Airplane Design Is Brilliant

[@Wintergatan]

I forgot to mention this in my latest video about the new programming wheel design, so i wanted to point this aspect out! Making another video tomorrow about the gear train and the speeds of the programming wheel. Kids remember to make your structural parts functional ok?

[@bloxycola8272]

Ok!

[@Kucharskov]

You forgot to build whole marble machine -.-

[@mlsh-azerty]

you validate a untested part , hmm and were is the requirment , "can change the entire music in acceptable time for a concert"

[@blackest3314]

@@mlsh-azerty I just commented about it, as bulky and complex the MMX wheel was, he could switch the panels pretty easily. This one doesn't have a similar feature, therefore he's going either to change the pins on the fly (which could take forever and with the pressure of being live) or change the whole wheel. Which doesn't seem to be possible at the moment.

[@nolan412]

And to make them launch dozens of model airplanes to drop marbles across the room.

[@nagualdesign]

Looking at the structure of the programming wheel and the way the horizontal slats are connected to the wheels by a single screw at each end, along with the spaces in between the slats, I think there's going to be a tendency for skewing, like a parallelogram. The extra braces are also placed perpendicular to the slats, so they're not going to resist skewing very much. I would suggest that you use diagonal braces instead.

[@TroelsDenLux]

Was about to write the same. Add an extra ‘wheel’ (or two) to the shaft could be a solution.

[@nagualdesign]

@@TroelsDenLux An extra hub wheel or two would certainly help to stop the pin slats from flexing, so they're probably essential, but they won't help much with the twisting because everything is fixed at right angles.

[@jeanpenus]

Came here to say the same thing. In the current state, the two ends can twist in opposite directions relative to each other like two hula-hoops connected by strings. Both your suggestions of diagonal braces or an extra set of wheels as TroelsDenLux would help rectify the issue.

[@garci66]

The slats are actually connected. (only 6 sheets or so of slats cover the wheel). They have "tabs" that are not cut all the way through between the slats so that gives it a lot more rigidity. I was thinking the same as you guys but then he mentioned the tabs only in passing

[@yvan2563]

Wouldn't it be simpler to have geared wheels on both sides?

[@MartinMeise]

As a mechanical engineer, I would add diagonal reinforcement around the circumference to better transfer torsional forces from the gears to the programming pins. Could be a plate or diagonal wires. At the moment it looks like the bars for the programming pins are connected with one screw only to the gear wheel. One screw is not good at transfering torsonal forces.

[@josiahwilson9351]

Fellow mech here. That's a good catch but he pointed out in the last video that the outer "slats" that form the outside of the wheel are actually all one delrin piece that's connected together with little tabs between the slats that are thin enough to bend but still transmit a lot of shear. It'll be mad stiff with that , plus the hole spacings will be super accurate since it's all done in one mill operation!

[@tronique5736]

The bars are not actually bars, but four plates with lots of cutouts. So it's a lot more than 1 screw per side. This wheel design should be very rigid.

[@TheCebulon]

I wanted to point out the same.

[@johnrehwinkel7241]

Also, I think it's driven by the edge, not via the axle

[@lukemartin9209]

I was looking at the slender slats wondering if the unsupported length between the two ends would allow them to deflect too much under load. I see there are some internal braces that tie 3-4 slats together, but thought it might require something more significant.

[@Berkana]

Functional structures are tricky to think about, because sometimes mixing function into structure is good, but sometimes it makes maintenance impossible or risky, or it makes certain adjustments impossible or compromises the structure or the function. It is still to be determined on a case-by-case basis, and cannot be called a universal best-practice. I would qualify the decision making by adding that any part that experiences wear or fatigue or is at risk of being damaged over the lifetime of the machine or needs to be calibrated or adjusted should be made replaceable and should not be integrated into a structural part. For example, imagine if your brake disks were integrated into your wheel. That would reduce the part count, but then replacing the brake rotor would entail replacing the whole wheel. Imagine if your kitchen cabinets were load bearing. You would never be able to remodel your kitchen. That's the sort of thing that ought to be looked out for when integrating parts to reduce the part count and to simplify the construction. In the case of the example of battery packs that are also structural, the concern I have about that is that swapping out the battery can become a major ordeal if the same battery pack cannot be removed without compromising the structure or perhaps taking apart the entire structure. Certain connections, which could formerly be done as super secure welds end up being compromised and need to be done as detachable connections which might not be as strong.

[@creageous]

Yeah, I hear that changing the batteries in a tesla cost about as much (or more) than a new tesla.

