PBS Aerospace has entered into a multi-year subcontract agreement valued at “several tens of millions of dollars” with unmanned aerial systems firm Zone 5 Technologies Inc. to support US defense propulsion initiatives.
The agreement will strengthen domestic manufacturing of military-grade turbojet engines, leveraging established technologies developed by PBS Aerospace’s Czech-based parent company, PBS Group.
Among the company’s engine offerings are the PBS TJ40, which produces approximately 100 pounds (445 newtons) of thrust, and the more powerful PBS TJ80, capable of delivering up to 200 pounds (890 newtons).
The PBS TJ40 is 304 millimeters (12 inches) long, measures 147 millimeters (6 inches) in diameter, and weighs around 3 kilograms (7 pounds). It can operate at altitudes up to 9,000 meters (29,500 feet) and reach speeds of 988 kilometers (614 miles) per hour.
The larger PBS TJ80 measures 512 millimeters (20 inches) in length, 235 millimeters (9 inches) in diameter, and weighs 13 kilograms (29 pounds). It supports a service ceiling of 10,000 meters (32,808 feet) and can achieve a maximum speed of 1,111 kilometers (691 miles) per hour.
Both engines are engineered for quick integration into missile platforms and autonomous systems where compact size and high performance are essential.
Expanding US-Based Production
The deal follows the opening of PBS Aerospace’s US headquarters in Roswell, Georgia, in September 2025. The facility launch was backed by a $20 million investment from PBS Group owner William Didden, aimed at increasing American production capacity.
