5 Suspension Types Demonstrated with Lego
ฝัง
- เผยแพร่เมื่อ 27 พ.ค. 2024
- Hi everyone,
for this video, I've researched some different ways of suspension used in real cars, and tried to simplify them so that they work in Lego, while still being useful
Enjoy watching,
2in1
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Links:
Custom Springs: • 9 Custom Springs/Shock...
Rebrickable (part list and .io file):
Independent swing suspension: reb.li/m/167196
Double wishbone suspension: reb.li/m/167177
Trailing arm suspension: reb.li/m/167176
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Timestamps:
0:00 Intro
0:06 Springs
0:20 Direct Suspension
0:56 Solid Axle Suspension
2:16 Independent Swing Axle
4:17 Double Wishbone
5:45 Trailing Arm
6:44 Trailing Arm Variations & Improvements
7:40 Thanks for watching!
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#lego #technic #suspension #car - วิทยาศาสตร์และเทคโนโลยี
Enjoy watching!
The custom springs video: th-cam.com/video/FtiaOsQ_5O0/w-d-xo.html
FIRST yay
I have taken you up on your request for correction. Sorry for the rant, it's a topic I enjoy. I hope I don't come across as lecturing. My comment is probably longer than the video 😂😂
@@servantking1519 Thank you :) Really interesting stuff
A couple corrections in terminology since you asked for it, plus more info for anybody here who's interested in this type of info:
At the beginning of the video you called the spring a "shock absorber". While they look very similar, a sping and a shock absorber are (usually) two separate devices in two separate parts. The spring provides all the force to support the weight of the vehicle, while the shock absorber is mainly to stop the vehicle from continuing to bounce up and down after going over a bump. It does this by resisting the motion of the suspension and essentially soaking up and energy it has in the form of physical oscillation.
A common type that is very similar to one you did show is called the MacPherson Strut, it is essentially a strut (a combination of a spring and a shock absorber) on the top with a single control arm for the lower end. It it used in the front and sometimes in the rear as it is cheap and simple, but works well enough for light passenger vehicles. If used in the front, the strut can rotate to allow steering. It can be used with driven or non driven wheels. The problem you mentioned with the wheel angle changing is a real consideration, however by selecting specific angles and geometries for the lower control arm the actual change in wheel angle to the ground can be very small. This means that it is not a major issue in vehicles without very much ground clearance or suspension travel.
A trailing arm suspension is typically used in the rear, and appears on a lot of small cars from the nineties and early 2000's, also you have it backwards in your last shot with it. They almost always point outwards from the centre of the car, and are only used in the front in very large/heavy duty trucks.
The double wishbone suspension you showed is pretty good, the solution for the axles for driving it is to use special universal joints called CV joints (constant velocity), since regular universal joints actually have an output that varies in speed throughout each rotation.
A torsion bar is not a type of axle, but rather a type of spring that is used in place of a coil spring on certain trucks, most commonly on mid-size or large pickup trucks. It's used with a double-wishbone suspension I think exclusively, because it uses it's twisting force to rotate the lower control arm downwards.
Another type of spring is The lateral leaf spring, which would be hard to do with lego I guess, but it's essentially a long flat flexible piece of spring steel that is mounted to the frame and to a swivel attached to the frame elsewhere. Usually used with a solid axle, which is mounted to the middle of the spring, this type is often found in the rear of pickup trucks, which variable spring rates being a common feature achieved by having layers of springs of different thicknesses which start to bend at different points. More rare is the transverse leaf spring, which is used in a lot of corvettes including the c7 corvette. It is used in that case to save space. It goes across the rear and is used for both wheels.
A solid axle is typically suspended by either normal springs or leaf springs, or occasionally by trailing arms. Other than that, yours isn't too bad.
One other feature you missed is a part called a stabilizer bar (aka anti-sway bar, or sway bar for short). It functions to reduce the amiunt of roll the vehicle experiences when going around corners. It does this by connecting the left and right side of the suspension in such a way that one side tends to pull the other side towards being at the same height at it is at, and vice versa. This is most useful for high-speed cornering, and I've seen some people remove it or cut it on their offroad vehicles (though I wouldn't recommend doing that). There actually is a version for heavy duty offroad trucks that allows the system to physically disengage using a button inside the cab. The advantage of not having the system is that you can habe greater suspension travel with it disengaged, and therefore have the wheels in full contact with very uneven ground.
Lots of other info is available of you want to learn about car suspension systems, it's a very interesting topic in my opinion because I like math and geometry, and as a mechanic I have some experience with most of these systems. Feel free to ask me if you have any questions. 😁
Thanks a lot for the long comment, you've definitely brought up some things that needed clarification. The 'shock absorber' thing was intentional because that's the official part name of the Lego part, but you're right, it's not really fitting here. The different geometries and optimizations are interesting too see, that really shows how much consideration goes into designing every small part of a car.
