Otto Aerospace has completed the Preliminary Design Review (PDR) for its Phantom 3500, a technical milestone that advances the clean-sheet business jet programme from conceptual design into detailed design and production planning. The review was conducted during the last week of February at Otto Aerospace's future home in Jacksonville, Florida.

The PDR provided a comprehensive assessment of the Phantom 3500's configuration, architecture, performance and overall design maturity across systems and structures. It also allowed Otto to freeze the aircraft's aerodynamic design and major interfaces, giving engineering and supplier teams the definition needed to support the next phase of work.

“This is an important step for our team,” explains Otto Aerospace president and CEO Scott Drennan. “Engineers often feel like PDR is a test, but I look at it as a celebration of their amazing work. And, yes, they passed the test with flying colours. The Phantom 3500 has crossed the threshold from a promising concept to an aircraft we are preparing to build and fly. You can see it in the digital model, in the hardware we have built and in the maturity of the programme. The work now is execution. We are focused on building this aircraft on time, while proving that our laminar-flow aircraft can do exactly what we said it would do.”

Otto now advances the programme into detailed design and engineering release, setting the stage for hardware fabrication and assembly as the company prepares for first flight of Flight Test Vehicle 1 in 2027. The flight test programme will support Otto's broader effort to demonstrate the producibility and performance of its applied laminar-flow technology, which is engineered to radically reduce the energy required for flight and form the foundation for a new category of highly efficient and sustainable aviation.

“Completing PDR reflects more than a year of disciplined work by the Otto team, our suppliers and our development partners,” states Otto Aerospace chief technology officer Kyle Heironimus. “Aircraft development depends on thousands of decisions made with speed, quality, safety and certification rigour in mind. I'm proud of how this team worked together to reach this milestone and put the Phantom 3500 in position for the next phase of execution.”

As the programme moves from PDR toward Critical Design Review (CDR) and aircraft build, Otto will remain focused on the work required to turn the Phantom 3500 into a certified production aircraft, including disciplined weight management, supplier execution, certification planning and protection of the aircraft's core performance targets.

“The aviation world has dreamed of practical laminar-flow flight for years,” Drennan concludes. “With PDR complete, we are one major step closer to delivering it.”