diydrones2024-03-28T20:22:04Zhttps://diydrones.com/group/vanguard_paradigm/forum/feed/allThe developing Aluminum-Air Battery, This could revolutionize Drones/Multirotors !https://diydrones.com/group/vanguard_paradigm/forum/the-developing-aluminum-air-battery-this-could-revolutionize2015-05-10T21:03:57.000Z2015-05-10T21:03:57.000ZJ Smithhttps://diydrones.com/members/JSmith871<div><p>Still in the developing stages, and more than one type, the right kind of Aluminum-Air battery could change everything for Drones/Multirotors.</p><p>Some say that such a battery would have a "low discharge rate" for use in Drones/Multirotors - but reinterpreted, a "SLOW discharge rate" is a lemon waiting to be made into lemonade.</p><p>Because it would have a low/slow discharge rate, you would have to increase the overall battery assembly, either in the size or number of batteries or cells. - <strong>That's not a bad thing, that's a <span style="text-decoration:underline;">GOOD</span> thing !</strong></p><p>If you could use the right kind of Aluminum-Air battery(ies), when you made up in overall battery power to make it useful for Drones/Multirotors, due to the potentially very light weight, you might end up with as much total battery weight as you would have with whatever batteries you are using now.</p><p><strong>- Still think this is a bad thing, or going nowhere???</strong></p><p>Bottom Line: You might end up with somewhere around the same weight in batteries, but because you actually have more battery reserve (Due to including more batteries or battery cells, in turn due to the low/slow discharge rate) <strong><span style="text-decoration:underline;">You could in the end have a much longer flight duration</span> !</strong></p><p><strong>- and that is a very GOOD thing !</strong></p><p>Sample videos from Youtube...</p><p></p><p><a href="https://www.youtube.com/watch?v=nnJlwrhye9I">https://www.youtube.com/watch?v=nnJlwrhye9I</a></p><p></p><p><a href="https://www.youtube.com/watch?v=_FxIzMwOF00&list=PLKoiep94Lzz6Jjrjh9tRj3X0bsumfxuQS&index=15">https://www.youtube.com/watch?v=_FxIzMwOF00&list=PLKoiep94Lzz6Jjrjh9tRj3X0bsumfxuQS&index=15</a></p><p></p><p><a href="https://www.youtube.com/watch?v=8Q_yIhiKboE&list=PLKoiep94Lzz6Jjrjh9tRj3X0bsumfxuQS&index=16">https://www.youtube.com/watch?v=8Q_yIhiKboE&list=PLKoiep94Lzz6Jjrjh9tRj3X0bsumfxuQS&index=16</a></p><p></p><p><a href="https://www.youtube.com/watch?v=8Q_yIhiKboE&list=PLKoiep94Lzz6Jjrjh9tRj3X0bsumfxuQS&index=16">https://www.youtube.com/watch?v=8Q_yIhiKboE&list=PLKoiep94Lzz6Jjrjh9tRj3X0bsumfxuQS&index=16</a></p><p></p><p>Other sources:</p><p><a href="http://www.wallstreetdaily.com/2015/01/16/aluminum-air-battery-phinergy/">http://www.wallstreetdaily.com/2015/01/16/aluminum-air-battery-phinergy/</a></p><p></p><p><a href="http://www.brighthub.com/environment/renewable-energy/articles/117074.aspx">http://www.brighthub.com/environment/renewable-energy/articles/117074.aspx</a></p><p></p><p><a href="http://www.wallstreetdaily.com/2015/01/16/aluminum-air-battery-phinergy/">http://www.wallstreetdaily.com/2015/01/16/aluminum-air-battery-phinergy/</a></p></div>Sense and Avoid / Obstacle Avoidancehttps://diydrones.com/group/vanguard_paradigm/forum/sense-and-avoid-multi-rotor-project-demonstration-university-of2015-05-10T20:48:55.000Z2015-05-10T20:48:55.000ZJ Smithhttps://diydrones.com/members/JSmith871<div><p></p><p>Multi-rotor Project Demonstration - University of Southampton:</p><p><a