Abstract: An efficient low flow, low head, undershot double acute angle turbine where the flow strikes the blades at 90° without the Betz limit. Blades are set at an acute angle to the axle and the turbine is positioned in the flow at the compliment of the blade angle. There is no lag on downstream blades. There is no turbulence when the idle blade enters the flow. Active blades exhaust to the next blade to extract more energy. Simple adjustments set the flow to the blade tip that will produce the highest rotational speed. It is portable. It can be scaled up for larger applications by adding blades to the axle or using longer blades. It can be made from repurposed materials using hand tools. Hydro installations include in a sluice and on a floating barge. It has been tested successfully in flowing water and wind.