He was one of the automotive world's greatest engineering talents. His designs dominated countless races, spawned many successful rivals and influenced every other engine designer in the world. Thanks Keith. 
from http://www.cosworth.com/:
Keith Duckworth: 1933 - 2005
Cosworth is sorry to record that its founder, Keith Duckworth, died on Monday, 19th December 2005. He was 72 years old.
Along with his life-long colleague and friend, Mike Costin, he had set up Cosworth Engineering in 1958, and guided it to world-wide fame in the field of high-performance automotive engineering.
It was Keith who personally designed the legendary Cosworth DFV V8 Formula One engine which, with 155 GP victories, is the most successful engine ever to be used in the sport.

from http://www.cosworth.com/:
Keith Duckworth: 1933 - 2005
Cosworth is sorry to record that its founder, Keith Duckworth, died on Monday, 19th December 2005. He was 72 years old.
Along with his life-long colleague and friend, Mike Costin, he had set up Cosworth Engineering in 1958, and guided it to world-wide fame in the field of high-performance automotive engineering.
It was Keith who personally designed the legendary Cosworth DFV V8 Formula One engine which, with 155 GP victories, is the most successful engine ever to be used in the sport.
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