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.
A Discord server ( https://discord.gg/b7BfHq2QJM ) has been graciously organized for this channel by https://www.youtube.com/channel/UCPMxvfpYkJoDlFjdV1HELJg and Henic.
This article is the one I found most helpful for elucidating the practical applications of wingtip motors: https://www.researchgate.net/publication/329036195_Wingtip-Mounted_Propellers_Aerodynamic_Analysis_of_Interaction_Effects_and_Comparison_with_Conventional_Layout
Someone in the comments made a very interesting suggestion, and that was that I do a fundraiser of some sort after getting a cost estimate to get actual wind tunnel time to test out various configurations and combinations and go quite a bit more in depth. If you think that this is a worthwhile endeavor drop it in the comments and I'll try to make a rational judgment on the amount of interest and lets see if this goes anywhere.