[@Sonny_McMacsson]

@@creageous Yes, Teslas are the one-time disposable K-cups of cars. Eco for sure.

[@j_sum1]

In an accident you want rescuers to be able to use the jaws of life without perforating any batteries. Structural batteries are potentually very hazardous.

[@TheNitram8]

Great information, it's so hard to find actual criticism of overly hyped technology. Structural batteries indeed seem to have a lot of downsides.

[@Tremoneck]

@Danny Kaae every single electric car is doing that. It's called recuperating and extends the range for stop and go traffic significantly. The brakes are for emergencies, that's why they are still used in them. They even have the problem of them corroding faster because they aren't used. So the car sometimes uses them to extend their lifetime.

[@varkboys9999]

I'm glad to see that Martin is still making jokes and enjoying himself!

[@j_sum1]

Planetary gears, fish stair, visible marble train, wood grain - these are all things we loved for their aesthetics even if they are not the best engineering. I really hope they do not all disappear. I am not convinced the millisecond music tightness is worth losing the visual spectacle that made the first two iterations of the marble machine so inspiring and amazing. [Edit] I should add that I also loved the mechanical sounds of the original machine. It added something very real and organic - in the same way that a guitarist's fingers sliding over wound strings adds to the authenticity of the sound. I loved the marble machine and Wintergaten from the first time I heard them. There is so much more than just engineering - including the music box, modulin and the bassist's haunting whistle as well as great melodic composition. I can't help feeling that we have lost more than we are gaining in this pursuit of precision.

[@aster8537]

I don't think Martin ever really got that the thing people loved about the original machine was how much it looked like some junk a madman put together in his garage, turning it into a precision machine takes away that magic entirely.

[@Deses]

Hard agree. There are computer programs to do tight music, a marble machine doesn't need to have the most absolutely perfect timing.

[@DavidSartor0]

I disagree.

[@aster8537]

@@DavidSartor0 stunning counter argument!

[@DavidSartor0]

@@aster8537 Haha.

[@these.are.my.things]

Every design decision is a trade-off. Fuel in the wings will decrease the aircraft's ability to roll. It will also create trim issues if they don't feed at the same rate. The feed issues is normally resolved using aileron trim and fuel selector switch(more complexity). The roll issues has to be factored into a good design as it is away a compromise, there is no free lunch! Love the video. Keep up the good work.

[@these.are.my.things]

@@SpeedyGwen True but lots still have wing tanks because fast aircraft are often small relative to there fuel needs. So they put some fuel in the wings even if they are thin. look at an F14 even in the swing wing they had tanks. They are quite small and narrow wings. What I'm getting at is even though it seems like a silver bullet using things as dual purpose it may not be depending on the outcome you are looking for overall. 😁

[@RoamingAdhocrat]

The number of crashes caused by the pilot incorrectly switching fuel tanks - trying to draw fuel from the empty tank…

[@Deses]

Martin was speaking as if functional structural parts were perfect and had no drawbacks. 😅

[@these.are.my.things]

@Deses Pretty much. I don't blame him. In some situations the drawbacks are minimal. If he's primary goal is to simplify then maybe it's worth it. But maybe when he gets to a point where he needs to make modifications it might mean changing more because the parts now is dual function. I'm confident he will make it work.

[@Mark_LaCroix]

Martin's view is that if you find the right solution, there is no trade-off. And that's what he'll never be happy with the MM, because he'll never stop treating those trade-offs as fundamental flaws.

[@ericmadsen8324]

Just making a note; the cross-ribs that are being used to program can deflect a lot toward the center from gravity, and any other forces on them. That might lead to timing issues. I noted there's some curved pieces attached to the cross-ribs from the inside. Might want to stagger those around the drum to ensure there's no cross-ribs that just support themselves. Can help with rigidity. No extra parts, just a bit of reorienting.

[@ardanzaasier]

In the new design, I am concerned that the structure will not be sufficient. For example, one side might rotate more than the other because it is supporting some large torque force, as it would bend the whole structure around the main axis and the musical accuracy would be affected.

[@verdiss7487]

An issue that this design philosophy runs into is when the structural behavior of a fructural part (bearing weight) is at odds with its functional behavior. With the MM3 wheel, this might manifest as the structural forces being transmitted through the programming slats causing them to bend or bow, interfering with the music timing. This could not be an issue if the slats did not carry significant structural forces.

[@Internet-Antics]

I agree with most of this, but Tesla's approach to structural battery packs in the frame is fine if you forget lifetimes of batteries. You can't replace or service them, and that can be a big issue. The MM3 doesn't have that problem -- so run with it -- but there can be reasons to go for modular over integrated solutions.

