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Openclipart, also called Open Clip Art Library, is an online media repository of free-content vector clip art.The project hosts over 160,000 free graphics and has billed itself as "the largest community of artists making the best free original clipart for you to use for absolutely any reason".
Some fine art, clip art is still sold on a rights managed basis. However this type of image rights has seen a steep decline in the past 20 years as royalty free licenses have become the preferred model for clip art. Public domain images continue to be one of the most popular types of clip art because the image rights are free.
The art of paper plane folding dates back to the 19th century, with roots in various cultures around the world, where they have been used for entertainment, education, and even as tools for understanding aerodynamics. The mechanics of paper planes are grounded in the fundamental principles of flight, including lift, thrust, drag, and gravity ...
Origami paper weighs slightly less than copy paper, making it suitable for a wider range of models. Normal copy paper with weights of 70–90 g/m 2 (19–24 lb) can be used for simple folds, such as the crane and waterbomb. Heavier weight papers of 100 g/m 2 (approx. 25 lb) or more can be wet-folded. This technique allows for a more rounded ...
The Kline–Fogleman airfoil or KF airfoil is a simple airfoil design with single or multiple steps along the length of the wing. It was originally devised in the 1960s for paper airplanes. In the 21st century the KF airfoil has found renewed interest among hobbyist builders of radio-controlled aircraft, due to its simplicity of construction. [1]
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The Free Art License 1.3 has been declared compatible with CC BY-SA 4.0, [9] but incompatible with the GNU GPL. [2] It is recommended by the Free Software Foundation in the following terms: "We don't take the position that artistic or entertainment works must be free, but if you want to make one free, we recommend the Free Art License."