Wings – can they make you fly? (J.Willacy)

by John Willacy

A question that is often asked on the edge of the Performance sea paddling world is - should I paddle wings? Closely followed by – so which wings should I buy?

For me, the first was a question I asked when I was preparing for an attempt on the Anglesey Circumnavigation record, back in 2005. I had been paddling wings for about 15 years at that point but I was still unsure whether they would provide a useful advantage in the specific world of sea paddling. I asked around to see if I could find an answer. Figures were banded about, 2%, 10% even 15% faster. I heard plenty of opinions, though I realised that none were backed up by any reliable figures.

So in the end I headed up to the lake with my sea kayak and a car full of blades – flats and wings.

I set an out-and-back course on the lake, and using a heart rate monitor to paddle at a constant pace, I measured the time taken to paddle the course, repeating runs with different paddles. This wasn’t a great scientific experiment, it was just little old me with a pile of paddles. However as the test was repeated a number of times, averaging out various factors, it did come up with a result.

For me, there was a measurable and reproducible difference between flats and wings. I measured a time advantage of between 4 and 6 % in favour of the wings, not huge but significant.

So if we lay down the cash and buy a set will they change our world? Not exactly, but they might help. Let us look in a little more of detail.

The difference

A flat paddle blade ('flats' - sometimes known as European style) is what most of us would know as a standard kayak paddle. The front and rear face of the blade is relatively flat, often with a central reinforcing rib running the length of the rear face. The blade face may be slightly curved both in cross section and longitudinally but not greatly so.

Flats

 The difference with the wing blade is immediately obvious; the blade face is deeply curved in cross section with a concave drive face and a matching convex rear. There is a pronounced overhanging lip along the upper edge and no obvious reinforcing rib along the rear face. The blade looks a little like a stretched spoon.

 The wing paddle evolved from the competitive desire for efficiency and advantage. The wing paddle was first developed by Stefan Lindeberg in Sweden, with the Swedish national team starting to use the paddle in the mid 1980’s.  It quickly caught on across the racing world and is now de rigueur in both the flat and wild-water kayak racing disciplines.

Wings derive increased forward efficiency by reducing slippage of the paddle through the water  and also by allowing the paddler to generate drive better from their torso rotation, so bringing larger muscle groups into play. When a flat paddle is combined with pronounced torso rotation the paddle blade starts to slip sideways through the water, losing forward drive.

Wings

How do they work? A little more detail...

You may hear stories of how wing paddles generate ‘lift’ or you may even hear that they move forward  during the stroke. Grab a handful of the old sodium chloride at this point. Wings tend to give an advantage for a couple of reasons, simple reasons:

1. Wings ‘grip’ the water better than flats. The lip on the upper edge of the blade, combined with the convex cross-section of the blade, helps prevent slippage of water across the blade and over the upper edge – this removes blade flutter, and so energy losses during the stroke.  If you are a regular wing paddler and switch back to flats, blade flutter is probably the first thing you notice. You miss the way the wing blade ‘locks’ into the water. The lip and cross-sectional shape also minimise 'slip' of the blade through the water, further lowering losses.The blades 'lock' into the water rather than slipping through it.


2. A good wing paddling stroke will encourage the paddler to use torso rotation, and hence larger muscle groups during the stroke. This in turn will give more power and less fatigue. This is arguably less of a gain and more of a stroke efficiency improvement. Either way you look at it though, it still gives a (slight) advantage.

The Stroke

 An effective wing paddling stroke is a little different from a flat-blade stroke. It’s not difficult, just a little different. Wing paddles tend to guide the movement of the blade through the water themselves. They also tend to move away from the boat as the stroke develops, though this varies from one blade design to another.  This movement is partly what encourages the torso rotation and in turn the use of larger muscle groups as mentioned above. That said, the modern wing stroke (and modern blade design) has now evolved to move much closer and more parallel to the edge of the boat. We don't need to get too stressed about that however.

You do need to have a reasonable paddling stroke to get the most from the wings, it doesn't have to be perfect but it does need a little time to nurture.

The Ups and Downs

So let’s take a look at the advantages and disadvantages of using wing paddles over flat paddles.  If we look at the modern racing world we see that virtually the entire field are using wing paddles, so they must be’ better’ surely? Well, as is often the case, there is a little more to it than meets the eye.

Advantages

Going back to that advantage figure again of between a 4-6% advantage (let’s call it 5% say). So if you are out for a 1 hour paddle with your buddies, paddling wings will get you home around 3 minutes earlier – everything else being equal. That's all, 3 minutes - not exactly something to write home about.

But then if you are out for a 10 hour record attempt, then those same wings may get you to the finish line 30 minutes earlier - now that is a bit more useful.

Paddlers also grow to like the way the paddles grip the water. In a fast-sea kayak, flat-blades may feel ‘under-geared’.

Disadvantages

From the sea paddler’s point of view there are two main disadvantages:

As we heard wings are good for forward paddling strokes, after all that is what they are designed for, what they are optimised for.

However they are less effective than flat-blades at steering strokes, such as sweep strokes, stern-rudders etc. They are also pretty poor at slicing strokes - sculling-draw and bow-rudders for example. Rolling is less effective with wings too, as is reverse paddling.

You could probably sum it all up by saying that wings give an advantage to forward paddling strokes, but a disadvantage to pretty much everything else.

Wings are also different in rough water. Those less effective turning strokes can become significant here, and the fact that support strokes can become a little trickier isn’t exactly a positive characteristic. Wings don’t take too well to allowing the blades to sink below the surface, getting them back out again can be awkward.  None of these factors is a great problem in it’s own right, but you need to be aware of them, they can catch out the unwary. If your life revolves around ‘gnarly’ days in big water, lots of falling in or surfing, then life is going to be more comfortable with flats on the whole.

