Listening to you talk is like hearing the essence of all physics classes I've ever had through school, and later. It's just so relaxing not having to question what you say, and just nodd in acceptance every time you make a statement. So true.

As a designer and builder of commercial drones I was very impressed, as always, with you presentation. Considering your in depth analysis with everything you do I was a little let down right at the end when you opted for closed DJI flight control system. Are you aware of the Ardupilot project, currently being used by such big names as NASA and Boeing? This is a fully featured open source autopilot source involving software, firmware and hardware. Everything you do you are making open source with your detailed content which enhances us all. I just thought this would place your flight controller, the most critical component in any multi rotor, and the only thing that makes them controllable in the air, as open source as everything else you are doing. For your consideration. Keep up the great content.

5 жыл бұрын

Spot on.

@stefengullicksen314

3 жыл бұрын

Great points!

I found this yesterday after my dad sent me a link and for once there’s a KZread that shows everything we want to see and explains it in such a good way Loving your videos so much

OUTSTANDING VIDEO! You have clearly put a lot of analytical thought into this project! Well done, looking forward to the next video. Thank you!

This is one of my favorite videos thus far. All of the information and thorough explanations captivate me! Reading through the comment section is also a breath of fresh air. It's great to see people inspired with science and engineering.

Having studied some of these concepts in school, I have to say you have an amazing knack for technical communication. Much better than some of my professors. Great video.

Really like your channel, it's rich in technical nomenclature. Like the way your explanations go beyond just the objects themselves and into the material and technical sciences that make up their design. One day, please do a video on your aircraft construction experience regarding carbon fiber. Sounds fascinating. What do you think of weight reductions schemes such as using aluminum wiring and fasteners, Copper wire and steel bolts are so passe' Hollow shank 7075/ 2024 bolts would be the cats ass for these ships. Every oz carried aloft costs billions of electrons.

@TechIngredients

6 жыл бұрын

Thanks! The balance we are striving for is useful information without extrapolating from dogma. If the viewer comes away thinking "now I get it, it's not really complicated and I bet I could do something even better if I just tried..." Perfect. Your suggestion about the bolts is excellent. Explain the engineering principal of mechanical modulus, find an elegant way to drill out existing aluminum hardware, test the practical balance of strength vs lightness and that would be the kind of video we would do.

@weatherphobia

5 жыл бұрын

nomenclature? wtf iz that? he never mentioned it.

@ruburtoe1

4 жыл бұрын

@@weatherphobia lol, the irony. It's the lexicon used in a domain

Yes the world needs more of you...I genuinely thank you for these great videos you do and hope for much more to come

In my growing years there was on TV most Saturdays / Sundays a science show. It was I remember (Mr. Wizard) you pick up where he left off. Getting some of we older folks to think of what is out in the world. Thank you, Alan

@TechIngredients

4 жыл бұрын

Sure. The motivation is the same.

I'm in awe at the depth of your knowledge in all these videos.

holy moly the knowledge depth! thank you

Another quality video from TI. Thanks!

Wow. 20mins, I don't think I even blinked once. Fascinating stuff. You are a wealth of information and experience. Who are you? Do you have any other ways I can follow your projects?

Ok. I stumbled across your channel somehow... but now I'm hooked. Love your deep knowledge of all the engineering details. It's like you were born with an erector set in your hands and just kept building and creating for the rest of your life! ;-) Great Work!

Excellent explanations of some basic engineering concepts. Looking forward to seeing that thing fly!

Learned a lot, love the detailed explanations

Informed intelligent articulate and entertaining presentation, thank you!

draganfly is undoubtedly the best drone company! It is providing support in ukraine by supplying ukrainian people with medicines, insulin and much more. with this it is increasing its visibility and brand awareness. has an experienced team and unique technology, currently very underestimated based on its potential!

What an awesome explanation. I feel like I can start trying to build one myself now.

I've used my Phantom 4 Pro to erect a 90 foot vertical antenna. It's my best antenna on 160m.

Cant wait for the next video - this is exactly what we need for a delivery system, thanks

Have you looked into the arducopter platform? I think it is a more mature flight system than what DJI has. Especially with the new Pixhawk 4.

