Tag Archives: sailing kayaks and packrafts

Seawave 2: WindPaddle sail mount

One problem I’ve had sailing my Seawave is the sail tends to sway ever more violently from side to side when the wind gets too strong. This is not just a problem with the WP disc sail I now use (left); it was the same with the Pacific Action V-Sail I used on my Incept K40 in northwest Australia a few years ago. Unable to transfer the wind energy into forward motion, it instead spills over the sides in a flapping frenzy.

It’s well know these downwind sails (especially smaller ones) have a limit of about 15-20 mph beyond which they flip out. But lazily hooking up the WP to my Seawave’s decklines introduces a lot of slack (left) which may exacerbated the swaying. It was only when trying the similar AirSail and later my WP on my packraft in Scotland (at one point with gusts as strong as Australia) that I realised lashing the sail mounts close to the hull eliminated the swaying. At least on a broader bowed packraft.

Out sailing the Seawave the other day, I belatedly succeeded in tensioning the decklines on the water with some ever versatile SoftTies (right). As you can see left, that worked OK but annoyingly it wasn’t as windy as I’d hoped, and not enough to get the WP in a flap.

I’d forgotten to try my stick idea. Whether you use the deck cover on not, you can fix a transverse stick securely under the Seawave bow’s velcro flap and, with another couple of those nifty SoftTies, closely fix the WP to the stick. (I’ll be keeping an eye out for a nice bit of ally tube to replace the weathered old bamboo). Required work and added weight: negligible and it may work on other IKs, too. Something to try for next time.

Tested: Anfibio Packraft AirSail

See also:
Packboat Sailing
WindPaddle on MRS Nomad
Anfibio Rebel 2K Index Page

In a line Huge. 1.3m downwind disc sail supported by an inflatable hoop and which rolls down into a small bundle.

Cost €149 from Anfibio Store.

Weight (verified): 513g.

Where used Loch Hourn, off Knoydart, Scotland (on my Anfibio 2K, and alongside an MRS Nomad S1).

Barry tries his Anfibio AirSail as a brolly

Rolls up compact (unlike framed versions)
Big surface area
Unexpectedly stable, controllable and steerable
As long as you’re not using a deck, it can be temporarily pulled down and tucked under the knees when not wanted
A 3.5-m long Nomad S1 can move at up to 5mph in strong gusts
Uses the same valve and pump as the packraft
Doubles as a tent footprint or mini-tarp or even a brolly

Window is too high (on a fat-bowed packraft)
On a regular sized packraft, sailing might be slower than you think
About 20% more expensive than Anfibio’s same-diameter PackSail
Punctures or twisted bladder more likely than a broken batten?

The AirSail was supplied free by Anfibio for testing and review.

What They Say
The first packraft sail of its kind! The light, inflatable AirSail gets your packraft going and lets you experience speed even on calm waters. The sail creates completely new possibilities to be on tour with the Packraft. Only 466g and minimal packing size.

On a multi-day packrafting trip or where you’re not returning the same way into the wind, sailing downwind is a smart means of conserving energy while enjoying a look around. At any other time, it’s just plain fun. Until now, the only options for packrafts were flexible, spring-out WindPaddle disc sails and their many inferior knock-offs. I’ve made my own and tried both, and currently own a WP Adventure 2 which has been OK on the Seawave IK and my old MRS Nomad, and even better on the Rebel 2K.

The Anfibio AirSail differs by using an inflatable bladder ring inside a fabric rim casing which you inflate via a Boston valve with the same 10-euro mini hand pump you use to top up the boat. The sail’s outer diameter is 137cm, so the sail is close to 130cm, as stated. Surprisingly, it seems to be possible to achieve as effective levels of stiffness to a flexible batten disc sail – a key to consistent performance – while an AirSail packs down to the size of a sleeping pad. My WindPaddle folds down to a flat, 40-cm disc which some might find more awkward to pack on the trail, though I can’t say I did.

Alone, out on the water in windy conditions it would be tricky to deploy the AirSail. Assuming a skeg is fitted and the sail’s already clipped to the bow via a couple of mini-karabiners, you need to reach forward to unstrap the sail (hard in my 2K with a deck zipped up), unfurl to unkink it, plug in your mini pump and give it two dozen jabs to fully inflate – all without being blown around or losing your paddle. Were I doing this, I’d add a short ‘haul-line’ to the base of the sail so I could pull it back into arm’s reach.
I chose to do all this by the shore in the lee of a headland. I started with my electric Flex Pump but for some reason it didn’t do much, considering the small volume. It was the same next time, so in future I’d go straight to mini hand pump which needs around 25 pumps.

