Some lie awake at a night stuff for like minded individuals. Is drag coefficient ever measured and published for kayaks? It would be good to know if kayak A took 1.5X the power to move along as kayak B. Some random thoughts on how: (assuming ideal test conditions and equal weight on board).
- tow with a boom from boat to a given speed. Release and measure deceleration (I read one study where this was used)
- tow with boat and boom to a given speed. Attach a scale in cable, or at fulcrum point on boom on boat. Measure average resistance/weight for given speed.
- using a bridge, tower, or building next to water, attach a weight high in air to cable and pulley, to a fixed pulley at water level, with cable attached to kayak at a distance from pulley. Drop weight and measure time and speed to pull kayak over given distance, or determine weights needed to pull different kayaks at the same speed.
- find a place where water is flowing steadily through a sluice. Tether kayak in water flow to fixed point with cable and scale. Measure weight/resistance reading for different kayaks.
- attach an electric motor and propeller to kayak. Measure kayak speed for given motor output, or measure power needed to achieve certain speed.
Probably the easiest and most obvious I have failed to envision, or perhaps there is a standard method out there. Someone kindly enlighten me. Thanks.