You’ll go further with less effort with the The SF-8 X-Pert Zoom split fin.
When it comes to the latest in fin technology, split fins are it. And TUSA started a legacy with these fins. For diving and especially snorkeling, you won’t have to pump your legs as hard when kicking. And yet you’ll power forward with ease. The SF-8 is unlike traditional fins: It attains propulsion by creating a pressure differential in the water flow using Propeller-Fin technology. Propeller-Fin Technology delivers ultra-high performance with a minimal expenditure, low-amplitude rapid flutter kick. As the fin moves through the water, its two wing-shaped surfaces create lift and forward propulsion –just like a propeller. Any water traveling over the top of the blade is funneled into and out of the split between the blades. Efficiency is increased; drag and effort is reduced.
It’s not accident these fins perform they way they do. TUSA developed a robot that can replicate the motions of a human being, and report the data. The robot is able to mimic the human under kick-bending at the ankle, knee and hip in one fluid motion, measure and convey the information. Using this robotic science, TUSA has been able to analyze the performance of the fins under several conditions, and apply its patented technologies to the SF-8.
Computer engineered for better performance, the SF-8 X-pert Zoom.
http://www.alertdiver.com/232 A great explanation of how split fins work.
The SF-8 X-Pert Zoom split fin is unlike traditional fins which create propulsion only through repulsive force, the SF-8 attains propulsion by creating a pressure differential in the water flow using Propeller-fin technology.
27 Tech Reasons
When using the standard, traditional blade fin, with the leg completely extended, there remains an angle of 27 degrees between the heel and the foot and the calf of the leg, causing a 10% loss of propulsion. Because the fin is angled below the body, during the kick phase, the body is pushed forward, instead of straight ahead. With the SF-8 fin, that 27 degree angle has been designed into the fin so the fin is parallel to the leg. This means that 100% of the energy expended during the kick phase is directed toward the propulsion of the diver. TUSA developed a robot that can replicate the motions of a human being. The robot is able to mimic the human under kick-bending at the ankle, knee and hip in one fluid motion. Using this robotic science, TUSA has been able to analyze the performance of the fins under several conditions. The robot is able to swim, through the water using kick variations, such as a large scissor kick with a slow repetition and vice versa. Using the latest technology, this robot measures the energy expended during the kick and the propulsive force that is created using that energy. To achieve maximum performance from this fin, use a small bent-knee kick with a light rhythm. This creates less strain on the leg muscles compared with traditional fins, reducing the diver's fatigue and subsequent air consumption.
- Propeller-fin technology provides the ultimate performance & comfort
- Innovative hydrofoil design that produces forward motion (propulsion) with less effort
- New age elastic material with ridged reinforced double layered construction
- 27 degree angle for maximum efficiency
- TUSA Patented easy-to-adjust strap features quick release buckles
- Color: HBK Black*, Cobalt Blue, Flash Yellow
- Sizes: S, M, L
*HBK Black has a stiffer blade compound
Size Chart For Men
||Up to size 7
||7 - 11
Size Chart For Women
||Up to Size 8
||8 - 12
FULL MANUFACTURER'S WARRANTY