This Banki turbine has been obtained from a galvanized tube of 2 "
5,02cm and two steel discs of the diameter of 15,5 cm.
Here under there are the calculations for the dimensioning of the turbine: H = fallen height = 50 ' = 15 m ;
P
beam of blade = 1 " = 2,54 cm;
R1= beam of disc = (R1=P/0,326) = 3,06 " = 7,7 cm;
D1 = diameter lateral Disc = (R1*2) = 6.1 " = 15,5 cm;
a= (Diameter disc * 0,17) = (6.1 " * 0,17) = 1,037 " = 2,65 cm;
L*D1 = Width blade * Diameter Disc = (210 * Capacity water/H 1/2) = 210,6 * 0,33 cfs * 7 ' = 9,93 ";
L= (9,93 " /D1) = (9,93 "/6.1 ") = 1,62 " + 25% (compensation losses thickness blade) = 2 " = 5 cm approximately;
N = speed turbine = (862/D1) *H1/2 = (862/6,1 ") *7 = 990 RPM R2 = R1 - to = 3,06 " - 1,037 " = 2,023 " = 5,138 cm;
height blade = 73,28° of a tube of 2 " = 3,7 cm;
width blade = L = 2 " = 5 cm circumference of a tube of 2 " = 17,835 cm; Divided disc of 360° for 20 blades = 18°
Here under there are the images of the procedure of the construction: