Boeing Model 320

The Boeing Model 320 was a late 1930s project by Boeing for a giant maritime patrol flying boat.

The design of the Boeing Model 320 featured a giant flying boat with twin hulls. The crew of eight was seated in a nacelle in the wing center section.^[1][2]

• Crew: 8
• Wingspan: 200 feet
• Powerplant: Six 1,200 hp Wright R-2600 Twin Cyclone engines.
• Length: 116 ft
• Gross weight: 134,000 lb

• Fielding, J. P. (1999). "Conceptual Design Methodologies for Waterborne and Amphibious Aircraft" (PDF). Cranfield University Air Vehicle Technology Group. p. 128. Retrieved August 4, 2025.

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