Aircraft fabric covering often used in the restoration of older types that were originally covered using traditional methods. The purposes of the fabric covering of an aircraft are: Pioneering aviators such as George Cayley and Otto Lilienthal used cotton-covered flying surfaces for their manned glider designs. The Wright brothers also used cotton to cover their Wright Flyer. Other early aircraft used a variety of fabrics, silk and linen being commonly used. Some early aircraft, such as A.V. Roe's first machines, even used paper as a covering material. Until the development of cellulose based dope in 1911 a variety of methods of finishing the
Marlan (fabric) According to the European Standard EN 373 or the new one EN ISO 9185 the fabric has the maximum value D3 for protection against aluminium splashes and E3 for iron splashes. The wool blend with a flame retardant fiber provides thermal insulation characteristics while avoiding the molten metal sticking to the fabric, which was the main problem of pure synthetic or natural fibers used in the past. Currently there are different types and developments of Marlan, developed according to specific risks in foundries: Marlan (fabric) Marlan is a registered trademark for inherent flame retardant fabric (UNE EN 11612) used in