Otto Aerospace Clears Preliminary Design Review for Phantom 3500 Laminar-Flow Jet
BY Composights
Published: 19 May 2026
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US-based aerospace startup Otto Aerospace has completed the preliminary design review (PDR) for its Phantom 3500 aircraft, advancing the clean-sheet business jet program into detailed engineering, production planning, and hardware fabrication activities.
The review assessed the aircraft s overall configuration, aerodynamic architecture, systems integration, and structural maturity, allowing the company to freeze the baseline design ahead of the next development phase. Otto Aerospace is targeting first flight of its Flight Test Vehicle 1 in 2027.
The Phantom 3500 is built around laminar-flow aerodynamic technology intended to reduce drag by maintaining smooth airflow across large portions of the airframe. According to the company, the aircraft is designed to cut fuel burn by more than 60% compared with conventional business jets in the same category. The platform also incorporates precision-engineered all-carbon-fiber composite structures designed to maintain extremely smooth aerodynamic surfaces required for sustained laminar flow performance.
Otto Aerospace stated that the aircraft will cruise at approximately 590 mph with a planned operating altitude of 51,000 feet. The Phantom 3500 is also expected to achieve a range of roughly 3,500 nautical miles while supporting lower operating costs and reduced emissions through aerodynamic efficiency improvements.
The aircraft features an unconventional fuselage architecture with a digitally enabled cabin environment replacing traditional passenger windows in portions of the aircraft. The company claims the design helps minimise aerodynamic disruption and structural penalties associated with conventional window openings.
Otto Aerospace plans to manufacture the Phantom 3500 at its planned one-million-square-foot production campus in Jacksonville, Florida, where the company intends to integrate automation, digital manufacturing systems, and precision assembly technologies required for laminar-flow aircraft production.
The development highlights growing aerospace industry interest in advanced composite-enabled aerodynamic architectures, where highly smooth carbon-fiber airframe structures are being used to support next-generation fuel-efficient aircraft concepts focused on drag reduction, lower emissions, and extended flight range.
Source: Otto Aerospace | News
