Cul de canard Cul de canard Cul de canard (CDC) (French for "duck bottom") are the feathers from the back of a duck directly around the preen gland (uropygial gland); they are very buoyant due to preen oil produced by the preen gland. They are used when tying dry flies for fly fishing. They owe their buoyancy to their proximity to the ducks preen gland which secretes an oil distributed by the duck as a cleaning and waterproofing measure. It is unnecessary for the angler to add additional oil by way of floatant. Flies incorporating CDC are easy to dress requiring no floatant
Aviafiber Canard 2FL to design a dedicated motor-glider version as the Canard Aviation Canard SCM, powered by a engine. Farner had previously designed a motor-glider using the 2FL concept as the Farner HF Colibri 1 SL, which first flew in 1979. The designer, Hans Farber, was killed flying one of their aircraft, prompting business partners to withdraw the Canard 2FL, Canard SC and Canard SCM from sale, buying back the small number that had already been sold. Aviafiber Canard 2FL The Aviafiber Canard 2FL was a one-person recreational aircraft of highly unusual design, designed and built in Switzerland during the late 1970s and