That message is angling the rotors slightly off of vertical also prevents a condition during rapid descent known as Vortex ring State. This is a dangerous condition which can cause the aircraft crash.

"Dihedral looks sexier & I like that too " says the polymath genius :) Earned a favorite video spot on my list! Cheers buddy!

thank you

very nice construction, modular thoughts, very nice design, exactly as I would have wanted it !

I love your videos - I am a retired aero engineer with lot's of aircraft and drone experience. I wish I had the ability to explain things the way you do. Your explanations of things do require some engineering and mechanical skills on the part of the listener which cannot be avoided without making it TOO simplified. When I watch your presentations I can follow the technical flow of what you are telling me usually on the first pass no matter how complicated the subject. Keep up the great videos....

@navinsingh1730

2 жыл бұрын

I have a question, how do you make the least amount of supersonic drag?

Thank you for sharing all this knowledge.

I had to look up what an ESC is (Electronic Speed Control), just in case anyone else had the same question. all good wishes.

I can't even imagine how you can have so much passion, patience, knowledge and determination to implement such complex projects from A to Z. All your videos are amazing

@TechIngredients

9 ай бұрын

Wow, thank you!

Excellent video. Thank you! It's worth trying other firmware on your ESCs, if only to disable ESC braking which is great on a racer, but wastes energy and buys nothing on a heavy, yet is a default behavior on a lot of ESCs.

the best description of dihedral yet!.. thanks

@TechIngredients

6 жыл бұрын

Thanks. Have you taken a look at some of our other videos?

@TheoSmith249

6 жыл бұрын

I will be, your edification rate sync's nicely with my receptors.

Your Videos really help me to design my own stuff!

@TechIngredients

4 жыл бұрын

Great!

I'm so entertained by his videos,such good education and knowledge explained in a understandable way

Another good show!

Amazing! Thank you so much for your videos

@TechIngredients

6 жыл бұрын

Thank you for watching and for your support.

Very intelligent explanations on the reasons for the choices made. Wow

You are so good at explaining everything. I do wish you'd been my teacher - or dad!

@charadremur333

4 жыл бұрын

Ask for adoption?

Great video! Thank you

Did you ever come around to doing the setup video for this drone? I'm really curious to see the build progress.

For anyone wondering, ESC= Electronic speed controller, and is required to drive brushless motors.

Great video again. Thanks Great Topic

Why are these types of videos not the most popular on You tube. I love watching your videos. I learn a lot. Learning and passing on what we learn has to be one of the most important aspects of human life. Thank you. What did you do for a career?

Great information!

every time I am surprised by how much I learn thanks a lot man you have a great brain

In the oversized bolt discussion at 11:00, you might consider on future projects to bond an aluminum cylinder through the hollow spar for the bolt to ride in. I think this would be stronger enough that you could use a smaller bolt to achieve the same weight as before, but much stronger than the current arrangement. Excellent videos, good details as to the choices made. I learn something new every time...

@TechIngredients

4 жыл бұрын

Thanks! You're suggestion might be a little lighter, but it probably won't be stronger. The spar can't accommodate a larger diameter aluminum tube, bolt etc.

YOU'RE A GENIUS!!!

@TechIngredients

2 жыл бұрын

I keep saying that! My family just rolls their eyes.😕

Do you have a website with more of the technical specs and parts?

Thanks

LEARNED ALOT! and i have basically given up on trying to build a quad-copter! i was going to use 12 double same motors as your but if that fails with double props its pointless. unless again you can build a bigger motor! but again their is the cost of the prop!

This guy is a legend!!

That is a huge drone!

How nice of you. Thank for great video.

I just learned a shitload! Nice job man!

@TechIngredients

5 жыл бұрын

Thanks!

keep thinking im watching Cody from the future :D

Great drone!

Nice to have these followups :-)

Awesome thanks

I am really curious what this guy was doing before he started making educational youtube videos / he sounds like a physics professor crossed with a gifted mechanic & machinist with a spirited teacher talent & gifting & very articulate & intelligent! I would be honored to meet him in first person!

He does love this things obviosly!

