Location History:
- Northridge, CA (US) (1984)
- Cincinnati, OH (US) (2019 - 2023)
Company Filing History:
3 out of 51,907 
1 out of 832,843 Years Active: 1984-2025
Title: David Baker Riddle: Innovator in Unducted Propulsion Systems
Introduction
David Baker Riddle is a notable inventor based in Cincinnati, OH (US). He has made significant contributions to the field of propulsion systems, holding a total of 4 patents. His work focuses on enhancing the efficiency and performance of unducted propulsion systems.
Latest Patents
One of Riddle's latest patents is for an unducted propulsion system. This innovative system includes an aft housing designed for low drag, enabling high subsonic sustained flight. The system features a plurality of blades affixed to the aft housing, which defines a flowpath curve extending from the axial extent of the aft blade root to the aft end of the housing. The flowpath curve is characterized by an axial direction parallel to an axis of rotation and a radius from that axis. Notably, the curve includes a first point where the radius reaches a maximum aft of the blade root and a second point forward of the first point where the radius stops decreasing. The ratio of the first radius to the second radius is greater than or equal to 1.081.
Career Highlights
Throughout his career, David Baker Riddle has worked with prominent companies, including General Electric Company. His experience in the industry has allowed him to develop and refine his innovative ideas in propulsion technology.
Collaborations
Riddle has collaborated with talented individuals such as Syed Arif Khalid and Daniel Lawrence Tweedt. These partnerships have contributed to the advancement of his projects and the successful development of his patents.
Conclusion
David Baker Riddle is a distinguished inventor whose work in unducted propulsion systems showcases his innovative spirit and technical expertise. His contributions to the field are significant and continue to influence advancements in propulsion technology.