I'm prototyping my latest design - got my motor mounts put together. Other than the plate in the middle, this is the only thing that isn't out-of-the-box... but could be made very simply if they prove to be robust enough:
Am now toying with a 4+4 octo design - with 4 motors pulling, and 4 motors pushing such that the props can overlap about 2cm at the tip, but because of the over/under design never actually come close to interfering.
This is a mountain bike wheel - for a 26" wheel - the OD measures 22.5" with props @ 24.5" diam.
(am going to try using 4 pulling 880kv motors with 11x4.7 blades, and 4x850kv with 10x4.7 blades)
The next step up using the wheel design, with similar mounts, would be a road-bike wheel which measures 25"diam. and would have props @ 27"diam.
Here is the 2cm overlap from above:
I'm interested to know what behavior I might get with this combo - has anyone tried it? Am I off my rocker? Working on fixing up the center stack now. I've flown a quad with this setup before... it worked pretty well when the ESCs weren't overheating for the hot day + heavy camera load.
Feedback very appreciated!