Tag Archive: bio mechanics

Improving steering of motorized fishing kayaks and small boats

Here is some exciting news – Wavewalk is offering a new joystick steering system for its 700 series of two-person car-top fishing boat and microskiff. The new system makes steering easier and more comfortable, and safer too if you happen to use a powerful outboard motor such as the 6 hp Tohatsu featuring in this video:

 

 

Attaching and detaching this system is a breeze, and it takes seconds, literally. This means that an angler who wants to get the joystick and cables out of their way in order to make room for casting and landing fish can do it effortlessly and in no time, and later reattach the joystick and cables with the same ease.

Read more about this new joystick steering system for motorized fishing kayaks and small boats »

The Microskiff redefined

What is a microskiff?

Typically, a microskiff is a small, lightweight, flat bottomed motorboat used for flats fishing as well as in protected bays, estuaries, lakes and slow moving rivers, by a crew of one or two anglers. Some would trace the microskiff lineage to dinghies.
Small and lightweight in this case means a boat transported by trailer, and therefore requiring to be launched and beached at a boat ramp.

Microskiff’s propulsion problem

Microskiff are made to be propelled primarily by outboard motors, and the typical microskiff is too wide and heavy to allow for paddling. This is problematic for a number of reasons –
To begin with, an outboard motor can run out of gas, or stall due to a technical problem, and the electric trolling motor that many microskiff have on board isn’t enough for effective traveling over longer distances.
But more importantly, both outboard gas motors and electric trolling motors use propellers that must be immersed in water at a certain height, so the effective draft of a microskiff under motor is quite high, and often too high for really shallow water, a.k.a “skinny water”.
This problem also limits the typical microskiff as far as launching and beaching locations are concerned, and this means that you must launch and beach it from a boat ramp, which is a major source of frustration over a lot of wasted fishing time.
To add insult to injury, propellers don’t do well in the presence of aquatic vegetation, be it seaweed, grass, etc. This is particularly frustrating to anglers who realize that such waters are among the best fisheries.

Human powered propulsion – Poling, anyone?

Microskiff manufacturers often show pictures of people who use a long push-pole to propel their microskiff through shallow water. This human powered mode of propulsion is indeed possible, but it’s not that practical –
To begin with, poling involves long intervals between each pole push, so the big effort invested in each push that accelerates the boat goes to waste when the boat decelerates while you are busy lifting the pole and sticking it back into the water.  Acceleration is particularly demanding in energy terms, and in other words, the fact that microskiff are wide and heavy makes them lose speed quickly, and thereby drain your energy.
Few people can push a typical microskiff over a distance of more than several hundred yards, and that’s not enough in terms of real-world fishing.
On top of this, the hull of a typical microskiff is not designed for effective tracking – It’s neither very long nor narrow, and it lacks elements such as fins, skegs or tunnels that could improve its directional stability. The result is that poling in a straight line becomes harder, which means you waste an additional and considerable amount of energy because your microskiff zigzags instead of going straight forward.
Poling is far from being on par with more effective means of human powered propulsion such paddling and rowing.

Conclusion – A better microskiff should allow its crew to go in shallow water and vegetation-rich water in a human powered propulsion mode other than poling, and preferably paddling, since effective rowing requires good technique that can be acquired only through much practice.

An ideal microskiff for real-world fishing

Ideally, a microskiff should allow for either a crew of two fishermen or a solo fisherman to launch, beach, motorize, fish and paddle in any type of water, whether standing up or seated. This means that such a boat should be highly stable yet narrow enough for effective paddling, and only the patented, catamaran-style Wavewalk™ from the new 700 series offers to work as a both a full tandem and solo skiff in the sense that it works perfectly well for one person too, when the second crew member is missing. The fact that the W700 features two long and narrow catamaran-style hulls helps it track better than other craft of similar size, and that helps poling as well as paddling it, with either dual-blade (kayak) paddles or single-blade paddles – canoeing style.

The ideal microskiff should also be lightweight enough to allow for trailer-free transportation, and car-topping by one person, in case no fishing buddy is present. Again, the only two-person microskiff that offers such advantage is the new Wavewalk™ 700, which weighs just 80 lbs without a motor and accessories.  In fact, this weight is lower than that of most high-end fishing kayaks out there, including sit-on-top (SOT) and sit-in models, especially tandem fishing kayaks, which are heavier than regular ones.

