Built in 1933 this airplane is the prototype of the Stearman Model 75 "Kaydet" biplane. The Model 70 was a blend of the Boeing 203 and the Stearman Model 6 Cloudboy and took just 60 days from idea to first flight. The Army considered the model 70s stall too gentle for a military trainer so the upper wing was modified for the desired performance and this change applied to all production Kaydets.