About the manufacture of composite parts...The industrial process of manufacturing light epoxy resin parts is usally done with PrePreg (i.e. rovings or mats of fibre preimpregnated with epoxy resin). It can be kept cooled (under -18°C) for up to two years, or at room temperature for a few days, before it cures. To assemble a part, you stack the layers over a mandrel or inside a mold, depending on required dimension, and then reduce the amount of resin and cure it. This happens,as you mentioned, in an autoclave where heat and vacuum can be applied onto the part. As the resin cures under heat, it liquifies and the unneccesary resin is sucked from the part. That resin is catched up by layers of fabric wrapped around it,over a permeable teflon mat you just can peel off later. Not really feasible for a single build,but if you need a custom shape and more than once, maybe it can be useful to be able to do it. Also, on the point of carbon fibre failing under load - I know that when you would manufacture a custom part that you expect to experience a lot of stress, you would incorporate a layer of kevlar, which prevents the whole structure from failing just because individual strands of carbon broke.

@TechIngredients

4 жыл бұрын

You're point about kevlar is true. Sometimes it is misunderstood that blending the kevlar and the carbon produce a superior composite other than Kevlar's ability to stabilize fragments.

Hi i'm a composites technician and your explaination are very good and very interesting project.

Excellent design and build. Making the top and bottom plates of unequal thickness was a good call. It's a great drone! You might be able to save a little weight for free by using larger radii for the tube brackets, but you may have to be a but more careful with it while it is folded. Seeing that you have carbon sheet goods, perhaps you could make some carbon washers for many of the places, where galling might not be an issue. Stover (ovalized) might be lighter than the Nylock nuts, though would only be appropriate for the fasteners which remain fastened. Bicyclists and motorcyclists have made titanium fasteners more common, but they lack in toughness compared to steel. [If you ever do make another you might use Grade 8/ Class 12.9 fasteners of smaller diameter.] Because the props are close to the tube it might be a bit more efficient to use a symmetrical airfoil near the motor, with the trailing edge facing down. If the props were higher from the tubes it would lessen the difference, but spacers would cost weight. If the motor drivers get hot, could they be moved under the props? Good videos. Thanks.

@TechIngredients

6 жыл бұрын

Boy, you have a lot of interesting ideas. Some we have considered, but many we have not. Larger radii? Do you mean larger outboard positioning of the aluminum folding brackets, larger spacing of the pivot screws or larger tube diameters. There are trade offs for each of these decisions, but maybe you meant something else. For the larger and many of the smaller Nylocks we have converted to aluminum. This was an EASY improvement...many are not. Strength is rarely an issue with fasteners for these craft, but point loading is. Load distribution with the lightest fasteners that are practical is often preferable. Titanium is not likely to be an advantage unless we wanted to sell this project and we needed to make the brochure sexier. The large rotors we built in subsequent videos were much easier to construct with a flat lower surface. A different construction method might allow this degree of freedom. Why would airfoil symmetry vs say AOA be useful near the motors?

@BrendaEM

6 жыл бұрын

Well, sometimes the obvious eludes the genius? I should think that the point of diminishing returns is not far off from your design, but are a few grams here and there that might be saved, which add up, and add up to a few more seconds of flight--or a slower decent on a hard landing. I meant a larger radius on the metal bracket, which holds long carbon spars/struts (which hold the motors.) Sometimes, when I draw up things, I ask myself: what has the right and justification to be here. I haven’t seen aluminum Nylocks. Interesting, thanks. Yes, I should think that point-loading / stress concentration is difficult because-not only because carbon fiber a little brittle, but it is so stiff elsewhere which yields little. I’ve worked with fiberglass a fair bit, but that’s much more forgiving. I thought that the spars/struts could be given a symmetrical airfoil shape to let the air pass around, to minimize the stagnation around the sides of the tube. Merging in with your box attachment idea, I drew up this quickie Rhino3D drawing. I’ve tried to keep the faired airfoil shape constant to the edge of the prop. www.dropbox.com/s/advi8vwf804woqw/Quad%20End.jpg?dl=0 Cheers P.S. Some free stuff: openfoam.org www.salome-platform.org/ code-aster-windows.com/ www.code-saturne.org/cms/ www.paraview.org/

