Can Wingtip Motors Improve Aircraft Efficiency? RCTestFlight Solar Collaboration Part 1

For an upcoming collaboration with RCTestFlight I am testing out the difference in efficiency between wingtip motors and motors placed mid wing.   We also have a little fun with smoke grenades, though test flights don't always go as planned.

Thanks to Sarah Tan for the video edit.

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This article is the one I found most helpful for elucidating the practical applications of wingtip motors:  https://www.researchgate.net/publicat...