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SF-6 IMPREX TRI-EX |
Model#: SF-6 |
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Ranked Number One Fin
By The UK Dive Magazine
Tested against 20 leading fins, the Tri-Ex came out on top.
"the Imprex Tri-Ex from TUSA was by far
the most comfortable fin tested."
Given a rating of 9.5 out of 10 the Tri-Ex is,
"lightweight" and "highly manoeuvrable".
At a reasonable price the Tri-Ex is definitely the way to go!
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The SF-6 Imprex Tri-Ex fin features TUSA’s Advanced
Multi-Flex Blade, made from 3 different materials which
reduces diver fatigue and air consumption for fast and
powerful propulsion from a traditional blade fin.
SF-6 History:
In 1993 TUSA introduced the SF-7700 (IMPREX) to the
market. This fin achieves strong propulsion by combining
two different materials to create efficient water
channelling action. The IMPREX fin has been the
undisputed leader in the plastic fin market. The next
generation IMPREX Tri-Ex fin utilizes three different
materials. First is the side rib (hard material),
efficiently converting the energy of a kick into
propelling power. Second is the blade (medium-hard
material), increasing the efficiency of the water
channel. Third is the foot pocket (soft material),
enhancing the fitting comfort and transferring power to
the ribs and blade. The designers expanded the blade
angle theory of the SF-8 X-Pert Zoom that had produced a
strong propulsion force with only a light kick. A fin
testing robot was used to analyze the propulsion (speed)
and the electrical load when kicking. These tests were
repeated many times, the result being that the blade
angle was set at 20 degrees, the most comfortable for
the diver. A smooth shape was also created, with no
level differences between the foot pocket and blade.
This means that compared with conventional products,
less initial load (energy) is required when first
starting to kick. The excellent fit and non-wasteful
transmission of energy ensures that body fatigue and air
consumption is minimized.
Features:
- Advanced Multi-Flex Blade design.
- 3 material construction.
- 20 degree angle for maximum efficiency.
- TUSA Patented easy-to-adjust strap features quick release buckles.
- Soft foot pocket enhances fit and increases ease of entry and comfort.
- TUSA's unique Advanced Multi-Flex Blade, made from 3 different materials.
- Colours: Black, Cobalt Blue, Flo. Yellow, Pale Blue, Pale Pink, Red, Silky Lilac.
- Sizes: XS, S, M, L, XL.
Colours and Sizes:
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BK |
CBL |
FY |
PBL |
PP |
R |
SLI |
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XS |
- |
• |
- |
• |
• |
- |
- |
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S |
• |
• |
• |
• |
• |
• |
• |
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M |
• |
• |
• |
• |
• |
• |
• |
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L |
• |
• |
• |
- |
- |
• |
- |
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XL |
• |
• |
- |
- |
- |
- |
- |
Technology:
Air Consumption Performance Test
Our in-house testing team performed some measurement tests on each of our fins to determine the air consumption for each one. Using
an underwater speedometer to maintain a constant speed of 0.77m/s, we measured over and over how much tank air the swimmer consumed
after swimming a fixed distance of 150 m. Measuring energy efficiency allows us to develop fins which deliver maximum speed with the
minimum fatigue.
Fin Testing Robot
This test involves scientific testing of energy consumption rates and speed performance, and then analyzing the resulting
data. TUSA's battery-driven fin robot kicks at a very precise pitch while a telemetry system using a computer by the pool
wirelessly measures the electrical resistance load (i.e. the energy consumption rate). For instance, we can measure how long
it takes the robot to swim across a 20m pool and what the electrical resistance load was during that time in order to evaluate
fin performance in a manner that's much more scientific than possible with human testers.
Flow Pool Test
TUSA has had the honour of doing joint research on fin energy consumption with the Nomura Swimming Research Lab
at Tsukuba University in Japan. One test included having four adult male swimmers use our fins in a flow pool while we measured
their oxygen uptake and heart rates. We were also able to scientifically evaluate the differences among different leg muscles
and fin kicking, as well as measure the pressure applied to the front and back of the fins using air-pack contact pressure
meters. The Nomura Research Lab analyzed the data we got from these tests and we applied the results to our product development process.
Global Monitoring
However, we realize that testing under real conditions is very important. That's why we send out prototype models to diving shops
around the world during the development process, in order to have real instructors and guide divers test them in normal
circumstances. Even after a concept makes it out of the prototype stage and goes on sale, we have monitoring groups which are made
up of regular divers who use the products and let us know their opinions, which we feed back into the development process.
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