@TechIngredients

6 жыл бұрын

Remember the old adage, "A good tool is one you can't add anything to and a great tool is one you can't take anything from". I appreciate your approach. You might find it interesting to take a look at the history of the development of the early Lotus automotive racing team. They carried this philosophy literally to destruction! Nice CAD. Now, I understand your comment about the arms, interesting, but remember the greatest impact will be where the rotor-wash velocity is greatest. Also, keep in mind that the arms have to resist torsional forces to prevent the discs from oscillating when maneuvering. They will need an increased cord length to compensate for the narrower profile. Still don't understand about the brackets. They are more massive than the arms and the central plate is heavier than both.

@myselfremade

6 жыл бұрын

Interesting conversation you guys have been having! On the topic of the fasteners and the stiffness of Carbonfiber: I would estimate you could go down 1-2 sizes of fastener where your booms are attached if you cut a solid block of nylon or maybe balsa to fit inside the tube, with holes drilled through it for the fasteners. That would allow you to clamp down hard without any worries, and it would spread the radial load from the bolt along the whole cross-sectional area of the tube as well Beautiful bird! Almost twice the size of mine

IMHO: Your FANTASTIC VIDEOS ARE AWESOME, INFORMATIVE, and BETTER THAN ANYONE ELSE'S!!!! WOW!!!!! VERY INTERESTING, and INFORMATIVE!!!! YOU'RE LIVING THE DREAM!!!

Those are some serious motors

I love everything about this guy.

@TechIngredients

5 жыл бұрын

Thanks!

Glad I've finally found your vids! Not all that familiar with multi-rotor copters but it took me several minutes to figure out what you are calling "rotors" were actually what I call propellers. In my ignorance, a "multi-rotor" drone is simply one that has 2 or more arms, each with some kind of thrust device. That "device" currently seems to be a propeller with one or more "blades". I will have to be careful in reading about "multiple rotors" having nothing do with the number of blades on the props! ;+) Perhaps this is the standard terminology for these kinds of 'flying devices. Look forward to seeing more of your exercises/experiments!

Drone On ! I am ready to take flight !

very good! good luck !

G’day again mate. Have you considered doing a vid on hoist winches for heavy lift drones? There is a major gulf in the available range right where UAV’s sit. I can’t find a suitable unit anywhere. The units for the Bait Boats camera cable are the closest I can find but the manufacture is unwilling to sell unless it’s part of one of their steeply priced packages. Cheers and thanks again for sharing your knowledge with everyone.

they could be used for spraying if combined infrared to see the problem spots in the crops and stop problems before they start you could even control pollination which if timed perfectly you could increase per acre production. the next big thing is the collection and sale of pollen.

Really good video! There are two points that occur to me (and you may have looked at and discounted them) 1. Carbon conducts electricity! Why not use it as a return path for your motors / batteries reducing the wiring needed! 2. The propellers you have seem to be almost uniform in depth of materiel. This would simply have the effect of pushing the air in one direction. If you look at the cross section of any lifting body (plane propeller, wing, windfarm blade etc) you see there is a more complex form where the lift is generated by the paths of air above and below having different lengths causing a partial vacuum being formed at certain speeds! This lift is actually greater than the force of the air being pushed downwards! As I have said they may have already been discounted for good reason!

@keantoken6433

5 жыл бұрын

Carbon is conductive, but not very much. That means it is very efficient at turning electricity into heat. The energy lost would almost certainly be more than the weight savings of some wire.

Great video and you are my idol :-) there is however one thing I disagree with in your design. I would not charge the batteries on board. About a year ago, I had a battery fire for no apparent reason. There was no damage to the area around the battery since I had it in a fireproof bag, but with your design if you were to have a fire, it would take out part of your creation. Other than that I love everything about your drone. You just got another subscriber.

@denniskatinas

5 жыл бұрын

On drone charging is the future. Roll with it.

@freejulianassange3143

5 жыл бұрын

Yeah, drop and roll.

