HOW IT WORKS - FluidPowerZone

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At the core of all FluidPowerZone machines by FDF is the patented Twin Tank technology, providing 10 distinct levels of Fluid Resistance. The patented technology comprises Twin Tanks, the inner passive or holding tank and the outer active or resistance tank.

When you select a high level, water will flow from the passive holding tank to the active resistance tank as you begin to exercise, and you will experience the smooth fluid resistance, no matter what your speed.

Conversely, if you select a low level, the water will be transferred away from the active resistance tank and back into the passive holding tank, lowering the resistance. You can even make adjustments on the fly to find a load that is just right for your fitness training zone.

How Fluid Resistance Works

FDF Vertical Twin Tank - How it Works


The water in active resistance tank acts as a brake to hold back the multi-bladed impeller, the more water in the active resistance tank the greater the braking effect. The water in the active tank isn’t all staying in the active tank during the exercise (at any level), some of it is always being cycled through the passive holding tank. As you attempt to generate more power by increasing your speed the water cycles faster between the Twin Tanks at greater and greater speed to maintain a consistent amount of water in both tanks. This creates such a unique smooth action and at virtually any speed.

Air  resistance works in a similar way, however the variation in load that is possible by restricting  an impeller from “no air to total air” does not create distinctly different levels of resistance, this is very obvious at low speeds.

At high speeds the two mediums, water and air, start to feel similar except for one very key difference that makes adjustable fluid resistance so unique. When the drive phase of an activity is followed by a recovery phase, as in rowing or ski ergometer exercises, during this recovery phase air does not provide the braking force that the water in our vertical tank does. At the catch or beginning of the next drive phase the air machine impeller has high momentum and that creates a soft or no load pick up.

Essentially the resistance on an air machine can not be felt again until your speed catches up to the flywheel and you start to apply a greater force against which the air will resist. These differences are so easy for you to test for yourself. Compare the ROW against any common air resisted rowing machine. You will quickly see why our patented Twin Tank Fluid Resistance system is so smooth and consistent at virtually any speed.

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