Air Chief Marshal Dilbagh Singh PVSM, AVSM, VM (March 10, 1926 – February 9, 2001) was the head of the Indian Air Force from 1981 to 1984, as Chief of the Air Staff. He was the second Sikh to hold that position. Dilbagh Singh was commissioned as a pilot in 1944. His operational flying career spanned the Spitfire to introducing the MiG-21 into service in India. He had earlier made the first official "Supersonic Bang" over India in New Delhi when the Mystere IV-A was showcased in a public demonstration. He served as India’s Ambassador to Brazil from 1985 to 1987.