Main parts: 9225-160KV Turnigy Multistar Brushless Multi-Rotor Motor Dynam 30x5.5 Carbon Fiber Propellers for Multirotors (I guess) Hobbywing Platinum Pro 50A V3 ESC Carbon Fibre Square Tube 20 x 20mm (I guess) 4S Batteries

I am really impressed at your work! Could you please put links to the companies from which you bought rotos and other stuff? Thanks in advanmce

Great video. Really enjoyed the deep dive, Well done:)

@TechIngredients

4 жыл бұрын

Thanks!

I really like how technical you get, I imagine you are probably an engineer by profession just based on your detail and nerdy-ness lol (sure you might not be, but if you arent you should be). Much appreciate it as an engineering student myself who likes to know specifics of design.

@TechIngredients

5 жыл бұрын

Thanks!

You are just about the best science teacher I have ever seen, and I had 24 years of education before I was through, although I ended up with degrees in "political science" (which isn't a science at all) and law. Please tell me that you don't merely make KZread Videos. You do teach at some college, right? You have a talent that, unfortunately, is far too rare in my profession as a lawyer, which is that you explain complex concepts in plain English without wasting a lot of time or words.

@TechIngredients

3 жыл бұрын

Thanks! I assume the viewer genuinely wants to understand and is able to understand. All I have to do is link principles to what is already known.

I agree.. this guy for president.. hell world leader for all I care. An overload of skills.. its stunning

You can have a propeller with "1" blade and you can make the square tube aerodynamic better with very light foam-material.

very educational... Thanks

Very interesting video! May I ask how much dihedral did you build in?

Request: please add web links to the products that you pick or web sites that you find useful. Some people put this in the description but I gather that that has problems and so other sites put the information in a comment and then "pin" the comment so it stays on top. I just discovered this channel a week or so ago and I'm poking around going through the various topics. Excellent work. I hope you are still making videos.

@TechIngredients

3 жыл бұрын

Thanks for the suggestion. We're working on several new ones right now.

You are a legend

I'm just starting the drone/propeller videos. Did you happen to see Mark Rober's drone video from 3/18/23? The drones in this video have a unique, asymmetric prop design to reduce noise substantially. He explains it about 15.5 minutes into the video. I'm looking forward to watching the rest of your drone video series!

@TechIngredients

Жыл бұрын

I didn't. I'll check it out.

Very impressive! Can't seem to find your previous video. I suppose one could lay up these sheets of carbon fiber with the same as "mat, roving, mat" etc. like in fiberglass hand layups and make some fine shells to make this unit look like some sort of Alien Spacecraft and just scare people into thinking 'contact' has been made. Sure would like to know how much you spent so far...

This is a compliment, I think you can make an autoclave // or buy a used one to fix & upgrade it // given that you can design & make controllers & are familiar with vacuum pumps & vacuum bagging / & metal fab / you could probably make a propane heated, nitrogen purged, steel tube with hydraulic door & oilless compressor // DIY orbital welding & DIY NDT camera for testing analysis for safety to make sure its welded without defects so it does not turn into a pipe bomb when operating // You can buy the larger steel ring sections prefab & have then sent on a flatbed/ Premake the foundation & then mount it & finish it, then cover with a shed or steel building /// the heat from the autoclave will warm the building // then you can DIY some dope custom carbon fiber stuff //

looks great! I wish we could have seen it laid out as in flight configuration. those booms look really long compared to the size of the props, but i'm guessing that's because it's an 8 rotor system. and you need more clearance between props on the sides than you do in the middle

@TechIngredients

5 жыл бұрын

Our short, flight demo video shows our 6 rotor model unfolded. Its even larger than this one. In both cases, the booms are overly long to allow larger props to be installed.

@engineer9528

5 жыл бұрын

I am curious of HOW big you will go. I still have one question unclear: Is it true that the most efficient propellers for heavy lift drone in terms of( thrust)/(consumed power) are those with largest diameter that can be physically fit in a given dimensions of drone? We know that any drone has its external dimensions that are not limitless out of many reasons. If, for example, you have an X4 mixer configuration drone that shapes a square - what would be more efficient - having 4 rotors that physically fits into that square or 8/12/16... rotors controlled in the same X4 config but in 4 groups of n rotors each that also fill that square?