[@ThompYT]

You actually can replace the entire pack. It's listed in their service docs

[@kaasmeester5903]

Tesla figured out the lifetime of batteries a long time ago. Easily 500k miles... on average. And if a particular battery needs to be replaced earlier than that, you can still replace it just fine, with a little effort. That works out fine for the outliers, though it will suck if they have a recall.

[@JaidenDotB]

@@ThompYT One thing to consider though is the price and complexity of this service, since instead of just popping the hood and lifting out the battery, you'd have to seemingly have to take apart a large part of the vehicle. Plus it'll be pretty much impossible for anyone who isn't Tesla to service this because the likelihood of OEM or aftermarket parts being available is basically zero

[@ThompYT]

@@JaidenDotB there's no EV where you can just pop the hood and replace the battery... It would be a horrid idea and probably an impossible one too.

[@billkeithchannel]

Musk is a fraud and not the best example to follow.

[@ivonakis]

Manufacturing is a big part. Having 100 simple parts you can make is still better than 3 that are impossible to manufacture / assemble, or just too expensive. The new designs only confirm that you are improving in both design and manufacture.

[@Mark_LaCroix]

This only makes sense if he was trying to mass-produce the MM3 as a consumer product.

[@Goual]

I am very glad you're back on KZbin. I've been following you for years, I have a good idea of what you've been through (at least in your "public" life, let's not look like some kind of stalker) and I appreciate that you keeping up is a great achievement by itself. Congrats man

[@MrLarsson92]

Reminds me of the first principle design mindset used when designing f.ex. the Cyber Truck. There they, similarly to the airplane, redesigned already existing parts of the truck to have the strength to eliminate the parts which were only there to carry weight/provide strength.

[@milkwater1204]

I'm so happy you've felt this second wind and I'm excited to see what you do.

[@creageous]

And a whole new style of video presentation, too.

[@moustholmes]

hey Martin I just wanted to share another good design tip: when designing something reallize that something is not going to work as intended even though you tested everything independently. So make sure that in your quest for a perfect machine you dont get in to the situation where you dont have space/ the option to replace a part with a new design.

[@Kant0sh]

You are doing so well, dividing all the problems into manageable chunks. Keep going, and keep learning 🤗

[@levilukeskytrekker]

+.

[@k-mac9798]

If you find the slats bend too much in the middle you can add strength without changing the design. You can make the cross section of each slat loot like a T with the flat section as shown in this video. This will give it depth in bending and thus strength.

[@iomeliora9430]

I think any creative work can become magical once you are in the flow, and you make something that has never been done before. As a visual artist, I made big efforts into developping my own technique, my own style, my own imagery. This gives me the feeling to have visited a parallel dimension with just enough time to take a picture.

[@savage9264]

I feel like your drum will need another spoke wheel in the middle to prevent warping/collapse in the center

[@koyrehme4361]

Word of caution: you tried to combine the gears with the marble lift on your second machine and it was a constant source of headaches. The core principal you're presenting here is important, but make sure the combination creates synergy before commiting to it.

[@dudenamedchris3325]

As an RC pilot I couldn't be more excited about this video, especially from someone like you!

[@roderickrayrutledge2740]

This new lipo battery and brushless motor technology is facinating me.

[@Real28]

@@roderickrayrutledge2740 absolute game changer for RC airplanes.

[@GoodEnoughVenson_sigueacristo]

I am really happy that you're still doing this. There is no way that I could work on one project for so long, but I love it! Like my favorite anime that began when I was a kid and is still going strong, your work has been a stable constant in my crazy life. Thank you!

[@pizzatheface]

I love it when you make yourself chuckle, Martin! It's very endearing!

[@jacob.munkhammar]

This is the beauty of engineering! Given that you made the marble gates accurate down to the millisecond, you will need an extremely rigid programming drum to match that. Are you sure the drum will not flex at all - torsionally or radially? I myself wouldn’t dare betting on it without prototyping.

[@Federico-1]

Maybe my favorite aspect of this channel is that martin presents a highly scrutinized pitch for his ideas as if we have the knowledge to call him out if he’s wrong. I feel like i’m being given credit for being smarter than i am and it feels nice lol. I remember my middle school band teacher showing the class the marble machine and falling in love

[@jeremymercer5655]

I wanted to highlight something about the airplane example that you hinted at slightly and your paper airplane example demonstrated very well. In the airplane example, the most significant benefit for moving the fuel to the wings is that it moves the weight of the plane to the location of the lift. Not only are you reducing weight by combining functional parts with structural parts, but you are reducing the load that the structure of the wing has to hold. Your paper airplane had all the weight in the middle so the wings had to hold up the fuselage and the fuel. But when you moved the fuel onto the wings, you were holding the plane up with the fuel tanks. Then the structure in the wings did not have to hold the fuel up at all as the lift was already doing that.

