VIDEO - Turbine is self-starting. Pumps used for demo purposes only (gravity would typically be source of energy). Clear water inside containment cylinder with blue helical turbine runner. No vibration or cavitation observed. This demonstration's numbers: runner at 646 rpm with 810 gpm (1.8 cfs, 1.2 mgd) water flow; at 9.2 ft/sec (3 m/sec) velocity. Alternator in watertight blue canister to the left, covered by water spray. Electric outputpowered a motor off-screen to right. Underwater, just see ripples.