Great content 👍

If you look at gain distribution tubes used at grain elevators (farms), you will see wires (under tension) on four sides of the tubes keeping them straight. This may be a good way to further reduce the weight of the rotor arms and still keep the rigidity needed for the rotors.

@TechIngredients

2 жыл бұрын

Typically those elevators are constructed from concrete segments and concrete has good compressive strength, but very poor tensile strength. This is the principle that underlies pre stressed concrete engineering. Carbon fiber has balanced compressive and tensile strength and the value of additional stringers would be low.

@williamhinelsey9742

2 жыл бұрын

​@@TechIngredients I was referring to the grain tubes that feed the grain from the leg, to the top of the silos. Without the tension wires, they would fold under their own weight.

The arms on this drone look exactly the same length diameter and material as a modern day carbon fiber hockey stick! Using the hockey stick tech, you might be able to get these even lighter.

So I have a question, what is your background? Very interesting videos and multi subject as well just curious how you amassed so much knowledge

Good video. I'm wondering if there would be an advantage to horizontally offsetting the rotors or simply adding four more rotors in an inner circle on the same struts. If you could control 12 rotors at once, it seems like you could fit the additional four on the same horizontal plane, just closer to the center.

@TechIngredients

Жыл бұрын

Maybe, but the additional lift would be significantly less due to the diameter of the inner rotors.

I shared this on Facebook!!!

Hello my name is Justin Wilkes better known in the drone community as Swoop I am a freestyle pilot and Ariel videographer as well as Rc aircraft designer and engineer and from the perspective of someone who has been in the RC community for 20 years you are doing some really good work I really like the direction you are taking your research what grows the technology that advances us farther are people that are not afraid to experiment in the unknown keep up the good work.

@TechIngredients

5 жыл бұрын

Thank you, that means a lot!

Hey thanks for producing yet another very informative video. At about 16:45 in, you start discussing the motor efficiency and I didn't completely understand the headroom statement. Rather than ask a lot of stupid questions, I'm going to read up on ESC's, and motor torque curves and look forward to seeing you talk more about this in the future. Thanks.

@TechIngredients

7 жыл бұрын

Headroom,was a figure of speech to indicate that the motor is operating with a voltage drop of approximately 70% of the battery supply voltage. If we were using 8s batteries, the motor would be operating at approximately 35% of the supply voltage.

@0MoTheG

2 жыл бұрын

17:20 it is a matter of duty-cycle. At low demand there will be low duty cycle and that causes high switching loss. There isn't actually a voltage drop but for the moment of switching.

If you look at the 787 composite wings they deflect massively when loading for lift, could you do something like this with the drone arms to achieve to prop inward pitching, that would look awesome plus would probably be really light? Maybe make spars with your balsa carbon fibre methodology?

@TechIngredients

4 жыл бұрын

It's not that difficult. Keep in mind that destructive oscillations can occur both from mechanical and the control, feedback loop if the arms become too springy.

Holy crap, this channel is neat.

About making carbon fiber; wouldnt baking acrylonitrile release large volumes of stinky gas, and is it somehow collected? Seems like a very good thing to have. I recall being able to use it for a resistor or low current conductor.

This is what my company does, but we can't do much right now because of the FAA. You'll find that they become more economical with Lithium-Ion over Lithium Polymer but you need to be able to design the craft to be *extremely* light. Additionally if you are shooting for efficiency multirotors are very case specific, as you noted, aka fixed wing aircraft still rule.

@TeganBurns

7 жыл бұрын

And just to clarify when I say more economical I mean instead of 20 min flights you'll be seeing more like 1hr and 20 min flights.

@TechIngredients

7 жыл бұрын

The FAA limits range to height above ground and line of sight. Depending on the observer's position, line of sight can be extraordinarily far. The moon is line of sight. Both Lithium Polymer and Lithium Ion will provide more energy capacity if the current flow is low. With sufficient battery capacity and low power use (1C) endurance is increased. However, as you have said,we use Lithium ion because it's energy density is higher. We are also investigating hybrid power sources to significantly extend endurance and we will present videos on this project too, as it proceeds. Thanks.

@tonymcintosh91

Жыл бұрын

What's your company called?