[@SkyhawkSteve]

a side benefit to putting the fuel in the wings is that the CG didn't move as the fuel was consumed. Very handy!

[@phillipsiebold8351]

The biggest barrier to doing this earlier was you had to develop cantilevers that were strong enough to hold the tanks, and having engines strong enough to create the lift that was necessary for these heavy wings.

[@CPS747-8]

I never thought I'd see Wintergatan talk about my favorite thing and my field of study!

[@panzermagier]

Same though 😃

[@roderickrayrutledge2740]

Flight.🙏♥️

[@levilukeskytrekker]

+.

[@panzermagier]

@@roderickrayrutledge2740 aviation is my first love

[@StoicAtol21445]

great video. loved it. been out for 40 seconds and I already watched it all.

[@benaspetkevicius7139]

Happy 40 birthday Martin! We love you, your music, your creations! Have a beautiful birthday!

[@RolfWilliamWik]

Takk!

[@thomasbecker9676]

Aerospace engineer here, and I think you make be overthinking things.

[@jamessaunders5112]

Martin, I'm glad you find joy in the learning process and seeing your designs improve. As you continue to move forward don't forget that your previous designs also served their purposes and met the criteria at the time. Learning is a double edged sword, on the one side you see the joy in innovation and the new views you have on things. On the other side you see your previous knowledge and experiences in your new enlightened mindset. At this point you can view those previous experiences negatively and cast them aside or beat your previous self up. Or you can view them as stepping stones that helped you get to where you are at now. I'm glad you view them in the latter sense. Keep up the great work! Edit: I'm glad you think engineering is a close 2nd, as a Civil Engineer, I think it might be a really close 2nd but I don't rock out to plan sheets and designs as much as I do to music. 😀

[@dann3dann3]

The new programming wheel and pins seems much simpler and less prone to cause issues. My main concern is that there will be considerable fewer pins in one turn, so you will have to crank the wheel faster and get a shorter musical loop. One workaround could be to have several ”note grooves” per pin, e.g. a full bar of music. You would need to make many types of pins, for each type of bar you would have in the song.

[@celeron55]

I agree with some previous commenters - the programming wheel needs a thick tube in the middle, which can double as the axle with bearings at the ends, and which can trivially support the middle portion of the wheel and any other supports that are needed can also be mounted to it inside the wheel.

[@andrewh8439]

Good ideas, but remember making structural components functional is great, as long as you aren't compromising the structure. Taking your airplane wing example, look at the cross section of the wing internals and the amount of structural components still inside. I would be looking at the forces the wheel experiences as well -ie. torsional forces that cause the 2 wheels to be out of alignment and the slats to skew (as others have mentioned), and deflection at the midway of the programming wheel slats. The weight of the slats or even the forces of the programming pins acting could deflect the slats and pull the ends of the wheel inwards. This may cause some issues with the programming pins functioning correctly.

[@dean3184]

I really miss your long live streams. I had them on another monitor as I work and it was sooo great watching your design process. Pretty sure i'm not alone in this

[@kingkurtis]

I know I suggested this on your last video but as I didn't get any responses from the community I thought it's worth suggesting once more. The form of the giant wheel feels like the last piece you are keeping for its aesthetic value and if you were to work with something similar to tank treads you could greatly reduce the form factor of your design which would allow you to have a lot more pre-programmed songs with you when you tour which would remove a lot of unnecessary fiddling.

[@Mainyehc]

The only problem with moving to such a solution is that Martin’s newfangled variable size programming modules couldn’t properly make the transition between the flat and the curved portions of the track (not without vibrating and making a lot of noise, that is)… He’s no longer using programming pins, in case you didn’t see, and the only way he could move to such a tank tread-like system while retaining the ability to program for different time subdivisions would be to move back to programming pins and an impractical number of treads, at which point he’d be better served with a flexible membrane, not unlike those found on running treadmills…

[@kingkurtis]

@@Mainyehc Yeah thinking about it the that is potentially a big problem with this idea, you definitely can have flat panels that you stick things onto on a tread/conveyor system but I hadn't thought about how much noise it'd make. Would also mean more moving parts for the system as a whole. It doesn't sound impossible but would be a lot of work and feel close to starting from nothing.

