We extend our recent electric propeller ground-effect study to consider a circular ground-plate, instead of planar-surface of assumed infinite extent. Parameter studies include propeller to plate diameter ratio, propeller diameter to ground-offset ratio, and propeller pitch to diameter ratio. As with classical ground effect, benefits of thrust-augmentation and/or power-reduction with proximity to the ground, depend on the propeller pitch to diameter ratio, with stronger ground-effect for smaller pitch to diameter ratio. Flow visualization suggests on/near the ground-plate suggests a projected dividing-streamline, external to which, the flow is largely radial. A ground-plate of half of the propeller diameter was found to have minimal distinction from that of an unimpeded free-stream, while when the plate and propeller have the same diameter, the resulting ground-effect already resembles that of the infinite-plate. © 2020 American Institute of Aeronautics and Astronautics Inc, AIAA. All rights reserved.