href="https://www.youtube.com/watch?v=71vLnFHfgtw&list=PLKoiep94Lzz6Jjrjh9tRj3X0bsumfxuQS&index=40">https://www.youtube.com/watch?v=71vLnFHfgtw&list=PLKoiep94Lzz6Jjrjh9tRj3X0bsumfxuQS&index=40</a></p><p></p><p><span class="watch-title" dir="ltr" title="Multirotor stereo odometry and obstacle avoidance">Multirotor stereo odometry and obstacle avoidance:</span></p><p><span class="watch-title" dir="ltr" title="Multirotor stereo odometry and obstacle avoidance"><a href="https://www.youtube.com/watch?v=gEHqIn_pGM0">https://www.youtube.com/watch?v=gEHqIn_pGM0</a></span></p><p></p><p></p></div>V-tail control surface deflections explained - Think Multirotor - Get it?https://diydrones.com/group/vanguard_paradigm/forum/v-tail-control-surface-deflections-explained-think-multirotor-get2015-05-10T20:42:09.000Z2015-05-10T20:42:09.000ZJ Smithhttps://diydrones.com/members/JSmith871<div><p></p><p><a href="https://www.youtube.com/watch?v=vHWnX_PLhlQ&list=PLKoiep94Lzz6Jjrjh9tRj3X0bsumfxuQS&index=28">https://www.youtube.com/watch?v=vHWnX_PLhlQ&list=PLKoiep94Lzz6Jjrjh9tRj3X0bsumfxuQS&index=28</a></p><p></p></div>Helicopter (Multirotor?) Speed Limit - Beyond educational, I love the visual art of this !https://diydrones.com/group/vanguard_paradigm/forum/helicopter-multirotor-speed-limit-beyond-educational-i-love-the2015-05-10T20:38:51.000Z2015-05-10T20:38:51.000ZJ Smithhttps://diydrones.com/members/JSmith871<div><p></p><p><a href="https://www.youtube.com/watch?v=_pbdwueqGp4&list=PLKoiep94Lzz6Jjrjh9tRj3X0bsumfxuQS&index=22">https://www.youtube.com/watch?v=_pbdwueqGp4&list=PLKoiep94Lzz6Jjrjh9tRj3X0bsumfxuQS&index=22</a></p><p></p></div>Another way or reason for a drone to perch on something...https://diydrones.com/group/vanguard_paradigm/forum/another-way-or-for-a-drone-to-perch-on-something2015-05-10T20:25:51.000Z2015-05-10T20:25:51.000ZJ Smithhttps://diydrones.com/members/JSmith871<div><p></p><p>Perching on a power line - to recharge...</p><p><a href="https://www.youtube.com/watch?v=1BUui48KPHs&list=PLKoiep94Lzz6Jjrjh9tRj3X0bsumfxuQS&index=12">https://www.youtube.com/watch?v=1BUui48KPHs&list=PLKoiep94Lzz6Jjrjh9tRj3X0bsumfxuQS&index=12</a></p><p></p></div>Truly advanced to the point of being scary...https://diydrones.com/group/vanguard_paradigm/forum/truly-advanced-to-the-point-of-being-scary2015-05-08T01:29:08.000Z2015-05-08T01:29:08.000ZJ Smithhttps://diydrones.com/members/JSmith871<div><p></p><p>The first video link here has had a serious influence on me and my drive to push for advanced designs and concepts. This is <span id="eow-title" class="watch-title" dir="ltr" title="Raffaello D'Andrea: The astounding athletic power of quadcopters">Raffaello D'Andrea</span>, in a "Ted talks" video. )Note that the camera will repeatedly focus on Bill Gates in the audience) He shows the totally awesome possibilities of drones/multirotors, and I do mean "awesome" in its original meaning ! They do 'cheat' a little to do this - note the little white balls to help the video reference to make it all happen. That being said, this is amazing and even a little scary as to the potential...</p><p><a href="https://www.youtube.com/watch?v=w2itwFJCgFQ">https://www.youtube.com/watch?v=w2itwFJCgFQ</a></p><p>Here is another example of advanced design and concepts - it may seem to some to be kind of a gimmick, and may seem to others to be scary as to its potential use or purpose. A drone that can "Snatch" things:</p><p><a href="https://www.youtube.com/watch?v=ol8c9bdp7YI">https://www.youtube.com/watch?v=ol8c9bdp7YI</a></p><p>This is a similar concept that is more practical than scary, a drone that can perch on a branch:</p><p>I wonder why they designed it to perch the way it does, it looks like it would be off balance or need a lot of grip to be able to do this reliably:</p><p><a href="https://www.youtube.com/watch?v=L7WR8MamHus">https://www.youtube.com/watch?v=L7WR8MamHus</a></p><p>I was tempted to post videos about drones carrying firearms, only because is fits the description of being "scary", but no need, especially since DIY Drones has a policy against weaponized drones.