[@DarthJadus95]

Hi Martin ! That’s great thinking ! Making structural parts a functionality is a great way to optimize your design. However, don’t forget that structure has the primary functionality to… holding everything together and making the overall design sturdy enough to uphold its own weight ! For instance, I find the design of the new wheel lacking sturdiness around the axle. The comes the concept of putting into position and maintaining into position (« mise en position » and « maintien en position » in french). This is another trick of engineering that helps you design links between parts in order to insure a specific type of link (like a pivot, or a slider). First, you need to identify what kind of movement you’d like to have between one part and the other, identify the kinematic of the link. That gives you the degrees of freedom of your link, and the degrees that you need to block. Once this is done, depending on the geometry, you can design your links so that they do insure the right kinematic link without any kinematic noise. Coming back to the wheel, I feel like the lack of structure might make your wheel « wobble ». To avoid such issue, I would add a structure around the axle, linked to the wheel from one side to the other. Anyways, hope this helps you design better ! If you need any help on your design, I’d be glad to helping you on your adventure !

[@Loompia]

The consistent and genuine love and excitement for learning that comes across in these videos keeps me coming back. Keep up the great work!

[@ilbey]

i love how you transformed from an hobbyist to leonardo davinci, thanks for sharing all your progress with us, means a lot for people loves mechanical design like me.

[@kittonsmitton]

More Brilliance from you Martin! Design is music made in solid 3D form. Compose away Conductor Martin!

[@jackmino729]

You can see this sort of design principle in rocketry as well, a lot of early rockets (like V2s) had the fuselage separate to the fuel tanks, which were shaped pressure vessels, before moving to aluminium stringers and isogrid structures allowing them to use the walls of the fuselage as the tank walls, saving a tonne of weight

[@TheParkAttendant]

Marble Machines 1 and 2 are still works of art! 1and 2 served as a leaning experience. You couldn't have even started 3 with out them.

[@sleepydog9968]

structural parts to functional parts **chef kiss** also, a big win on simplifying the cost/quantity of parts required 🙌 similar to the concept behind "compliant mechanisms", especially 3D-printed ones

[@HeatStoker69]

I get so happy whenever you have these great ideas and unlock a new design. Keep going, Martin

[@MalcolmAkner]

"My old professor Albus Dumbledore", haha what? So effortlessly snuck in, I had a genuine wtf moment there xD Love hearing you talk about your design, and your methodology is very applicable to my own work. Make structural parts functional is a great maxim, I will start using fructural as a term!

[@D3nn1s]

Definetely make sure to check for deflation in the middle of the wheel since the bars are quite long and to check for twist as well. Depending on material choice and how you mount them theyre like rods, so they dont have a lot to counteract a twisting motion. However it looks like a great start, lets hope it passes your thorough tests ;)

[@ast_rsk]

Another specific structural-to-functional change was the pins themselves, ever pin that physically snaps into 2 (or more) of the slats, will increase the rigidity of the drum even more. Loaded with a full song, the programming wheel will be stronger than one without notes installed.

[@machinethinking]

In the early 2000s Buell put the fuel into the motorcycle frame. The GM Autonomy concept in 2002 had the first skateboard style "battery" - a hydrogen fuel cell.

[@Dug6666666]

Formula 1 car designer Colin Chapman is a good inspiration for efficient design, he would look for ways to reduce part numbers and to multifunction mostly to reduce weight. He was a pioneer in removing the steel tube frame approach for the chassis, instead he also borrowed from the aircraft industry and made the chassis monocoque (outer skin was the stress member), also the rear half of the car had no chassis by bolting the engine rigidly to the front of the car it became the structure for the back of the car. Further to that the rear suspension was bolted to mount points designed into the gearbox.

[@annas8079]

I think you'd be interested in TRIZ - the Theory of Inventive Problem Solving! The goal is to replace trial-and-error brainstorming techniques with a more defined method to solve technical contradictions/tradeoffs. There are other ideas that tie it together like the concept of visualizing an "ideal system" and "utilizing idle/available resources" (like the plane did by moving the fuel to the wings!), 40 principles, and tons of real-world examples.

