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Propeller based human powered swimming device

Currently the only human powered swimming device
widely sold on the market are swim flippers. However, flippers are
not efficient for the human body, and there is a potential to
increase the speed while swimming with a device. This thesis is the
planning, design, construction, and prototyping of a new human
powered swimming device which increases human efficiency and speed
in water. This device uses a squatting motion to drive counter
rotating propellers up and down a threaded shaft creating the
propulsion force to move the swimmer forward. The design of this
device is primarily geared towards scuba divers and swimmers moving
beneath the water surface. Through various tests we were able to
prove that the design concept is valid, but alterations are still
necessary to reach optimal speed. One such improvement would be
enlarging the size of the propeller to increase the force generated
with each leg thrust.