The standard “Pool Noodle” found in store can be used as a foam flotation module for Wavewalk 500 kayaks. Typically, it is 56″ long, and 2.5″ in diameter. Its volume is approximately 250 cubic inches, or roughly 1 gallon.
The extra large (XL) “jumbo” detachable plastic foam “Pool Noodle” is 58″ long, and 4″ in diameter. Its volume is approximately 700 cubic inches, or 3 gallons. This means that it’s nearly 3 times as effective as flotation compared to the standard flotation module.
In other words, the XL flotation module offers a net buoyancy that’s almost three times bigger that that offered by the standard flotation module, or roughly 25 lbs, while the standard flotation module offers just about 8 lbs of net buoyancy.
In practical terms, this means that you can make a very dense object weighing 25 lbs such as a led weight stay close to the surface of the water and not sink to the bottom, if you attach it to an XL flotation module.
An object’s density is measured by its volume divided by its weight.
The density of water is 1.
If the object you want to save from drowning is less dense than led, it can be heavier than 25 lbs and still be recovered by being attached to an XL flotation module. The less dense the object, the heavier it can be, since more of its weight will be supported by its own volume.
Objects with a density of 1 or less don’t require flotation to stay afloat, since the density of water is 1, and therefore they are lighter than water.
Most kayaks are molded from Polyethylene resins. Polyethylene is slightly less dense than water, but a Polyethylene kayak could still sink to the bottom if its hull gets filled was water because of the weight of the accessories attached to it, such as rubber handles, rod holders that have metal parts in them, and rivets, let alone a motor…
How To Attach Extra Large Side Flotation Modules To The Wavewalk TM Kayak?
If you’re driving a motorized Wavewalk 500, you’ll be going at a high speed, which would raise the kayak’s bow, and lower its stern. In such case, the rear pair of XL side flotation modules might occasionally come in contact with the water, and spray you… In order to avoid it, you’d need to attach the front end of the rear flotation modules higher than the rear ends of the front pair, as shown in this image:
Note: XL flotation modules are wider than standard ones, and attaching them on the sides of your W500 kayak would make it less easy to paddle. Therefore, we recommend using XL flotation modules only in cases where they are required.
More about detachable kayak flotation »
More about motorizing your kayak »