40B (NACA cowling)
Aircraft Registration Number
MS-223: William F. Yeager Aviation Collection
Left hand side view of the Boeing Model 40B (NACA cowling), a civilian aircraft, on the ground. Note on back "Boeing Model 40A modified to Model 40B, with NACA cowling."
Special Collections and Archives; Wright State University Libraries
Digital Services Department; Wright State University Libraries
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ms223_033_013_004; Boeing 40B; NACA cowling; NC-270; Civilian; Wichita (Kansas)