Unnecessarily Complicated Steering
Вставка
- Опубліковано 30 вер 2024
- How do you steer a Superfast car? It's more complicated than it sounds. Not because it has to be, just because I made it that way.
Become a Patron: www.patreon.co...
Get Your SFM Merch: superfastmatt....
Superfast Matt is supported by:
SendCutSend - For Fast laser cut parts, click here: bit.ly/34eGomq
Subscribe - www.youtube.co...
Instagram - / superfastmatt
Twitter - / superfast
When he showed the arm restraints, I could only imagine how funny it would be if he had replaced them with fluffy pink hand cuffs hahaha
Clearly this should be something we petition of him.
Yeah , and these would be rated PSV (Porn Shop Verified) but I wonder if SFM would then pass tech inspection at El Mirage !
My first thought was "kinky!"
kinky
My first though was the suspicious look he would get from the inspectors. Loss of credibility comes to mind.
Wait. Hold up a second.
So you're telling me there's a sport that combines automotive fabrication, conspicuously overengineered bespoke mechanical systems, and bondage?
Why am I not doing this right now...?
it also requires a dry salt lake bed!
@@Born_Stellar
and slightly moist lips...
Best of all, there’s a higher than normal risk of death!
@@dooby1445 Don't threaten me with a good time.
@@Born_Stellar By sheer coincidence that's my favorite kind of salt lake bed.
Technically escape velocity does require direction. Launching towards the center of the earth may not achieve desired results
You just have to maintain escape speed through the earth, somehow.
@@SuperfastMatt I'm curious why NASA haven't contacted with you Matt yet 😄
You are technically correct - the best kind of correct.
Minor design error. Even god is not perfect.
"may not achieve results"
It's a non-zero chance then.
You know, with enough math we can figure out a function that describes “Matt time” and then we can successfully predict any ”Matt time” into the future! And when it inevitably fails us we’ll call those outliers and throw them out as bad samples.
Thursday at 8 AM PST +/- 167.99 hours
@@maxfcanto Precisely! Hats off!
Problem is the feedback mechanism, where Matt observing the function causes it to collapse into a heap of broken logic. Slightly less gruesome than using isotopes to maybe poison a cat.
I have a feeling that "enough math" would require a supercomputer to run starting now and ending sometime past the heat-death of the universe.
Found the engineers
Never thought I'd see Matt discussing his bondage gear on the channel...
kinky!!!!
Honestly, designing a mechanism with 0DOF and making it work because you count with the tolerance of the real world is kinda brilliant. I admire that.
Sidecar rider here (CBR1100XX hack, it's sweet, also uses front swingarm hubcentric steering). You'll find not countersteering is surprisingly natural. Your brain adjusts almost instantly when the bike/car/whatever doesn't respond the way it thinks it should and will instinctively steer in the direction it needs to.
Agree. Just like maneuvering from a parked location.
On bicycles, you don't really countersteer at low speeds, and at high speeds you don't have to do it consciously because a 10-15kg with an 85-90kg rider means it doesn't take much countersteer for the centre of mass to project down to the apex-ward side of the line between the contact patches, and you don't have the bike's intertia fighting you.
yeah an ATV is setup the same way and those are totally intuitive to steer.
I love it and high horsepower cars!!
ua-cam.com/video/9kphvGyN9-0/v-deo.html
I was thinking how natural my soap box steering was with rope attached to the axle.
Even better with my feet on the axle and my legs as dampers
Your design philosophy reminds me of one I used to ascribe to the German engineers, back when I was in tech:
"Why use only one part, when two will do?"
the german word for redundant..is redundant which makes it redundant
I think your steering looks good. Remember to hold all of the rod ends with oversized washers. Stop by our pits in June. Old tradition was streamliners used 3 or 4 of the same number (111, 999, 8888, etc. ) Too bad someone took the "last word in LSR" - 9999
why?
This is very similar to how aircraft flight controls work. You’ve basically built a rudder system lol.
Since it is at the front...would this be a canard?
Can ardly turn in any direction....
@@JohnSmith-yv6eq canards are horizontal flight surfaces, not rudders, but it's worth overlooking that for the pun. 😁
“… and the salt turns pink with the ground up paste of what used to be your arms…” I literally can’t stop laughing!
Love your videos Matt, thank you for a comedic and hilarious but super intelligent and informative way of investigating and remedying sometimes perplexing and increasingly difficult design considerations and constraints to achieve greatness and satisfaction for the projects and adventures you embark on. You also have the unbelievable willingness and outright decency to invite us peasants, amateurs and lower forms of life along for the ride. I have an enormous respect for your work and Mad skills, developing, designing, manufacturing and implementing so please keep it forthcoming, Thank you. Brent
Matt - What about taking the chassis out to a long smooth hill and gravity drive it to test steering/brakes? Would reveal any large errors - and make for an entertaining video! 😎
... would be a hella expensive Soap Box Derby car...