Trailer-free with triple propulsion capability

The redefined microskiff is trailer-free I.E. easy to car top even for one person, suitable for choppy water, skinny water and vegetation-rich water, and accommodates two full size fishermen fishing standing in comfort. It can be easily and comfortably driven with a powerful outboard motor of up to 5 HP, as well as with electric motors.
One or two people can easily paddle it kayak-style or in the traditional canoeing style, and it lends itself to poling more easily and effectively than any other microskiff does, including solo skiffs, I.E. microskiff for just one person.
Such is the new Wavewalk™ 700 series.

The typical fishing kayak is a cluttered barge

This short review of recent kayak design articles highlights some aspects of the common fishing kayak.

The first, and probably most striking thing about the typical SOT, sit-in or hybrid fishing kayak that’s offered in stores or online is its size – It is huge, and consequently heavy and hard for one person to carry and car top, as well as hard to paddle, especially in wind and current.
Those kayaks seem to have crossed the line between a kayak and a boat, or a skiff, since practically speaking they require transportation by trailer. And indeed, some manufacturers already refer to their larger fishing kayak models as boats, not because of their performance or some additional functionality, but due to their size.
Needless to say that this fact alone is evidence that such kayaks defy the purpose of kayak fishing.

The second most striking aspect of those large-size fishing kayaks is the dysfunctional clutter in their cockpit and deck that seem so crowded with fishing accessories and just ‘stuff’ that the angler sitting or attempting to stand in them literally has no room to do so. These objects range in size, from small cup holders to large size lean bars, and their presence in the kayak’s cockpit is not only unnecessary to the angler, it is clearly counterproductive.

The third interesting thing about these larger than life (I.E. too large for real people to fish from in real life) kayaks is the absence of hydrodynamic design in them: They are not even close to conform to basic boat design standards or even to common sense: Not only are they much too wide for their length, which slows them down and makes them track poorly and require a cumbersome rudder – their underside features a variety of design elements that are extremely counterproductive as fare as speed is concerned. Such elements can be multiple scupper holes and molded-in channels, fins, and even a skeg.

Ironically, none of these accessories, systems and design elements offers a real solution to the fundamental problems that the average angler experiences when using them –

These unsolved problems in these common fishing kayaks are:

1.  Poor ergonomics, meaning mainly lack of comfort, early fatigue and back pain, as well as bad bio-mechanical design, which the angler feels as a restricted range of motion in both paddling and fishing. The new beach seat style kayak seats are obviously a botched attempt to address this issue, as foam filled seats failed to do so in the past.

2.  Insufficient stability albeit the fact that these fishing kayaks are extremely wide.

3.  Wetness as a result of the kayak offering too little or no free board, and scupper holes that conduct water upward onto the deck and cockpit, a problem annoying to a point that  manufacturers have to offer scupper plugs…

4.  These kayaks are as wide as canoes and as as sluggish and unfit for paddling in strong wind, waves and other real world factors.

5.  With all the stuff tucked on board a typical SOT, sit-in or hybrid fishing kayak, such craft still scores very low in terms of storage, as one or more hatches address neither the need for enough storage space nor for adequate accessibility to the gear stored inside.

In contrast, the Wavewalk 500 series of twin hull kayaks offers a high level of fishability in all these factors.

References –

More is less in your fishing kayak’s cockpit – Too much stuff and too little fishability

The secrets of the SOT kayak’s underside

THE BARGE – A NEW CLASS OF FISHING KAYAKS

Review of 2013 fishing kayak design trends

A meager harvest when kayak anglers are concerned, and plenty of reasons for a good laugh 😀

