In the ten-year span of his experiments (1934–1944), Smith made some 270 launches, including at least 80 rocket mail flights.

As a boy, along with other schoolmates Smith attempted to transport live garden lizards in rockets over the swimming pool of St. Patrick's School, Asansol.

Smith made history once again, when he used his rockets to carry a food package across a river to the Quetta region, which had suffered an earthquake.

The package contained: rice, grain, spices, biris (Indian cigarettes) and 150 rocketgrams.

Stephen Smith also effected the world's first livestock transport when on 29 June 1935, a rocket carried a cock and hen together with 189 rocketgrams across the river Damodar.

The Department of Posts in India issued a commemorative stamp on 19 December 1992 honouring this Anglo-Indian pioneer of airborne mail.