I was already crazy...DIYDRONES made it worst ! The story...part 1
My friend is a senior aerospace engineer at the aircraft certification division of Transport Canada and I am an aircraft maintenance engineer working also for Transport Canada as a civil aviation safety inspector.
That day, I challenged him into a project and he said with a smile; I hate you !
Since then, according to our wives, we are crazier then ever. We are now obsessed into accumulating enough honey-do list points to buy free time to go forward with our project.
I posted here a few pictures to tease your curiosity. If you want to play with me until the end you will get the complete story and details about what we created. All because of what DIYDRONES put in our heads.
We are planning to give most of it to the open sources community.
br/>For me it started by looking and drawing on an autocad 2009 computer screen. Did I mentioned also self learning how to use autocad?
One of my neighbor, also a friend, bought from China, on Ebay, a $1500.00 CNC machine knowing that I would learn how to use it and then teach him. Sure... but before I had to put together a computer powerful enough from some of the junk found in my garage. Could not wait to find a case for it.
After going through a few online tutorials (or was it a lot?) about Mach 3 CNC software, Sheetcam CAM software, stepper motors and controllers, etc. I ended up with my case less computer showing this screen;
and a noisy set up doing that; At least that is what my neighbors complains at 3 o'clock in the morning, you know ! CNC, router and vacuum noises.
Realizing that honey-do points are very hard to accumulate, we decided to start with cheap and easily available trex rc helicopter parts and built around it. Also we had the wisdom to start with a mock-up made with acrylic instead of wasting some very exotic and expensive material like carbon fiber. I think they call that the learning curve.
But what is that gizmo?
The continuation of our story will be by acclamation from you guys or it will die with this post...
Are you curious? Did DIYDRONES made you crazier to? Maybe we should consider a class action for it to stop...
Cheers!
Mario
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JDrones Comment by Jani Hirvinen on September 28, 2010 at 9:18pm -
Propellers or propellers... How about kinda ducted fan type props like in Avatar movie they have those flying coaxial helis. I would loooove to see the prop mounts and how it works. I'm quite sure it will look like in Avatar but with 4 prop mounts
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Comment by Simon on September 29, 2010 at 3:02am -
Oooh I like that idea !!
Anyhow, back to the Mario mechanics. Forget the differential drive interpretation; those central gears (4 small blue) are all meshed which will give not differential capability but synchronized drives. Also the belt drives to any outrigger props cannot be varied independently so no apparent pitch or roll correction.
This begins to look more like a twin contra-rotating rotor drive.
Maybe Jani is on to something.
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Comment by Zak on September 29, 2010 at 5:03am
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Except they AREN'T counter-rotating. The motors and large drive gears are geared to turn in the same direction. Like you say, the four gears in the middle mesh.
I'm curious to:
* see why the motors can pivot away from the gears they drive;
* see what the four gears in the centre actually do drive;
* see what runs on the 8 pairs of bearings mounted sort-of-radially.
The comments about integrating (something) into a closed loop is making me want to see some sort of clever relative motion something which turns relative to the central axis of what we can see, and causes an effective control of a counter-rotating (something-else). But then I'm getting carried away.
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JDrones Comment by Jani Hirvinen on September 29, 2010 at 7:52am -
Zak, yep i think so too.. they all rotate on same direction. Ok you can change rotation by rotating belt 180° in tube just like we are doing on traditional helis. You need to twist it 90° anyway but which direction that's the question
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Comment by hopslink on September 29, 2010 at 11:02am
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If you mesh 4 gears like that you get 2 clockwise and 2 anti-clockwise drives while the drive motors both spin in the same direction.
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Comment by Joe Bloeski on September 29, 2010 at 1:22pm
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I can't take it anymore post more now, pretty please!
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Comment by Mario on September 29, 2010 at 2:10pm
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OK. one last set of pics before part 2.
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Comment by Mario on September 29, 2010 at 2:11pm
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duplicate...sorry
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Comment by Joel on September 29, 2010 at 2:22pm -
a giant coaxial variable pitch uav? lol i dunno.
you've got me, i have no idea. it does kindof seem like the disks will be rotating which i find strange, but i can't wait to see part 2!
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Comment by ramboky on September 29, 2010 at 3:32pm -
It's quite obviously a high speed, motorised "Lazy Susan" (http://en.wikipedia.org/wiki/Lazy_Susan) for serving Chinese food.
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