The first successful aerial refueling takes place when a DH-4B carrying Lts. Virgil Hine and Frank W. Seifert passed gasoline through a hose to another DH-4B flying beneath it carrying Lt's Lowell H. Smith and John P. Richter. More
It is interesting to also note that in 1921, the first successful transfer of fuel albeit, unconventional. between two biplane planes took place a wing walker climbed from one to the other plane with a five-gallon can of gasoline strapped to his back and successfully transferred the fuel. Learn more about this event
