Cutlery and Allied Trades Research Association knowledge which is available to everyone on a competitive fee paying basis, however CATRA will enter into dialogue with consumers and users of cutlery, knives and tools where their expertise may be of help, on a free of charge basis. Petersen's Bowhunting magazine uses CATRA to measure sharpness of arrowheads. CATRA manufactures a wide range of special purpose equipment including knife and cutlery testing machines and knife sharpening systems including the CATRAHONE and CATRASHARP machines Cutlery and Allied Trades Research Association Cutlery and Allied Trades Research Association (CATRA) is an internationally known research and technology organisation in Sheffield, England which
Glenn Messer Glenn Messer Glenn Edmund Messer (July 12, 1895 – June 13, 1995) was an American aviation pioneer, responsible for major advances in the use and modification of existing aircraft and in the design and construction of aircraft and aircraft instruments. He was born in Henry County, Iowa on July 12, 1895. He began his flying career by taking lessons on a Wright biplane from aviator George Gustafson in Bay City, Michigan. Messer operated an Birmingham Municipal Airport in Birmingham, Alabama with Edward Stinson. He later operated Messer Field. In 1927 he started the Southern Aircraft Corporation which designed and built