</p><p>When I am able to search again, I will post more in the way of "Advanced to the point of scary".</p><p></p></div>Tilt Rotors, "Angle (quad, etc.)" or variable pitch motorshttps://diydrones.com/group/vanguard_paradigm/forum/tilt-rotors-angle-quad-etc-or-variable-pitch-motors2015-05-08T00:27:37.000Z2015-05-08T00:27:37.000ZJ Smithhttps://diydrones.com/members/JSmith871<div><p></p><p>Please forgive me for lacking expertise in forums, typing, etc. and for not yet finding the best way to post Youtube videos.</p><p>That said, here is one of the best developments in mutirotors IMNSHO:</p><p style="text-align:center;"><span class="font-size-4"><strong>Tilt Rotors !</strong></span></p><p>I like these because they are not TOO difficult, and have been implemented with much success by a few people. I think these should become all but a standard in multirotor craft. Here are examples:</p><p>Youtube: iQuad tilt rotor test / close-up example:</p><p><a href="https://www.youtube.com/watch?v=5HJ5QXE1sdM">https://www.youtube.com/watch?v=5HJ5QXE1sdM</a></p><p>Another iQuad tilt rotor, this one has a very nice frame, (and I am partial to using aluminum)</p><p><a href="https://www.youtube.com/watch?v=2f3XxHcwVE8">https://www.youtube.com/watch?v=2f3XxHcwVE8</a></p><p>Another 'Angle Quad', this one uses carbon fiber tubing:</p><p><a href="https://www.youtube.com/watch?v=ra7hrH7oOgE">https://www.youtube.com/watch?v=ra7hrH7oOgE</a></p><p>Here is an 'Angle Quad' / Tilt-Rotor in a good demo flight:</p><p><a href="https://www.youtube.com/watch?v=ulO8XGZaC90">https://www.youtube.com/watch?v=ulO8XGZaC90</a></p><p>This is a 'T-tilt' Tricopter:</p><p><a href="https://www.youtube.com/watch?v=kg-90tjYQBI">https://www.youtube.com/watch?v=kg-90tjYQBI</a></p><p>This is a cross breed between an RC plane and a multirotor as a VTOL:</p><p>(If this is the guy I think it is, he actually switches his remote from multirotor to plane configuration in-flight, which he says only tales about a second.)</p><p><a href="https://www.youtube.com/watch?v=kg-90tjYQBI">https://www.youtube.com/watch?v=kg-90tjYQBI</a></p><p>There are varying degrees of success with tilt-rotors, but mostly success. One distinct advantage is that a multirotor normally has to pitch to about 45 degrees for a balance between forward speed, and giving the craft enough lift. With Tilt Rotors, the motors can do a lot of the pitch, giving the craft more potential dedication to forward speed.</p><p>Tilt Rotors have also been used for more specialized uses, such as one guy wanted to have video where the craft can 'Pan' directly sideways without tilting (yaw?) and keeping a more lateral and flat flight path as he goes to one side.</p><p>Another facet to this is that he had to invent/improvise a third joystick to operate it, which may seem to add more work and difficulty to it, but also shows more of the guy's innovation and genius:</p><p><a href="https://www.youtube.com/watch?v=STviF5deNL0">https://www.youtube.com/watch?v=STviF5deNL0</a></p><p>This is a prime example of what I mean when I write about "advanced design and concepts", and taking things to the next level.</p></div>