines used in hydroelectric power. The impulse turbine is typically used with a head over 10 meters or greater. These impulse turbines also operate under high pressures. As described in Dr. Pearce's lecture the impulse turbine looks very similar to an old fashion water wheel or river boat paddle.
An impulse turbine has a large number of small "scoops" positioned around a central hub. This central hub would be connected to the generator, thereby producing energy. The large number of "scoops" allows for the turbine to spin at very high speeds. To view various types of impulse turbines please view the following link.[1] Turbines--Moknefski 10:10, 15 November 2007 (PST)