Charles H Kaman

An innovator in the development and manufacture of helicopter technology and, following a wholly different passion, the inventor of one of the first electrically amplified acoustic guitars, died on Monday in Bloomfield, Conn. He was 91. Mr. Kaman (pronounced ka-MAN) was a 26-year-old aeronautical engineer when he founded the Kaman Aircraft Company in 1945 in the garage of his mother’s home in West Hartford, Conn. By the time he retired as chairman in 2001, he had built the Kaman Corporation into a billion-dollar concern that distributes motors, pumps, bearings and other products as well as making helicopters and their parts. A guitar enthusiast, also invented the Ovation guitar, effectively reversing the vibration-reducing technology of helicopters to create a generously vibrating instrument that incorporated aerospace materials into its rounded back. In the mid-1960s he created Ovation Instruments, a division of his company, to manufacture it. With his second wife, Roberta Hallock Kaman, Mr. Kaman founded the Fidelco Guide Dog Foundation, which trains German shepherds as guide dogs for the blind and the police. Since 1981, Fidelco has placed 1,300 guide dogs in 35 states and four Canadian provinces, said Eliot D. Russman, the foundation’s executive director. Born on June 15, 1919, in Washington, Charles Huron Kaman was the only child of Charles William Kaman and Mabel Davis Kaman. As a teenager, he loved building model airplanes from balsa wood and tissue paper and flying them in indoor competitions. He had once hoped to be a professional pilot but abandoned that ambition because he was deaf in his right ear. He received his bachelor’s degree in aeronautical engineering from the Catholic University of America in 1940. After graduating, he went to work at Hamilton Standard Propeller Corporation, a unit of United Aircraft. He soon met Igor Sikorsky, another pioneer in helicopter design, who ran United’s helicopter division and who inspired Mr. Kaman to begin developing his own parts. In addition to his daughter, Cathleen, an artist who is known professionally as Beanie Kaman, and his son William, Mr. Kaman is survived by another son, Steven; four grandchildren; and two great-grandchildren. Mr. Kaman married Helen Sylvander in 1945; they divorced in 1971. Later that year he married Roberta Hallock, who died last year.