Passage: The Cloudster first flew on 24 February 1921 and attempted the coast-to-coast journey in June 1921. The aircraft failed to make a non-stop journey due to engine failure. In 1923, the Cloudster was sold and modified for sightseeing flights with two additional open cockpits and seats for five passengers replacing one of the fuel tanks. In 1925 it was again sold to T. Claude Ryan, who had it modified further by adding an enclosed cabin with ten seats. It was subsequently used by a number of operators before it made a forced landing in shallow water off the coast of Ensenada, Baja California in December 1926. It was damaged beyond repair by the tide before it could be recovered.

Question: When was the Cloudster first flight?
24 February 1921