College - Author 1

College of Engineering

Department - Author 1

Mechanical Engineering Department

Degree Name - Author 1

BS in Mechanical Engineering

College - Author 2

College of Engineering

Department - Author 2

Mechanical Engineering Department

Degree - Author 2

BS in Mechanical Engineering



Primary Advisor

John G. Fabijanic, College of Engineering, Mechanical Engineering Department

Additional Advisors

Russell V. Westphal, College of Engineering, Mechanical Engineering Department


This document contains the background information, defined scope of work, preliminary design philosophy, conceptual design development, and final design choices along with its corresponding manufacturing and design verification plans. It also includes the preliminary testing and prototyping necessary in bringing our verification prototype to its final configuration for delivery. Finally, it includes the entire manufacturing process followed in creating the final project and the extensive testing performed to ensure it meets the defined engineering specifications. The aerodynamic phenomenon being analyzed and demonstrated in our final deliverable can be seen in a scenario where when a propeller is enclosed in a duct, the duct inlet itself will experience a thrust force whenever the flow speed within the inlet differs from that further upstream—this force is commonly known as “lip thrust.” The goal of this project is to create a new and improved apparatus that qualitatively and quantitatively demonstrates this effect in a classroom setting and in the Cal Poly Fluids Lab wind tunnel. To begin, the previously semi-functional apparatus was analyzed and used in combination with information from Dr. Westphal to define the engineering specifications - which are summarized to explicitly define the project scope of work. The process taken to develop a conceptual design is outlined through an extensive process of ideating based on functional requirements, refining those ideas, and evaluating them objectively to define a specific design direction for our first proof of concept prototype. Extensive details for the final design along with its manufacturing process, assembly, and design validation testing to verify its ability to meet specifications is included.