[@GearsAndBricks]

I am so excited!! When I clicked on this video to listen to it, I ended up watching it instead- twice! This is so very much like how I have begun to think now (and it is partially because of Wintergatan). I was actually just thinking of how to make the structure of an actuator aid in the movement of a second system within a LEGO build. Thank you, Martin, for sharing your ideas and lessons! You have helped me in my own design career and hobby. …Pain is temporary. ⚙️🙂

[@Sulphur_67]

the programming wheel is gonna twist around the screws holding the programming slats, maybe by using two screws or adding some kind of pin in the slats that sits inside a groove in the wheel hub parts, it could stop a roation from happening around the the screw holding the slats in place

[@hanzazazel412]

These solutions are more elegant for sure. Hope it all comes together in the end

[@sethubaghs5551]

In the sixtees Team Lotus were the first f1 team to use the engine as part of the chasis making a part essential for the funcion of the car a structual part, this reduced weight making the car faster. I recommend you take look at the design philosophy that Lotus uses for their cars, its a great philosophy that can be aplied to anything (simplify then add lightness).

[@stephensteele3553]

They were just adding lightness.

[@ThisIsGoogle]

Lotus got fucked and is no longer racing

[@blockstacker5614]

farm tractors laughing at those bozos lmao

[@stuffiguess7680]

I feel like with the small bearing, and rod its going to create a lot of torque which could mess with the timing, and the plastic beams are separated, which could mess with timing. I would make notches for the programming bars, and add more structural parts, as well as a a larger bearing, and I don’t know your gear ratio yet, but I believe you want a larger gear, for the actual center bar. Remember functionality is more important than simplicity, or complexity. It’s a double edged sword

[@AndersJackson]

What you describe in the end is what I feel when I understand a software problem and solves it in an elegant way. Så jag håller med, och inte bara som ingenjör och musiker, utan även som programmerar och lärare. När det clickar, så är allt ljuvaste musik. 🙂

[@_asd2769]

One thing to keep in mind is the most specialized and efficient part is not always the best option. To give an example, instead of using a smaller screw that's gonna be good enough for what we need it to do we can instead use a bigger screw that we're already using a 100 of. Standardization can keep the time, cost and complexity down.

[@TroggyPK]

Footnote about moving the fuel tanks to the wings in planes, it was a better solution for the plane overall but it made running electrical and hydraulic lines through the wings nearly impossible. So there still was drawbacks mainly in the increased production time and cost.

[@broke_gamer_]

This video gives me hope for the MM3. I cant wait to see the build start! Bravo!

[@peterroshouse]

To start with, IANAE. My thought is about the large size of the drum that is mostly air. An idea is to create a hubless drum and control the motion from the exterior edges of the drum like a gear. Don't know if it would be needed but then the inside of the drum could be used for possibly another layer of programming pins facing the center that could be accessed through the ends of the drum. Of course there wouldn't be as many as on the outside and timing would need to be worked out but maybe provides more options. Also, a second layer depending on how it was constructed could add more rigidity to the drum which has been mentioned a bunch in other comments. BTW, loving the continued content.

[@lo-firobotboy7112]

Structural parts perform a very important function. They provide structure.

[@1AMERICANWORKER]

I have retired from the motor sports industry after 47 years. In that time I drove, built, and designed at least 40 cars of all kinds. One of the standards of racing is the cap plate and the mid plate. The cap plate goes on the front of the engine block. It's made from 3/16 inch aluminum and bolts directly to the face of the block, sandwiched between the block, water pump, and everything else bolted to the front of the block. The mid plate does the same thing at the rear of the block. Both plates were wide enough to span to the frame on both sides, where they were bolted to tabs welded to the frame. The mid plate was sandwiched between the engine and transmission, with the block tapped for the bolts and clearance holes in the trans. A method I used was to tap the top 2 bolts that held the trans to the engine in the mid plate. Now these 2 bolts were only backed out till the bolts were out of the block, still holding the trans in place. These plates not only sped up our engine changes, but made our engine and transmission a frame stiffener.

[@commanderbaccara8578]

As an aircraft maintenance engineer, I am very happy to see you talking about my favourite thing in the world, airplanes (after music of course;)

[@otiagomarques]

Yes, sir! Pure beauty! This machine is gonna be so beautiful!

[@ericbowdridge3484]

F1 style cars are like this. The front end is a seat and steering, the rear end is a differential and transmission and the motor is solely what hold the two together. Rob Damn has a few great videos tearing down one of these.

[@itbgmultimediastudios1815]

It's funny how we the same people are into both like myself

[@Koooo4]

What about the stuff between the engine and the seat then? That doesnt count? ;P

[@andybwilly]

I gotta say, the old clock escapement gates were just plain beautiful, and just seeing them brings me back to the glorious episode where you finally got them to work. I really hope that once the general design for MM3 is coming to an end, you take an epic side-quest beautify MM3 and implement some of the old sexiness of MMX. And maybe a couple of grinder-scars?

[@kaseymathew1893]

Painters and sculptors decorate space. Musicians decorate time. You're doing both!

