James A. (Jim) Chamberlin (1915-1981) was a Canadian aerodynamicist who contributed to the design of the Canadian Avro Arrow, NASA Gemini space capsule and Apollo LEM. In addition to his pioneering air and space efforts, he is often cited as an example of Canadian brain drain to the U.S. Wikipedia
The definitive Wikipedia entry for Jim Chamberlin. Wikipedia is the biggest multilingual free-content encyclopedia on the Internet. en.wikipedia.org/wiki/Jim_Chamberlin