Paddles for propelling are double-bladed for kayaks, and single-bladed for canoes, and are usually made of carbon fiber with epoxy. For kayaks so called wing paddles are generally used, the blades of which are shaped to resemble a wing. These paddles are more efficient than traditional paddles, presumably because they create extra "lift" in the direction the kayak moves. The wing blade has undergone many evolution in the past two decades, evolving from a flatter blade to one with a more pronounced curve to better catch the water. For racing canoes, the blade will typically be short and broad, with a 'power face' on one side that is either flat or scalloped out.
The shaft will typically be longer than a tripping canoe paddle, because the kneeling position puts the paddler higher above the surface of the water. More recent designs of canoe racing paddles often have a slight bent shaft a concept of Gene Jensen in the 1950s but not to the degree used in marathon paddles. Many high-performance canoe paddlers prefer the feel of a carbon fiber shaft mated to a wooden blade, while nearly all high-performance kayak paddlers use paddles made completely of carbon fiber.
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