2013 hasn’t been much different from previous years as far as fishing kayaks are concerned. The kayak obesity trend keeps being the main one, and it drives kayaks to reach titanic proportions. For example, kayaks that are 35 inches wide and weigh 80 lbs are almost typical, and a kayak that’s over 40 inches wide is no longer viewed as an aberration despite the fact that paddling such a kayak is quite a challenge, and almost impossible to do for medium and long distances. Leviathan barge kayaks weighing around 120 lbs are still considered as kayaks (at least by some) although even a seasoned weight lifter might find it hard to car top one, and people who buy them have to buy a trailer to go with them, which is yet another way to defy the purpose of kayak fishing.
The reason behind the persistence of this trend is the poor stability that fishing kayaks offer to their users, albeit the fact that kayak manufacturers insist that the kayaks they offer are very stable, enough to allow for kayak fishing standing… Go tell this to all those disappointed anglers who purchased such kayaks and found out that reality is different from bogus reviews and staged YouTube movies  🙁

Fishing kayak hulls keep featuring all sorts of weird longitudinal channels and vertical dimples that work perfectly to create more drag and by that further impede the kayaker and make it harder for them to paddle. The infamous scupper holes that were introduced as means to prevent the deck from collapsing but have since been hyped as drainage holes keep conducting water in both directions, which means they also drive water up and onto the deck, and into the paddler’s area.

In the twilight zone, kayaks with integrated outriggers are still being offered although the concept has proved to be rather useless in practical terms. It seems like the failure of the kayak industry to present kayaks that actually work for stand up kayak fishing drives more people to try outriggers.

New designs still appear on the scene, and they make one wonder if kayak designers have any ability to learn from others’ mistakes.

Pedal driven kayaks are still being promoted as the panacea, although reality has disproved most of their manufacturer’s claims as far as practical usefulness is concerned.

Kayak storage keeps relying on hatches, which are often inaccessible to the user while they’re out there in their kayak, trying to fish from it. Such hatches have an annoying tendency to fail to be waterproof, and that’s bad news for your sandwiches!

When ergonomic design is concerned, manufacturers seem to realize that the kayaks they offer are really uncomfortable, so they keep trying to come up with new ideas for seats, although it’s the seat itself together with the L sitting position that cause the back pain and leg numbness problems that so many anglers experience.

Motorizing… well, oddly enough, some kayak manufacturers tell their clients they can outfit their kayaks with powerful outboard gas motors. Naturally, not too many people buy into this nonsensical notion. The most ridiculous case in this regard is a kayak manufacturer who offers his clients to attach their outboard gas engine directly to the kayak’s transom, which like the rest of that kayak is made from a thin, rotationally molded plastic wall… It is only appropriate to apply Hanlon’s razor to this case, and say “Never attribute to malice that which is adequately explained by stupidity.” 😀

And last but not least, fishing kayak manufacturers keep competing with each other by offering an increasing range of useless accessories, from cup holders to stand-up metal frames and stand-up ropes and straps… The latter being pure exercises in futility, at least from the user’s standpoint.

No wonder the Wavewalk 500 keeps being the most loved fishing kayak out there!

When a fishing kayak turns into something else…

Sometimes a design offers more than the eye meets. In this case, a patented fishing kayak offering unrivaled stability and comfort as well as unmatched storage space and dryness can turn into a self-motorized water skiing device by virtue of its small size, light weight, ease of use, and tracking capabilities.

Watch this video:

Just drive around, standing up, with no motorboat to tow you… And you don’t need to be an athletic youth to perform this trick and enjoy it.

The middle aged guy demonstrating the kayak in this video is 6 ft tall and weighs 200 lbs.

The basic model of this rotationally molded Polyethylene W kayak weighs 59 lbs. The 2 hp Honda outboard motor weighs 29 lbs, and the transom motor mount adds five more pounds to the total.
The driver controls the motor and steers the craft through the tiller handle, which is outfitted with an articulated (jointed) tiller extension allowing for effective steering even when the driver is standing up.
This little wonder fits on top of any car rack, and inside some medium and large size vehicles.
It’s easy to carry just by dragging in on the ground by a strap attached to its bow, as demonstrated towards the end of the video clip.

Is this an effective solution for offshore trips? It is, and a simple and effective cockpit cover would provide additional protection from spray.

This watercraft can be outfitted with detachable flotation modules that would keep it afloat in case of a capsize accident leading to much water getting inside.

The more traditional ways to look at this small boat are either as a motorized fishing kayak or a personal microskiff. The difference between the two viewpoints is related to whether you’re used to fish out of a kayak or from a motorboat.