Smithsonian Report. 1955.- Hunsaker 



Plate 3 



1. Application of NACA cowling on AT-5A Army pursuit training plane increased its speed 

 from 118 to 137 mph. This was equivalent to providing 83 additional horsepower. 



2. I'he NACA Lant.'le\- Laboratdi \ "s li^w-dia^' wiiiL' was first used on the P-S 1 Mustang 

 fighter, making it the fastest pr(.peller-dri\en airplane of World War 11. 



