Tag Archive: kayak stabiliy

Driving an S4 motorized kayak skiff with a 9.8 HP Tohatsu outboard at 17 mph

Captain Larry Jarboe from Wavewalk Adventures in Key Largo, Florida, drives his “White Knight” workhorse S4 kayak-skiff powered by a 9.8 HP 2-cycle Tohatsu outboard motor, outfitted with a 9″ pitch propeller.
Larry easily gets to a 17 mph speed, which is probably a world record for vessels that are officially designated as kayaks, such as the S4.
He drives sitting in the side-saddle position, similarly to the way that he’s been driving dinghies and other small boats for decades – No stability problems, and no control problems, even in the chop. Most people who drive the S4 and other Wavewalk kayaks / boats do it in the riding position, with a leg on each side of the saddle seat, similarly to the way that Personal Watercraft (PWC a.k.a. jet-ski) drivers operate these vessels.

Generally, 2-stroke outboard motors are lighter than comparable 4-stroke outboards, which makes them more portable.
9″ is the highest pitch for propellers that fit this motor. A propeller with a higher pitch would have probably added some speed to Larry’s record. In any case, 17 mph falls within the upper range of speeds achieved by small, lightweight boats with propellers of such pitch.

 

Practically speaking, this performance coupled with the S4’s capability to carry on board up to three anglers and their fishing gear, puts it on par with Jon boats, skiffs, and even some bass boats.
The S4 is an ultralight car-top boat that can be launched and carried anywhere, as well as paddled in extremely shallow water, and it is most seaworthy. These facts offer its users an advantage that neither conventional nor new boats do.

Note that Larry is a most experience boat driver, and driving such a small craft at such high speeds requires skills that not anyone has. This is to say that we do not recommend such powerful motors for the S4.

Four people having fun in three Wavewalk S4 skiffs, Key Largo

This is a video that shows people driving their S4 skiffs standing, riding the saddle seat, and sitting side-saddle, with and without a passenger on board, on flat water, in the chop, and in the ocean, in 2 ft waves. No problem whatsoever – Just fun, fun, fun!

 

 

Stability is non-issue in the S4 – It’s neither a problem in the physical sense, namely how the boat reacts to external forces, or in the ergonomic and psychological sense, namely balancing oneself as a driver or a passenger.
Driving is easy and intuitive, with or without a tiller extension, and the boat does what you want it to do, and feels almost like an extension of yourself.
Driving standing feels like skiing, except for the fact that you fully control both speed and direction.
Unlike standing in a Jon boat or on the flat deck of a common skiff, you stand in the S4 with a foot at the bottom of each hull and the saddle serves you as extra support and balancing enabler. In this sense, it’s more like riding a big personal watercraft, a.k.a. jet-ski, waverunner, etc.
A person who had never driven a boat before can drive an S4 standing within a short time on their first trip in it.

Many thanks to Captain Larry Jarboe, who made this possible and so enjoyable 🙂

Starring in this movie are (alphabetically) Dave, Larry, Orit and Yoav.

 

 

 

 

 

 

Driving the S4 in rough water in a big boat’s wake (movie)

We wanted to show the Wavewalk S4 going in rough water, but since we couldn’t find water that was choppy enough in Key Largo, we made our own chop 😀
Larry drove his commercial fishing boat, the Line Dancer, Orit sat at the stern and shot video with our new Nikon camera equipped with a X83 optical zoom lens (great camera), and I drove an S4 in the boat’s wake.

The Line Dancer’s wake was V shaped, with pronounced “ridges” of waves and turbulence on both sides, and a quieter area in between.
When we went in open areas where the tidal current and wind created natural chop, adding the boat’s wake on top generated pretty hectic conditions that were a bit challenging to drive through, mainly because the motor on my S4 was a little 3.5 HP that didn’t allow for much planing and playing. This application calls for a more powerful motor, and a 6 HP outboard would have probably yielded more spectacular action shots. But at least we were able to demonstrate the principle…
When we drove in quieter zones, I just surfed the Line Dancer’s wake, and that was easy and fun.

 

 

What’s the real-world advantage of the S4’s ability to go through fast currents and chop?
“Real World” usually means you have to go from point A to point B, and you’re not just looking for some driving action fun. This can happen when you use the S4 as a tender for a bigger boat, or yacht, or when you drive in fast rivers that are swollen by water from melting snow in spring, or by tidal currents in coastal areas.
Jon boats and skiffs don’t excel in such conditions, to say the least, and inflatable dinghies are neither the most comfortable nor the most reliable choice. But the S4 shines in the chop, not just due to its natural, physical, “catamaran” stability, but also because it offers the driver to ride a saddle seat similar to the seat that other high performance vehicles feature, such as personal watercraft (PWC a.k.a. “jet ski”), all-terrain vehicles (ATV), snowmobiles, and dirt bikes.

 

 

Wavewalk S4 in blue water

Wavewalk S4 driven in choppy blue water in the Atlantic ocean close to Key Largo, Florida.
It was fun to drive this watercraft that seems to be almost immune to waves, wherever they come from.
Hopping on waves and making sharp turns was easy solo and with a passenger on board.

As a skiff, it’s extremely seaworthy, and as a kayak it’s anything but 😀

We towed it behind the mother ship, and it was a pleasure to watch how well it behaved… It can serve as a perfect boat tender for a big boat or a yacht – It’s seaworthy, comfortable, fun to drive and to paddle, can be beached anywhere, and it can carry up to three people on board.

The S4 in this movie is under powered by a 3.5 HP outboard motor – A 6 HP outboard would have worked better in this case, but still, driving this ultralight microskiff in the chop was a lot of fun. Thankfully, the S4 is not a solo skiff, and driving it with a charming passenger on board was even more fun.

We didn’t have to outfit it with a spray shield, as hardly any spray got it.

 

 

 

 

Special thanks to Captain Larry Jarboe of Wavewalk Adventures in Key Largo.

Review of the Wavewalk S4 as a shrimping boat

By Fin Gold

North Carolina

The stability and closeness to the water make the Wavewalk S4 a perfect shrimping platform.
We go out on our S4 boat, named “The Dub”, with 2 or 3 people. One person in the back to operate the Tohatsu 3.5 hp motor, the shrimper in the front standing up with the cast net, and maybe a shrimp processor/sorter in the middle.
We recently harvested 40 lbs (heads off) of green-tail shrimp in 4 days of outings.

 

 

 

 

 

 


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