It could be said that the beginning of the worlds Helicopter Industry can be attributed to the established concepts and principles that were utilized in the design of this helicopter. This helo is said to have been the first sucessful helicopter in the world to perfect a now familiar design concept. This helo was piloted to a new world endurance record which was considered a feat for the day and age. The helicopter also underwent several major configuration changes until the early 1940,s at which time it flew in it,s final configuration.During it,s career it logged 102 Hrs, 35 min, and 51 seconds of flight time. Name this Helo. Answer by PM only. No changing of an answer after original submission. Do not answer " Was It " or with a question mark. Any answer submitted after 1200 hrs E.S.T the day the answer will post will not count. Answer will post at 1200 hrs E.S.T on Friday 01 / 05 / 07.