Eufaula, Alabama. Eufaula is the largest city in Barbour County, Alabama, United States.
Leonardo da Vinci (1452â1519) is generally credited with inventing the helicopter, but the first practical design was developed only in the 1930s by Russian-born Igor Sikorsky (1889â1972). Today, typical uses for helicopters include military transportation and air-sea rescue.eonardo da Vinci (1452â1519) is generally credited with inventing the helicopter, but the first practical design was developed only in the 1930s by Russian-born Igor Sikorsky (1889â1972). Today, typical uses for helicopters include military transportation and air-sea rescue.
Who invented the first successful helicopter and in what year was it invented in? Igor Sikorsky, a Russian- American immigrant invented the first successful helicopter, model number VS-300. There is no specific invention date but it was first test flown i â¦ n September 14, 1939 and had to be tethered by cables because of its instability. The VS-300 was the first to use modern-day rotary blade designs.