BRASILIA, Brazil — Brazilian aircraft manufacturer Embraer and U.S. company Boeing say they've agreed to share technical knowledge and market assessments on the development of a Brazilian military cargo plane.

Embraer hopes its KC-390 plane will eventually replace Lockheed Martin's Hercules C130 as the globe's most widely used military transport aircraft.

Financial details of the deal signed Tuesday weren't released.

Boeing says it's part of a broader agreement including cooperation "in commercial airplane efficiency and safety, research and technology, and sustainable aviation biofuels."

Embraer says it has letters of intent from various nations to buy 60 of the KC-390s. The company hopes to sell 100 of the planes over 20 years.

Embraer says the first test flights of the KC-390 will occur in 2014. First deliveries are expected in 2016.