Rating: 0.00/5.00 Technisub, Idea 3 - Fins

Idea 3

Foot pocket version. The foot pocket forms one body with the blade, transmitting to it the full stroke effort, while retaining all the necessary comfort requirements.

The IDEA3's variable geometry, gives a concave shape during the down-stroke, producing a "scoop" effect. The water is trapped and channelled, maximising propulsive thrust and preventing lateral  side-slipping of the fin.
During the negative recovery action of the up-stroke the end of the blade, which is very flexible, is free to bend and so reduces its surface and the effort required.