![](https://www.historynet.com/wp-content/uploads/2006/06/Hap-Wright-960_640.jpg)
Arnold and Milling prepare to take off in a Wright ModelC—one of two aircraft in the Signal Corps inventory—in 1911. (Courtesy C.V. Glines)
Arnold and Milling prepare to take off in a Wright ModelC—one of two aircraft in the Signal Corps inventory—in 1911. (Courtesy C.V. Glines)