The physics of paddlingWhy does the paddle bend?

Stephan Gölnitz

 · 28.11.2022

The physics of paddling: Why does the paddle bend?Photo: Laura Duschek
Almost all paddles have a bend of around 7 to 14 degrees between the shaft and the paddle blade. Many beginners instinctively hold the paddle the wrong way round on their first attempt - with the bend pointing backwards. We show you how to do it right.

However, the blade always angles forwards and the photo clearly shows why: at the moment of the strongest pull, the shaft is not vertical in the water, but the paddle blade is. This means that the entire thrust on the blade is converted into propulsion. Without the bend, the blade would already be at an angle in the water at this stage - just like the shaft - and part of its force would not pull you forwards, but "downwards".
This is also the reason why you should not pull the paddle far behind your body. This is because precious - and limited - muscle energy is not used for propulsion and is wasted.

The arrow shows how the paddle stands vertically in the water and transforms the energy into thrust (arrow).Photo: Laura DuschekThe arrow shows how the paddle stands vertically in the water and transforms the energy into thrust (arrow).

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Stephan Gölnitz

Stephan Gölnitz

Deputy Editor in Chief surf

Stephan Gölnitz comes from Bochum and had Holland as his home windsurfing territory for many years before moving to Munich in 1996 for the job of test editor at surf magazine. The materials engineering graduate worked as a surf instructor on the Ijsselmeer during his studies and competed for several seasons for the Essen sailing team in the Surfbundesliga and the Funboard Cup. He completed a traineeship at surf-Magazin in the test department and since then has actively accompanied almost all tests on the boom and for more than 10 years also as a photographer. Stephan has covered many thousands of test kilometers, mainly on Lake Garda and in Langebaan, but also in Egypt and Tobago. He gets his hands on over 100 new sails and boards every year as his company car. Privately, he prefers to surf with a foil on Lake Walchensee or “unfortunately far too rarely” in the waves. SUP is Stephan's second passion, which he pursued for several years at numerous SUP races. Today, he prefers to paddle on river tours with family or friends - even for several days.

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