[@OfMoachAndMayhem]

Maybe another take from the aerospace industry to prevent warping of the cylinder: Diagonal reinforcement WIRES. See the wings of early biplanes, they had those cross-bracing wires exactly to prevent the parallel wings from skewing. A number of cleverly arranged steel cables with twist tensioners inside that drum (something like a very tridimensional bicycle wheel spoke layout) would not only prevent warping and twisting, but it'd also look really cool

[@Not.a.bird.Person]

As someone who recently graduated from aerospace engineering, I would also add for the fuel tanks that the reason we say it helps with ''weight distribution'' is that it's also a dynamic balancing problem. Since you use up the fuel during flight, your center of gravity shifts. This can cause issues for aerodynamic control because the center of lift theoretically stays the same and you now introduce a slight torque on the aircraft if the aerodynamic center is not exactly on the center of gravity. The higher the torque (or mismatch between the centers), the higher the aerodynamic compensation requirement increases which then means the more the control surfaces need to be used to compensate. Since the center of lift is generally between 1/4 and 1/3 of the wing chord, putting the fuel in the wings makes for the easiest dynamic balancing solution because the torque created will be at it's lowest the closer it is to the wings.

[@examinerian]

Great idea, using Strunctional Parts (to give them anothet name). Also, if you don't mind, I think I'll fly with someone else - Wintergatan Airways' idea of landing perfection looks a bit crashy!!

[@ThePattersonrr]

We are with you! keep up the great design work.

[@blackest3314]

The thing about the MMX program wheel though, is that the panels could be easily changed for different songs without dismantling the whole thing.The program wheel in MM3 does not have this feature anymore, so if you want to play a different song you need either to change all the pins (which could take a long time, with the pressure of being live) or replace the whole wheel. It does look fairly light weight (although awkward to move around on stage on the fly), but it doesn't appear to be easily changeable at the moment. I'm sure you will come out with a solution, just wanted to point out that some of the structural parts in MMX were indeed justified. I actually liked the mechanism for changing the panels a lot, it was pretty neat :D EDIT: I get it that Martin already explained that he's going to change the whole wheel on stage (it's the only reasonable option anyway). What he didn't consider is that having the wheel to be easily detachable adds lots of problem to solve which were not there in the MMX.

[@Dannerrrr]

The whole wheel will be swapped per song.

[@darkiee69]

Go watch the previous video, he talks about it there. There will be more than one wheel, they'll change the wheel when the change song, and someone back stage will "reprogram" the wheel they took out for the next song.

[@blackest3314]

@@Dannerrrr yeah it seems the only logical solution. This opens a whole can of worms though, since the wheel has to be easily accessible from the rest of the machine (Imagine how this affect the pin readers, which touch the wheel). Also the wheel is subjected to rotation at high speed (which beg for stability), while being able to be easily detached. I'm sure Martin will figure it out, but there is a whole new set of problems which were not present in the MMX with the changeable panels on the wheel.

[@billkeithchannel]

@@blackest3314 Maybe he needs to look at the engineering of a gun revolver. The hammer pulls back and the barrel hinges to pivot the rotary chamber up so it can be removed for bullet reloading.

[@LonicGheshu]

While I loved the MMX and would be happy to hear one song for it, it wasn't built with a lot of modularity in mind - just look at how many times the angle grinder came out. Those MMX drum plates couldn't be easily removed. Martin had a terrible time trying to sync them together to make sure the timing was right. Replacing a whole wheel is undoubtedly easier. One of the earliest videos for the MM3, Martin talked about modularity and having interfaces between parts as a requirement to allow maintenance and feature upgrades. So far he is concentrating on functional modules so designing those interfaces will soon come. I agree it's going to be a challenge, but it's already heading towards being a much more serviceable machine.

[@horasiertsema2380]

You might want to look into FMEA methods. It is a systematic method to identify failure and effects of design.

[@anthosrandomstuff2979]

thx for the design techniques

[@DaniDipp]

"potentially feasible" is good enough for me. Great job, Martin, and thanks for the explanations!

[@eveleynce]

one aspect of moving fuel from the fuselage to the wings is to eliminate the fact that fuel consumption would change the center of gravity for the craft, which would require pilots to continually adjust the trim of the craft over the duration of the flight. Moving the fuel to the wings would allow it to drain perpendicularly to the center of gravity, and would reduce the amount of adjustment needed during the duration of the flight

[@siegfriedkettlitz6529]

Engineering is about making the right compromise. If you are lucky you can define some optimal conditions and if you're really lucky you can achieve them independently. But usually our boundary conditions are not well defined and you have to make decisions based on gut feeling. Combining functional and structural parts can be really smart. It can also be really stupid. The devil is in the details. Knowing about this technique is good. Having experience with it is better. You need to try out a few things and fail or semi-fail with them to develop that gut feeling about which approach is likely to succeed. Watching Martins journey in this area is really interesting.

