At the world’s largest (virtual) event for unmanned and autonomous systems, you’ll find your momentum, that something extra that gives you a competitive edge – your X factor.

Only AUVSI XPONENTIAL 2020 allows you to discover groundbreaking innovation, immerse yourself in new ideas, gain new perspectives and experience everything you need to elevate your business from the comfort of your own home.
Defense Energy Agriculture Retail + Logistics Public Safety Transportation Communications Mapping + Surveying Oil + Gas Construction Automated Vehicles Mining
From energy to transportation and construction to defense, join the unmanned systems community including users, technologists and policymakers to collaborate on ideas, share lessons learned and build new partnerships. SEE WHO ATTENDS
Explore today’s proven capabilities and tomorrow’s advancements through virtual exhibits, community Q&A, and roundtable discussions with hundreds of manufacturers and service providers. SEE WHO'S EXHIBITING
Get practical solutions and easily implementable ideas you can put into action right away through live-streamed and on-demand educational sessions covering the industry’s most pressing topics.

Welcome to your XPONENTIAL Exhibitor Console!

The Exhibitor Console is your XPONENTIAL hub for all the information you need to know – from deadlines to promotional items - in one convenient location.

Important Dates and Information

Virtual Platform Launch

Note: only registered attendees can access the virtual platform and virtual booth. 

September 28, 2020

Virtual Platform Coffee Talk

  • Zoom Link 
  • Meeting ID: 865 9877 2303
  • Passcode: 447699
  • Phone: +1 301 715 8592

October 1, 2020

1:00pm EST

XPONENTIAL 2021 Rebook

Rebook will take place during XPONENTIAL 2020. You will receive an email by Thursday, October 5 with your rebook time. This will be the time that you can log into the system and select your physical booth location for XPONENTIAL 2021 scheduled for Atlanta May 3-6.

October 7-8, 2020

Use our Promotional Toolkit to share your participation at XPONENTIAL and give your customers a discounted registration with code EXHOFFXPO20!

Unmanned eVTOL Propulsion Scalability: Thermal Characterization of UAS Motors via Experimentation

  • Session Number:2088
Tuesday, October 06, 2020: 12:05 PM - 1:00 PM


Poster Presenter
Blake Stringer
Associate Professor
Kent State University


This paper details the results of experimental heat studies on sUAS electric motors. Electric motors produce heat directly proportional to the amount of power being produced. Since hovering flight is a high-power flight condition, electric vertical takeoff and landing (eVTOL) motors can produce large amounts of heat. Depending upon the power conditions, these high temperatures have resulted in smoke, fire, or other damage to the motors themselves. The problem can become compounded upon motor shutdown, when direct airflow around the motor ceases immediately upon landing. This is a common technique with multi-rotor UAVs to prevent the aircraft from tipping during landing and causing damage to the rotors or other structure. The growth of multi-rotor air platforms for larger payload capacities, such as unmanned logistics delivery vehicles or emergency response vehicles, as well as their potential in Urban Air Mobility aircraft development, only increases the power requirements on eVTOL motors. Therefore, it is critical to understand the relationship between electric motors, power, and heat and to develop thermal management strategies to alleviate these known or observed problems. The focus of this research has been to experimentally capture the transient and steady-state thermal characteristics of eVTOL motors under different power settings. Particularly, we focus on the temperature of the rotor-motor system at and immediately after shutdown, the resulting temperature spikes, the time it takes to reach that maximum temperature, and the time it takes to cool down. Additionally, we employ different thermal management procedures to mitigate heat spikes upon shutdown. This paper will provide background information of the problem, a description of our experimental apparatus at Kent State University, some of our experimental results, and their implications for the eVTOL community. This paper is an extension and continuation of results presented at AUVSI XPONENTIAL 2019 in Chicago by Kendy Edmonds and Blake Stringer, titled, “Unmanned VTOL Propulsion Research – Scalability of Quadcopter Rotor-Motor Configurations Outside the sUAS Regime.”

Super Tracks:

Job Role:
Analyst,Engineering/Technical,Research & Development