From my experiences with the WindPaddle on kayak and packraft, I was a bit nervous the even bigger AirSail might be a handful. I needn’t have worried. Funnelled down the steep-sided Loch Hourn, winds gusted to 15mph, but the Rebel 2K with the AirSail was easy to manage in a way the WindPaddle 2 never has been so far on other boats. And this was with an under-inflated air ring. There was no violent see-sawing from side to side, little need for constant correction and, considering I was out in the middle of a windy sea loch, I felt safe and in control. My paddle was leashed to the mooring line but also slipped securely under and out of the way underneath the DeckPack.

This plain sailing was partly because the 2K could not break into a gallop. I doubt I was going much faster than paddling, but it sure was effortless and relaxing. Had there been a signal I could have easily updated my profile on Insta or checked the forecast. The 4km which had taken me an increasingly slower 80 minutes, was covered downwind in an effortless 60 minutes
I also think the low centre of gravity of the loaded 2K helped it sit on the water and – crucially – the lack of slack between the sail and boat fittings kept the under-inflated sail from swaying. I must try this taught rigging on the kayak next time; that could have been my problem all along.

With the line clipped to a karabiner on my pfd or behind my head, most of the time I was sailing hands free which made filming easy. The line was just the right length, too. Only tiny tweaks were needed to keep the boat on line, due to the back getting blown round. This was most probably down to the small skeg, but was all much less frantic than my recent sail with the WP on the Seawave. I suppose with free hands, the paddle could have been used as rudder to maintain a heading, but I didn’t think to try that as I was going vaguely in the right direction. Something to try next time.
One problem with the AirSail: because the bow on a 2K is high compared to a kayak, the window is too high to see what’s ahead; it’s the lower third which needs a clear PVC pane. Most of the time it doesn’t matter; you can lower the sail or look around. In fact, it would be great if the whole thing was made of clear film, but weight, rolled volume or strength may not add up.

With the line out of your hands it’s easy to try and add a bit of speed by paddling as well, but at best this might add a tiny bit of speed and will help keep you warm. You do notice that not paddling can chill you. Once you’ve had a good look around, after being used to having to paddle every hard-won metre, sailing slowly might even be said to be a little boring unless the winds are strong,. But on a long day on a multi-day tour, you’ll welcome the break when you get a chance, as we did on Knoydart.

As you can see, a couple of weeks later I travelled with a mate in an MRS Nomad S1 using the same Anfibio AirSail, with me WindPaddling in my 2K. The longer Nomad is a bit faster than my 2K, and with the AirSail was quite a lot faster, maybe 15%, especially in strong winds. That meant that the Nomad had to stop to wait for me to catch up, which also proved that the AirSail could be pulled back and tucked out of the way under the knees. The added space up front on the Nomad makes this easier than in a regular packraft, but requires not using a deck, unless some sort of cross-strap arrangement is set up to hold the sail down.

Longer MRS Nomad S1 sailed quicker than my 2K

Sailing in squalls of up to 25mph took quite a lot of concentration but never felt unsafe. The Nomad was reaching 5mph (8mph) but remained stable and controllable (as did my slower 2K with the WP sail). With both types of sail, this was sailing at its best: satisfying, safe but exciting too
The problem with sailing is you don’t generate any heat. We were already wet from a long walk before we got on the water, and neither of our hiking cags were up to it. After an hour or so of hanging on in torrential squalls, and with another two hours to the end of the loch, my mate in the undecked Nomad had to go ashore to drain his boat by which time both of us were chilled. We’d both tried paddle-sailing to warm up (and me, to catch up), but were too far gone to make a difference in the conditions that day. If you plan to paddle and sail an undecked packraft in all conditions, get a dry suit and maybe a bilge pump.

Having used the AirSail and paddled alongside one, I still think I’d choose the cheaper, same weight/ø, batten-rimmed PackSail. For me the value in being able to stow or release a sail in a few seconds is not offset by the slight awkwardness of needing to stash a 40-cm disc. But it’s nice to have the choice.

Thanks to Anfibio for supplying the AirSail.

WindPaddle Adv 2: disc sailing revisted, again

Sadly WindPaddle.com went bust but now Anfibio make something similar

Packboat sailing

Adding a rudder to the Seawave inspired me to drag out my cheapo disc sail. I last tried it three years ago on the Amigo (below) when it worked OK, even without a rudder. But of course, a rudder is much better for keeping the boat on the wind while sitting back with the paddle on your lap and your hands on the sail lines.


Pulling the sail out the 3mm fibreglass rod or ‘batten’ broke. I  bought some more which, if anything, felt more pliable than the original but before I took it out it was broken in two places. Long sections of fibreglass rod in greater diameters can’t be sent bent so incur much higher postage charges which made reviving my KnockOffPaddle uneconomical. Worse still, removing the splintered rod from the sail (before I decided to ditch it) filled my hands with glass splinters for days. Nasty stuff.