My head hurts
Really nice! I didn't think about the use of magnets, but I'm really curious how they'll perform in a Lego model.
Yeah, you'll definitely need a better holder than this so that they don't just slip away under load, and I think then they might actually be useful
Magnets are a great idea, less moving parts reducing fatigue.
As someone who just started with lego technic with zero skill & trying to build my own RC car, this is extremely helpful, thanks!
It would be very cool if you use suspensions with magnets, but also rubberbands to avoid aggressive decompression and boucy behaviour. But magnets need to be a bit stronger than rubberbands or you'll get a non fully extended decompression. I believe that this would work great on heavy vehicles.
The magnets are very elegant ❤
This was actually super informative. I'm glad this got recommended to me
If you build swing axle properly, you will get grip, even with normal ride height.
Sure the axle will lose grip at full droop, but this is also an benefit, as the opposite happens with compression.
As the suspension compresses, the wheels get positive Camber, which then in turn allows for better grip during cornering.
Big brain
You should do front wheel steering and driving
Very sophisticated 👌
i love all your vids, specially in the night before sleep
bro said he isnt an engineer, hes so humble
Great video as always.
can you do a pushrod suspension but at the cantilever you don't attach a regular spring but use one of thos x axles as a torsion bar? this is how F1 do their suspension. so a normal pushrod (or pullrod) suspension but there is no spring attached to the cantilever, but the cantilever pivot point is a x axle that is attached to the chassis away from the cantilever in an x hole, and then held in place close to the cantilever in a round hole and the cantilever is attached to the x axle with an x hole also. this x axle will then twist around itself to provide the spring action. very small setup is possible unlike with spring parts
The magnets are genius
3:28 aka Tatra suspension!
(At least this type)
you deserve more attention... this stuff is great
Very nice
can you please make a video that talks about how to combine suspension and steering? thanks a lot
very nice video. (:
but for steering?🤔🤔
Steering buggy Lego technic' control
thats for the back
Shhhh
@@ethanshoemaker5582 actually most of them can
@@shebadogeCan number 3 be modified for steering? If so, how?
Round not flat wheels are better for solid axle suspension
Hi I love this channel it's helped me so much 3:16
why you using the stronger shock absorber?
I have a vehicle with solid axle rear independent front suspension and one with solid rear torsion bar front I plan to replace the torsion bar with normal independent suspension
Genius! 🔝🔝🔝🔝
At one point, I believe you typed "suspesenion" instead of suspension, but I have no other corrections to offer. Great video, thanks.
Yeah, I've not seen that before watching the Premiere, so I couldn't change it anymore :D
In an automotive application - even a Lego car - the springs one and only job is to hold the vehicle up. Not to absorb any shock.
Yes, they are not called shock absorbers but springs. But no, their only job is not to hold the vehicle up, you'll notice that when driving over a speed bump with a not-springed vehicle
@@in1 🤦♂️
As a person who is trained in these principles I can say with complete confidence that springs - even in this application - do not absorb shock. They do allow for movement in the suspension, but they only hold the vehicle up at the desired height. Shock absorbers are for ride control and are tuned with compression and extension parameters for the application and limit unwanted ‘bounce’ and oscillation. A spring that isn’t controlled by a shock absorber will still transmit harshness through the chassis and if allowed to oscillate can even make any occupants in the vehicle seasick. I’ve spent a significant amount of time in suspension theory, engineering and design and have built several suspensions for many different applications.
I’m not a troll simply trying to make someone look bad; this is a great video that shows several principles in a fun way.
Oh, well that does make sense. The only reason that name is in the video is that the official Part Name is shock absorber, but yeah it's a spring and prolly won't make drivig any smoother
Can you build and demonstrate MacPherson Strut suspension?
I've skipped that one since it's more or less #3 with the spring somewhere else, but you're right
My summer car veterans: I seen enough. This is bullshit
how can you steer with double wishbone
#2 is just pendular suspention with rubber bands
Yeah, it has a lot of names. I guess you could have also named it dependent swing suspension, but in this case I just went with the wikipedia name
nice ! do u know where i can find the parts? thanks
If you need specific parts bricklink
nice video ^^
Very nice work, but ,please, get more lighting and turn the aperture DOWN, like 8.0, and turn the auto focus off.
Hey 2in1Bricking. BACK ON MY MISSION TO GET A STREAK of being the first one to react to your comment just to show how much I like your channel 🎉
st build like
Когда уже Лего покажут
а это не лего?
You are a fucking genius but you are kinda not using it for the best purpose
Hi I love this channel it's helped me so much 3:16