Gearlab, pioneer of the first modern Greenland-style paddles with exchangeable tips, has partnered with an engineer to develop a mechanism to measure the forces on a paddle in the water. The technology allows its designers to increase paddle strength and efficiency.
“In the industry, there is no set standard for testing stress placed on the paddles,” says lead designer and co-founder Henry Chang. “All our products go through systematic and rigorous research, usability analysis, and ﬁeld testing. As part of that process, we needed a way to measure how much force is in each stroke and determine the strength-to-weight ratio.”
In consultation with engineers at Gearlab’s design laboratory in Taiwan, engineer Declan Nowak designed an Arduino-powered sensor that records the force exerted by a paddler’s hands on a paddle. An Arduino is a small lightweight microcontroller that is perfect for data-recording applications because it records information to an SD card.
“Using the sensor, I was able to determine the maximum force a paddler is likely to apply in ideal paddling conditions,” Nowak says. “By knowing the stress a paddle can withstand in controlled lab tests and what the average force of a paddle stroke is, Gearlab can ensure that every paddle will handle tough conditions and meet customer expectations.”
Gearlab applied these results in its new Kalleq paddle (Inuit for lightning) to be released this spring. The Kalleq, which is even lighter in weight than other models, offers a new sharper edge that improves paddle efficiency and stability; and a redesigned internal carbon fiber structure that offers greater strength and durability. And Gearlab’s signature exchangeable tips are smaller and the blade slightly wider than previous models.
With these innovations, the user can go farther and faster, with less stress to the shoulder and arm joints. The tests ensure that as the paddles become lighter, they maintain Gearlab’s rigorous durability standards.
While the analysis states that the units of kilograms are a force, the paddle is actually moving the mass of water. The force on the paddle will depend on how fast the paddler is accelerating. For the purposes of this experiment, I assumed that the paddler’s acceleration was the same as the acceleration due to gravity—which is significantly more than the rate a paddler would be accelerating.
Nowak says the next step will involve refining the sensor system and analyzing paddle strength using computer models in various water conditions. He also plans to put the new flagship Kalleq paddle to further tests this summer with Gearlab’s chief engineer, Chung-Shih Sun, on a 740-mile expedition on the historic Northern Forest Canoe Trail through the Northeastern United States and Canada.
In the future, Nowak aims to work with Gearlab to establish a universal metric for paddle companies.
“While each kayak paddle company has its own internal standards for product development, Gearlab is working toward establishing a universal standard,” Nowak says. “This new standard will allow the consumer to compare the strength of paddles manufactured by different companies, the strength of various lengths and widths of Greenland paddles, and even the strength of different types of paddles—such as Euro blades versus Greenland paddles.”
For more detailed information on the Arduino-powered force sensor and field testing, visit: gearlaboutdoor.com/PaddleForceTest.