Evan A Fradenburgh

Title: **Evan A. Fradenburgh: A Pioneer in Rotor System Innovations**

Introduction

Evan A. Fradenburgh is an accomplished inventor based in Fairfield, CT, USA. With an impressive portfolio of 18 patents, Fradenburgh has significantly contributed to the field of rotor systems, particularly in the area of variable diameter rotors. His innovative designs demonstrate a deep understanding of aerodynamics and mechanical engineering.

Latest Patents

Fradenburgh's recent patents showcase his expertise in developing advanced rotor systems. One of his key inventions is a rotor system that features alternating length rotor blades and positioning. This Variable Diameter Rotor (VDR) system comprises telescoping odd and even blade assemblies, allowing for adjustable radial lengths. In this system, the odd blade assemblies define a radial length \( R_O \), while the even assemblies have a radial length \( R_E \). Notably, in a specific operating mode, the even blade assemblies can match the length of the odd ones, while in another mode, their length can be between 70% to 95% of the odd blade length. This innovative approach is pivotal for enhancing rotor efficiency and performance.

Another significant patent involves a drive system designed to change the diameter of a variable diameter rotor. This system utilizes a gear drive mechanism associated with a single coaxial shaft, enabling efficient speed adjustments of the rotor's blades. By employing a single shaft, Fradenburgh's design simplifies the hub's complexity, making it an excellent fit for gimballed rotors that demand shaft flexibility.

Career Highlights

Throughout his career, Evan A. Fradenburgh has leveraged his skills at esteemed organizations, including United Technologies Corporation and Sikorsky Aircraft Corporation. His roles in these companies have allowed him to work on ground-breaking technologies that push the boundaries of rotorcraft design and functionality.

Collaborations

Fradenburgh's inventive journey has seen collaborations with notable professionals such as Gordon G. Miller and Robert C. Moffitt. These partnerships have fostered innovation and enhanced the development of cutting-edge rotor system technologies.

Conclusion

Evan A. Fradenburgh's contributions to rotor system innovation are marked by a commitment to excellence and a passion for engineering. With a portfolio of 18 patents, he continues to influence the aerospace industry and inspire future generations of inventors and engineers. His work not only represents technological advancements but also reflects a dedication to improving the efficiency and capabilities of rotor systems.