The Scout was to be the weight-carrying machine, designed to carry two pilots and 450 pounds of equipment for four hours. Climb rate for this craft was only 2,000 feet per ten minutes, at a minimum speed of 45 miles per hour. The Speed Scout was to carry one pilot for one hour, achieving a climb to 1,800 feet in three minutes while sustaining a speed of 65 miles per hour. An additional requirement for the “largest possible field of vision” reflected requirements for an airplane with a reconnaissance mission.62 Thus, nascent airpower doctrinal applications determined which airplanes and which technological capabilities were requested and purchased by the Army Signal Corps in 1912. It was Arnold who wrote the requests based upon conversations with other fliers and upon his understanding of air doctrine as it existed at the time.63