I looked again at the original  WindPaddle whose prices have dropped in the UK. Their Adventure II model is up by 13cm to 119cm or 47″ in diameter, making a claimed area of 1.42m (as usual, π x r2. doesn’t add up to ‘1.42’ but never mind). It folds down to 42cm or 16 inches diameter but with squidge some more (ovalise) to tuck securely into the floor of your boat, and weighs just 400g (+30g for a control line).
I asked about the cheaper Scout sail and why it’s rated at 4–15 knots when the new Adventure II is rated at 6–30kn. It’s not just the bigger area; the Adv II has a significantly stiffer composite batten to help hold its shape. That’s important and why ships don’t have rubber masts.


A problem with all sails is that they can start swinging from side to side in a recirculating frenzy before either settling down, collapsing or diving for the drink, possibly when the wind is more than they can handle. I recall with previous V and disc sails that lot of your time is spent managing that motion, rather than galloping across the waves like a flying fish, but the promise of achieving that is why I persevere.
Update 2021: After having much better results with a AirSail on a packraft, I think some of this swinging could be down to clipping the sail to slack decklines, and not directly to mounts on the boat’s hull. I will try that next time.


When the £116 sail arrived, it certainly had a better quality feel than my smaller knock-off which went for under £20 on eBay and are now under a tenner. The sail fabric feels thicker and the crucual perimeter batten isn’t a regular GRP rod-like in a tent, but a flat flexible composite band about 8mm by 1mm. It takes significantly more effort to fold the Adventure II three times into its 16-inch hoop, but that should result in a more stable sail in action. Sea trials here.

coi - 12

Kayak and Packraft Sails

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Fitting a Pacific Action sail on Incept K40

See also this post as well as this post about using the PA in strong winds in Western Australia. There’s a video there too.

I’m pretty sure my 0.78m2 home-made disc sail is too small to push the 4-metre Incept along until wind conditions get beyond the pale. Recognising that, I tracked down a 1.5m Pacific Action for £175 instead of the usual £250 which is a bit much. As I mention here, you can easily make a V-sail yourself from bits of plastic piping and old trousers, but life is short and as I’ve experienced a PA in action in Shark Bay, I’ve treated myself. The nearest B&Q hardware store is half a day away.

They call it a ‘1.5m’ sail, but unless I am very much mistaken it’s more like 1.15m2 if you calculate the area of the Isosceles as 146cm across the top and 174 up the sides (graphic on right; or base x height of about 170 divided by 2). PA round those dimensions up on their website to 150cm and 180cm,  but that still doesn’t add up to 1.5m2 or 16 square feet. Maybe I should chill out a bit; a Ducati 900SS is actually 864cc and so on. As you can see left, it’s about twice as big as my 0.78m2 disc sail and it certainly looks like a metre-and-a-half square, so perhaps my sums are wrong. And it’s bigger in the right area too: up high where it counts. Plus you can see where you’re going – always handy in busy traffic lanes.

The sail comes in a compact bag of less than a metre. Can’t weigh things here but they claim 1.9kg; could even be less. Inside you get the two, 3-part masts made of thick glass fibre, the sail, fittings and rigging or lines, plus adequate instructions* for what turns out to be a fairly straightforward task. These instructions and fittings are obviously aimed at hardshells, be they SinKs or SoTs. With an IK you have to improvise a little. It helped knowing that there’s a picture of a PA sail on the Incept website (right), as well as this Kiwi guy’s video (bottom of page). The supplied cleats (sliding cord locks) are tiny and I recall Jeff replacing them on his Perception tandem for Shark Bay, but see below. Because of the confusing instructions combined with my congenital density, I misunderstood their simply application. On my first go at sailing the PA I was holding and maneuvering the control string by hand, as I did with the disc sail.

Up front the snaplinks (right) I’ve used to mount the disc sail also happen to be ideal positions for the PA’s webbing loop. And the bow handle ring toggle is the just about the minimum 12 inches ahead of the mast feet to take the shock cord clip (left) with which the sail springs forward when you release it. If that’s not quite enough far forward (as I think may be the case), I can stick a D-ring patch a few inches further forward right on the nose of the boat (as left). This position/angle may be more important than just getting a good spring forward, but also affect the sail support. We’ll see.

In Australia a few months later we did see. Further forward was indeed better, but I suspect still not optimal. When you think about it, the front attachment for the elastic would be better if it was set higher that the level of the mast feet. That’s because when you’re reaching across the wind with the downwind mast almost horizontal with the hull (as pictured left), the angle of leverage to keep the upper mast up gets very low; at 5-10° the tensioned elastic is almost at the same angle and so the sail collapses as shown in this video at 1.16. This happened to me all the time in Australia as the sail was pulled low to cope with the strong sidewinds. If I go ahead with my nasal bowsprit idea as mentioned here, I’m now thinking it might also be an idea to raise it a bit; have an upcurved bowsprit so the sail is more readily held up when reaching (near-horizontal).

