Martin NBS-1 (MB-2) crash, Apr 21, 1923 (5 killed), Dayto...
Martin NBS-1 (MB-2) accident on April 21, 1923 near Dayton-McCook Field Ohio, United States with 5 fatalities.
- Date: April 21, 1923
- Aircraft: Martin NBS-1 (MB-2)
- Location: Dayton-McCook Field Ohio, United States
- Fatalities: 5
- Phase of flight: Takeoff and climb
A U.S. Army Air Service Martin NBS 1 went out of control in gusty winds shortly after takeoff from McCook Field in Dayton, Ohio, and crashed into the Miami River. All five occupants, including Captain Walter Ralls Lawson, were killed.