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!
~jake
Replies
few of the designs I am playing with now.... Jay, whats up with you project?
Any new development on the rimcopter ?
P1010830.JPG
Raven Y6 side.JPG
x Quad Wheel.jpg
I've been running the thought of the Y in my head and saw yours.what size rim did you use?where did you get it?did you cut it in 1/3?or what are the rim spans cut to cut?
here is my latest effort ; )
x Quad Wheel.jpg
x quad wheel b.jpg
Motor mount.JPG
Mine floats :)
the pool noodles weigh not so much...
octo wheel.jpg
here she is .... tested in 30Km gusts w/ gopro hero and FPV kit.. still flies nice and smooth :)
octo wheel.jpg
Ok... I flew the octo wheel today... Set up using octo +
4s 5000 / 22/15 900Kv / 20A ESC / 9/6 Props
The craft flew surprisingly well... overall the most stable multi I have flown to date.
Mavic 319 DISC rim 700c weight listed as 595 grams...
AUW for the octo wheel, including 4s 5000mAh 70c = 2.5 kg
Waiting for the gimble... and building landing gear... pics and video coming soon.
It's not exactly Octo... it might be at some point in the not distant future - but for now, Quad will have to do!
With the new uBlox GPS receiver, I am getting some incredible loiter accuracy... so much so that I was comfy pulling the iPhone out of my pocket and shooting a video with the transmitter largely unattended!
My original concerns that there might be too much resonant vibration seems to be unfounded - I'm happy to report! And 4 spokes seem to be perfectly sufficient to carry the central load:
humm... i thought i was the only one crazy enough to try this.... I just started to put something together last night, then found this thread.
I am using a 700c Road rim .... and I have the center stack laced into the wheel with stainless spokes.
Looks kinda cool actually, i'll snap a photo a bit later. I plan on using the spoke to lash some hardware onto.
I plan on setting it up as an octo, using 22/15 900Kv motors on 20A and 9/5.
APM 2.5.2 is running the show.
The idea is to boom a DSLR on gimble... More on that later.... did You ever get this thing to fly?
I did something similar. Pics and videos below:
Flat octo, wheel design.
Rick
awesome idea. does it fly yet? fly well?
:D