While in Australia I also pushed the snaplinks to mount the sail straps directly through the black lugs and not around them as pictured right. This was because the strong wind was pushing the sail mount (a plastic plate) forward, making it go slack, reducing the elastic tension and causing more problems with handling. But by the time I made all these adaptions we were locked into two days of headwinds so I never really had a chance to see if it made any great difference.

Back to the original mounting story set in Scotland in summer 2011. It all went together easily enough, until it became clear some fittings were missing from the pack which for some reason looked like it had done the rounds with a few previous customers. Most fittings were not needed for my IK, except the four ¾-inch self tappers with which you permanently fix the mast feet position in relation to your kayak’s deck angle and with the sail splayed. According to the instructions* and this picture I found on the web this is an ‘8g ¾-inch’ screw, but that seems way too long to have two from opposing sides – one alone would act more as a bolt than a self-tapper getting a bite, but that is what they recommend; the subtext is these screws are important to make a solid fixture. What’s not made clear (or is perhaps obvious) is that you ought to pre-drill guide holes deep into the plastic mast feet lugs for the screw can get right in there. Some hardshells will have a bevelled or convex foredeck which is why you must set the mast foot angle (MFA) specific to your boat for optimum operation. On my set up, the MFA is horizontal (flat) as I’m using a plastic chopping board idea as PA suggest to give the feet the all-important support and avoid wear on the PVC deck. The feet move around quite a lot under tension as you pull the sail this way and that but, as I found first time out, the angle of those feet against the mast (as well as the webbing tension) must be solid if the sail is to spring up and open or splay out.

The sail rolls down out of the way and doesn’t interfere with paddling, though it does mean yet more cordage hanging around; you could get in a right old muddle if you don’t keep on top of it. PA do advise paddling with a knife or a less pointy rope cutter. I have a quick-grab Benchmark one (left) attached to my PA.

It was gusting up to 40mph before the local weather station packed up, and at times the sea was covered in foam streaks and swell, so I went to a back loch for a spin. Typically by the time I’d crawled into a dry suit in case I fell out and got dragged along by the sail, the wind had just about died, but it gave me a chance to test it out in tame conditions. That evening my paddling speeds back into the wind were greater than anything I managed under sail, but I was getting the hang of it and even got the knack of running almost across the wind. The vid from that session isn’t worth uploading unless you’re having trouble sleeping; I hope to have another session when the wind returns and on a loch that’s longer to the wind.
Lessons learned: need those self tappers to lock the feet, luckily the local store had some that may do the job. And I’ve since located that chopping board a bit better to the boat with some slots and zip ties until a better solution is required. 

Rigging the sail-adjusting cleat
Working out how to rig the control cord to alter the sail angle was actually rather simple once I put my mind to it. As mentioned, you get some small plastic cleats in the pack whose use is unclear. But digging around online for an alternative cleat (as other PA users tend to fit), I discovered what the PA comes with are very much like, if not exactly Clamcleat Line-Loks. Now I know what they are, their fitting and application is more clear. It’s not illustrated or explained in the PA instruction leaflet* I received; in fact I’d go as far as to say that the tiny yellow picture of the rigged Line-Lok in the PA leaflet is the wrong way round compared to what’s illustrated in the Clamcleat gif on the left. But even though (as I found) it does work crudely when rigged the wrong way round, I think I finally get it now. A Line-Lok a nifty solution to tensioning a tent guy in the Arctic as the link shows, but as Clamcleat’s gif on the above right also illustrates, you need two hands to release it – not something that may be easily available in rough conditions while trying to grab your paddle and not spill your tea. But so far I’ve found in the light conditions I’ve been out in, one-handed works fine and if it’s a real panic you just pull the sail down in a jiffy.
In fact, testing the correctly rigged locking cleat off a chair leg, it’s possible to achieve the release movement by spreading your fingers as long as it’s not too tightly jammed in the cleats, while adding tension (pulling the sail back/down) is certainly easy.

Having worked out how to string them up, the next question is where to attach them to the boat. By trial and error I found that cutting the supplied 4-5m line in half, rigging as above and then clipping the stainless steel clip to the K40 at the plastic lugs just behind the seat seems just right (left; it shares the left side lug with the rudder lifting line). Even though the Incept image with the red boat above seems to use the more forward points, fixed like this it puts the full sliding range of the locking cleat within arm’s reach while sat in the cockpit; or at least that’s how it looks on the lawn. I used the spring clips supplied to fix the control cord to the mast shackles, but at one point while sailing one unhooked itself from the shackle, so better to knot the cords securely to the shackle as PA recommend. To see how it sailed first time out, see this.

NB: A more recent set of fitting instructions were sent to me as a pdf from Pacific Action and are much clearer.
As far as I could see it wasn’t to be found on their website.