title: American Airmotive NA-75
text: # American Airmotive NA-75
  
  The American Airmotive NA-75 was an agricultural aircraft marketed in the United States in the 1960s, created by remanufacturing military surplus Boeing Stearman trainers. The aircraft were fitted with completely new, high-lift wings, and one of the cockpits was replaced by a chemical hopper. As of 1980, over 200 Stearmans had been modified in this way, either by American Airmotive directly, or via conversion kits that the company sold.
  
  ## Specifications
  
  Data from Jane's All The World's Aircraft 1965-66
  
  General characteristics
  
  * Crew: 1
  * Capacity:
     * 31.7 cu ft (0.90 $m^3)$ hopper
     * >2,000 lb (910 kg) payload
  * Length: 24 ft 9 in (7.54 m)
  * Upper wingspan: 33 ft 0+1⁄2 in (10.071 m)
  * Lower wingspan: 29 ft 5 in (8.97 m)
  * Wing area: 338.26 sq ft (31.425 $m^2)$
  * Airfoil: Gottingen 398
  * Max takeoff weight: 4,612 lb (2,092 kg)
  * Powerplant: 1 × Pratt & Whitney R-985 radial engine, 450 hp (340 kW)
  
  Performance
  
  * Stall speed: 55 mph (89 km/h, 48 kn) with 1,250 lb (570 kg) payload
  * Rate of climb: 1,100 ft/min (5.6 m/s)
  