Output power estimations using 2 different barrel sizes

Calculation using simple formula for POWER


Horsepower = Torque (foot pounds) x 2 pi x rpm / 33000 which simplifies to:
Horsepower = Torque x rpm / 5252.

Finding TORQUE by calculating the water pressure on the paddle area using:-
Paddle Area x Length x density of water x (Velcity of current2 / 2 x gravitational constant)
And multiplying this by RADIUS

Model 1:-    1.5 Metre Diameter HEB

Model 2:- 2 Metre Diameter HEB