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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.

NA-75
Role	Agricultural aircraft Type of aircraft
Manufacturer	American Airmotive
Number built	>200

Specifications

Data from Jane's All The World's Aircraft 1965-66[1]

General characteristics

• Crew: 1
• Capacity:
  
  • 31.7 cu ft (0.90 m³) 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 m²)
• 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)

References

• Taylor, John W. R. (1965). Jane's All The World's Aircraft 1965-66. London: Sampson Low, Marston & Company.
• Taylor, Michael J. H. (1989). Jane's Encyclopedia of Aviation. London: Studio Editions. p. 58.

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