Wings also need a high paddling style; they do not work well with a low style. So if you drop to a very low style on a windy day, they may not give you too much help.

What few mention also, is the fact that for wings to be effective then you need to paddle at a certain pace. That does not mean that you always need to go at hairy-bears race pace, but you do need to keep the boat ticking along smoothly to gain that advantage. If you are out for a gentle bimble, chatting and taking life easy, then the wings are probably less efficient than a good set of flats. If this is your sort of paddling, then well, save your money.

That grip that is characteristic of the wings can become a downside when paddling a sea kayak into a stiff headwind too. The blades can feel as if they have been set in concrete, or suddenly doubled in size; after a while it can become tiring.

Switching

How hard is it to switch between wings and flats? Well, with a bit of practice it really isn’t. A paddler with frequent experience of paddling both sorts of paddles should be able to switch between them and be paddling along happily within a minute or two.

Wing Blade Characteristics

Blade Shape -

Basically this can be broken down into ‘parallel’ or ‘tear-drop’ type designs. Parallels may also be

Parallel

known as Rasmussen, while the Tear-Drop may also be known as Burton or Gamma. These terms basically refer to the way the upper and lower edge relate to each other. The parallel blades tend to be the older style of designs, while the tear-drops tend to be viewed as more recent designs, and more performance based. Both styles of designs are quite happily paddled on the sea and moving water; from the sea paddlers point of view the following factors tend to have a more significant effect on blade handling than the outright shape.

Tear-drop

Layback - 

This is the angle that the blade 'lays back' from the shaft - i.e. the blade is not a direct extension (or parallel) to an extended centre-line of the shaft. It is actually angled forward, away from the hands, so the tip of the blade lies ahead of the shaft centreline. Larger angles of layback tend to be found on flat water racing wings with an aim to give a better/cleaner entry and increased power transfer. From a sea paddling point of view, layback can make the paddles more unpredictable on moving water, and more awkward for stern-rudder surfing.

More Layback

Less Layback

Twist – 

A rotation along the length of the blade, so it is twisted a little like an aircraft propeller blade or a screw thread. Again the aim is to improve performance and power transfer during the stroke. Twist is less of a problem than layback on the rough stuff, but differing amounts of twist can make designs handle very differently from one another. An example of this is seen once again on the stern rudder where twist can give the blade hydro-dynamic lift, i.e. it may rise vertically out of the water when surfing – it can get tiring to always have to push it back down into the water. Some levels of twist can also make a blade more difficult to return to the surface when it has sunk below the surface.

Twist

Twist Compared

Lip -

The lip along the top edge of the blade tends to give the blade ‘grip’ in the water (along with pure blade size of course) - more lip makes the blade 'solid' in the water, less lip allows a little slip. Too much lip (and hence too much grip) is not a good thing. With a heavy sea kayak, into a strong headwind, too much grip can become uncomfortable - it becomes tiring as the stroke rate drops and places an increased strain on the joints.

Lip on upper edge

Tips -

If your wings become damaged at the tips it makes a big difference to how they enter the water and how much splash they make, so a metal tip can be a good idea. Some alloy/aluminium tips take the knocks well, but some also corrode badly in the salt environment, eventually causing delamination and ruining the blades. A stainless steel tip is expensive and a little heavier, but will make your blades last much longer. There are no corrosion problems with Composite tips either, but they do wear and if you hit rocks on a regular basis they are not going to last just as long as the metal ones.

Blade Choice

Blade choice for wings can become a difficult, time-consuming and possibly expensive affair. The wide variety of wing designs makes a much greater difference to the paddling experience than is the case with differing flat blade designs.Finding the right blade for you can be difficult.

General selection pointers

A blade that has been designed specifically for Wild Water Racing or Surf Ski Racing is usually a good starting point as it usually has quite friendly/average handling characteristics. Some people paddle successfully with flat-water racing wings, but I tend to find they don’t take the knocks quite as well and, more significantly, they tend to be a bit of a handful on rough water. I tend to go for rather ‘average’ designs, leaving the more advanced ones for flat-water.

Wings will grip the water more than flats, after all that is what they are designed for, so go with a smaller rather than larger blade size if in doubt. Likewise a little shorter overall length, and a more flexible shaft is not a bad idea. I tend to avoid split shafts if I can; to me they feel too stiff and lifeless, and if they are too stiff they can cause injury problems.

Wings on the rough

Summary

So are wings the choice for you? Well only you can make that choice...sorry.

Wing paddling is not difficult, but it does demand a certain level of skill and technique. It does bring advantages and reward but these may not be as significant as first thought.

Think back to the figures. Earlier we said that wings give around a 5% advantage.  So for a 1 hour paddle we will arrive 3 minutes earlier with wings (everything else being equal), over 3 hours it will be around 9 minutes earlier. For that advantage we have to take a performance penalty on much of our stroke repertoire, including steering and rolling. Is it worth it?

 That depends on our skill and what we have planned of course.  If we have a 3 hour race or a 10 hour record attempt ahead of us then it probably is. If we are looking for expedition paddling, racing, records, fitness training or just all-round efficient cruising then wings are likely the way to go. Likewise wings can be an option to broaden paddling horizons or to help improve our paddling stroke.

However, if our paddling is predominately gentle cruising, group coaching or heavy white-water playing or surfing then those standard flats are probably the better choice.

Wings can be, and are, paddled successfully in all areas of sea paddling – rough and smooth. However it must be realised that they are just a set of paddles, there’s no magic involved here. Sometimes they will be the better choice, sometimes flats will be. You pays your money...

One thing that does stand out though, once a paddler gets acquainted with their wings, they rarely want to swap back.

John Willacy - Jun 2016