[@ameunier41]

I would like to see a one gate prototype, just to test how everything play together. Even F1 engines begin with a single cylinder engine.

[@KiddsockTV]

Thank you for not giving up!

[@jaromirandel543]

Generally the aircrafts always have been on edge of technology. For example Concorde which was very advanced in its time - technological masterpiece. The incredible technological solutions associated with the problems of supersonic flight, heating the fuselage of the aircraft, navigation system, pressuresation system, it's seriously great.

[@Pscribbled]

You may be counting your chickens before they hatch on your slats. The stiffness of the slats in the center may not be sufficient enough for your needs. Could be good to test the stiffness of those slats by manufacturing one and testing the stiffness

[@claytonfs]

I don't remember the exact materials selected for the "spoke wheels" and "pin bars" but I foresee a few rigidity issues with this design. Depending on how the bars are attached to the wheel rims and if the whole wheel is driven from the axle or from the rim, there could be a tendency for the whole thing to twist. Because the rigidity of the old programing sheet is gone, the bars could end up like \\\\\\ instead of | | | | | | . There's also the more likely issue of this ( ( ( ( ( ( happening over time as the middle of the bars are essentially unsupported. Then there's the possibility of all the spokes flexing side to side in unison and the outside cylinder kind of jiggling back and forth over the hubs causing the pins to possibly miss the registrators.

[@MrGonzonator]

Just don't forget it was the marble pump that failed on MMX. A solution to that is critical and should not be put off...

[@NochSoEinKaddiFan]

One more reason to move the fuel into the wings: it is a hollow space that you can't do anything else with, really and you free up more space in the body of the plane, the only area that you can use for transportation of people and goods. So on top of all the mentioned benefits they also increased the loading volume of the plane.

[@Stalgicmusic]

These new videos are very good. I watch every single one.

[@lumpi6653]

Hi Martin have u ever thought about designing the music wheels like tank chains. they are easy changeable in between the sets during liveshows. And rolled tigerther they should not take to much space. And you could still work with your absolute genius pins. Which are brilliant imho.

[@DirkPeki]

If you mill grooves lengthwise into the programming plates from below, they become much more stable and cannot be bent so easily. I think to keep the programming wheel from becoming wobbly this should be taken into account. Best regards

[@plutoplanet4275]

Looks fructurally brilliant

[@leonclementsbeall2562]

That stuff poured on the batteries looks like Tinsil (tin based silicone) and is often used for mouldmaking

[@leonclementsbeall2562]

It's very distinctive as a pink rubber due to the red catalyst of the condensation curing silicone

[@peterjohnson9438]

Just by looking at your new wheel design, it's going to need at least a center brace in order to keep it from sagging; it's also going to need some form of transverse reinforcement in order to not twist. Having a solid center axle to which both ends of the wheel connect rigidly would suffice. The center anti-sag support is going to be necessary, though, because the crossbeams will have a tendency to deflect down due to gravity and in the direction of motion, leading to inaccuracies in the music - both through arm lift variance and engagement timing.

[@atmk]

Scrolls are one part.... I'll shut up now.... You've done amazing work

[@Tulia92]

🤗 я до сих пор поражаюсь, как переделали из бомбардировщика в штурмовик самолёт за месяц. Вот это мне кажется верх искусства создания крыла.

[@zemodeus]

By the time he finishes MM3 he will forget how to compose and play music and will just be a straight up engineer lol

[@tantamounted]

Ten spokes or cables wrapping half clockwise and half counter clockwise connecting the ends of the flat spokes on the main structural wheels would do the job. Connect them two spokes over from one end to the other so you get cross bracing.

[@arghjayem]

01:22 and here I was expecting you to reference the Mosquito Bomber for its use of wood and plywood in its construction! 😂

[@elgage]

Aerospace is all about optimization. Im studying aerospace engineering. It's crazy what we have to do with the limits we set for ourselves.

[@Svammelgurf]

Am i the only one worried about note resolution on the programming wheel? The length of the musical loop is limited by the note resolution and the note keys on the programming wheel are so much larger than the earlier designs. :)

[@2nd3rd1st]

That's it! Add wings to the MMX, fly it onto the stage remotely and save tons on air cargo fees