The propeller has an antiqued distressed honey finish with off-white and black tips. The Sopwith's propeller hub has been punched with factory code numbers and a date. There is an authentic maker's decal. Small Sopwith Camel WWI Wooden Airplane Propeller This decorative propeller is a replica of a WWI Sopwith Camel Biplane propeller.It is sure to become a decorative & conversational addition to your decor wether hanging over the mantel or leaning against the wall in a corner. 74.25" length x 5.90" width x 3.50 H. Includes: Wall mounting bracket (please see below). Handcrafted individually, colors may vary. Aircraft propellers convert rotary motion from piston engines or turboprops to provide propulsive force. They may be fixed or variable pitch. Early aircraft propellers were carved by hand from solid or laminated wood with later propellers being constructed from metal. The most modern propeller designs use high-technology composite materials. The twisted airfoil (aerofoil) shape of modern aircraft propellers was pioneered by the Wright brothers. They found that a propeller is essentially the same as a wing and so were able to use data collated from their earlier wind tunnel experiments on wings.
They also found that the relative angle of attack from the forward movement of the aircraft was different for all points along the length of the blade, thus it was necessary to introduce a twist along its length. Their original propeller blades are only about 5% less efficient than the modern equivalent, some 100 years. The item "Airplane Sopwith Vintage Black Tips WWI Propeller 74.25 Wood Model Aircraft" is in sale since Friday, January 18, 2019. This item is in the category "Collectibles\Transportation\Aviation\Military Aircraft\Other Military Aircraft Items". The seller is "atlantisgift" and is located in New York.This item can be shipped to United States, Canada, United Kingdom, Denmark, Slovakia, Bulgaria, Czech republic, Finland, Hungary, Latvia, Lithuania, Malta, Estonia, Australia, Portugal, Cyprus, Slovenia, Japan, China, Sweden, South Korea, Taiwan, Thailand, Belgium, France, Hong Kong, Ireland, Netherlands, Poland, Spain, Germany, Austria, Bahamas, Israel, Mexico, New Zealand, Philippines, Singapore, Switzerland, Norway, Saudi arabia, United arab emirates, Qatar, Kuwait, Bahrain, Colombia, Costa rica, Panama, Guatemala, Honduras, Uruguay.