PRINCIPLES~
This is a flap oscillating about an axis located at the channel bed or a certain distance above the bed. The edge of .the paddle may descend to the articulation axis or stop at a certain distance from this axis . The motion imparted to the water is zero at the channel bed. Therefore; this wave generator is not adaptable in principle except to waves of infinite depth, that is~ such that the wave length is less than twice the depth. In actuality the device yields good results even at very shallow depth.
~The construction is very simple; the flap may be made quite strong and rigid by means of proper shaping.
INERTIA :
The inertia is relatively small.
MAINTENANCE:
The single hinge is in the water, it can be quite simple and, its maintenance slight.
REFLECTION CHARACTERISTICS~
The flap is reflective, as demonstrated by theory and experience, yet its real reflection coefficient is smaller than the theoretical coefficient because of leakages along the walls, breaking, and turbulence.
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