Scuba diving PADI...! I used the frog shoes for the first time. In the swimming pool, I can't kick the water up and down. What's the matter?
Based on the above two points, we gradually carry out this topic of discussion.Three major resistances encountered by an object in water motionThe density of the water is 775 times the density of air, object in water resistance is 1000 times encountered in the air resistance, the correct answers and methods so we must seriously study the water resistance problem to find out the selection and use of fins. Any object moving in any direction in water must meet the following three resistances:
The fins are the product of bionicsDuck duck web in human after long-term water sports practice, the frog flippers, a tail fin made of fish fins. Although the fins has greatly improved the efficiency of human action in the water, but the human imitation of fins with webbed wings animal than there is a big gap, which is mainly manifested in the following 2 points:Animal webbed wings is a part of the body, according to the situation of arbitrary shape and pose transformation, so the efficiency of human made fins are never better than animal webbed wings.The water on the properties of water animal has a natural perception and understanding, instinctively hold method and rhythm of the effort to use their webbed wings, and the human needs of learning and training in order to make good use of fins.
Uncover the mystery of finsThe fins directly affects the degree of fatigue and the fun of scuba divers. For a long time, our understanding of fins is rather vague, even diving tutorial is no clear features of all kinds of fins talk ambiguously, speaking from the principle, problems and methods of use.This paper tries to fin origin, physical properties, and the improved method, several practical aspects to explain the relevant problem of fins criterion.
The fins are you using? I had cramp flippers, with forked fins, each fin and play frequency is not the same, you have to figure out what your fins is the kind, I first posted there technically Leroy diving stick, you see, if you do not understand because of me.
