Some articles on rotor, solidity rotors:
... To construct a windpump, the bladed rotor needs to be matched to the pump ... With non-electric windpumps, high solidity rotors are best used in conjunction with positive displacement (piston) pumps, because, single-acting piston pumps need about three times as much torque to ... Low solidity rotors, on the other hand, are best used with centrifugal pumps, waterladder pumps and chain and washer pumps, where the torque needed by the pump for starting is less ...
Famous quotes containing the word solidity:
“I often accuse my finest acquaintances of an immense frivolity; for, while there are manners and compliments we do not meet, we do not teach one another the lessons of honesty and sincerity that the brutes do, or of steadiness and solidity that the rocks do. The fault is commonly mutual; however, for we do not habitually demand any more of each other.”
—Henry David Thoreau (18171862)