deaths
Frank Piasecki, American engineer (born 1919)
Related Wikipedia articles
Frank Piasecki
American aerospace engineer (1919–2008)
Frank Nicolas Piasecki was an American engineer and helicopter aviation pioneer. Piasecki pioneered tandem rotor helicopter designs and created the compound helicopter concept of vectored thrust using a ducted propeller.Source: Wikipedia (CC BY-SA)
February 11
Day of the year
February 11 is the 42nd day of the year in the Gregorian calendar; 323 days remain until the end of the year.Source: Wikipedia (CC BY-SA)