Or push it really fast with the 4Runner
Remind me to change the combination on my luggage!
The Department of Redundancy Department approves.
You mean department of redundancy department of redundancy didn’t you?
@@daleolson3506 Of Course!
Trying to decide wether to make a comment about engineers watching your video who then have an overwhelming compulsion to ask you if you "want to know a better way to do that" or simply an all caps "TO THE MATTCAVE!". Probably just go with the engineer joke and an algorythim hail
Maybe I'm captain obvious here but McMaster-Carr have free 3D models for most of their parts. It's awesome when doing mockups in CAD.
In order to get a landspeed record you have to do it in one direction, then turn around and get the same speed going the other direction. The opposite directions on the velocity vectors cancel and you're left with a simple speed not a velocity... or something 🤷♀️
Think you're right there. If you ran 201 "up" and 205 "down" the course, your speed would be 203 = 201+205/2 but your velocity would be 204-201 or vice versa. Ie +/-3? But this would be less than 2 runs of 50 and 60?!
That's not quite true about escape velocity, you ain't gonna get to space if you're pointing down.
Depends on your personal beliefs in deities, the afterlife, and the hypothetical location of said afterlife.
@@cliffdavis
and if there is the correct sized hole through the flat earth.....
Having worked for big 5, I lean to the 5 guys hope 🤣
The steering will feel strange.. as opposed to laying down in a square cigar tube peering just over your toes at 200 mph. Sure. The weird bit will be the steering.
I am pleased by the Spaceballs reference.
There's also a way to add the 5 even without sponsorship; just name it after Lone Star's Winnebago, the Eagle 5. Eagle goes above the number, 5 goes after it.
There are several directions that if you travel them at escape velocity you will not leave the planet. Of those directions most will have you meeting the planet and being smeared across it.
This is why Matt is ex-Tesla, not ex-SpaceX.
Adjustable wrenches are my favorite tool for rounding off nuts and bolts, and now they'll be my preferred tool the next time I need to add some rake angle to, well, anything really.
Adjustable wrenches are better for bending sheetmetal than their intended purpose.
@@DangerDaveMurray he's out of line, but he's right. 🤣🤣
They are really good for massaging out any bending in chainrings or chainring spiders.
They're also excellent at seeking, finding, and smacking fingers when doing anything with them at all!
fyi...... theyre now called "all 16ths wrenches"
We really need a SuperfastMatt and Bad Obsession Motorsports colab at some point. You both make amazing overcomplicated and absolutely beautiful mechanical stuff.
BOM could help him up his bracket game. He doesn't use nearly enough CAD.
@@JDWDMC Indeed. Matt needs to incorporate that cardboard into his workflow.
I’m on the crueler end of engineering theory and I would say the steering redundancy was how you dialled out any backlash? (Basically end load the steering rods via the track rod)
Still waiting on the “All hail the algorithm “ stickers
a forward linkage is actually more common than you think. any linked solid front axle vehicle uses this configuration. it naturally gives antidive/ antilift. the way you use the rack is make an intermediate bar to go in between, then mount the joints at whichever point you want. You are right on point with the steering, all linkage systems have some compliance. also your model doesn't account for the steering inclination and castor of the steering, so maybe it binds even less or more than your flat drawing. dont get to invested in getting it perfect though, oem's dont even have perfect geometry. imagine if they had to have different racks and knuckles for every length of Tacoma.
Built lots of stuff and your steering looks fine. Just a few tips for my experience. Lubrication free ball-joints with a teflon lining start out without backlash so I prefer them for precision linkages. 2nd, the redundant steering links will let you preload the whole linkage to eliminate backlash from other sources. 3rd, what's the back-lash like it that u-joint shaft? Never had good luck getting low backlash with a cross-bolt, but clamp collars have always served me well. (weld a coupling nut on and slit the nut in half for a quick easy clamp-collar.) 4th, how much backlash do your suspension and steering spindles have? That's another source of bump-steer which will be no fun at >100mph.
Okay, I was doing my best to be an adult watching this, but when you include a spaceballs clip I about fell off my chair. My wife was giving me that "are you insane?" look. Showed it to her, and her reply was "...why is this funny?". She just doesn't get it sometimes.
The interesting thing to me about the steering set up was that someone this week mentioned how a certain fictional motorcycle turned. It was by changing the lengths of the struts that held the wheel and I hadn't realized until they said it. I thought that was a pretty interesting (if somewhat over engineered) design for a motorcycle, and this sounds very similar.
you're really pumping out videos at an excellent rate lately, impressive
not this matt channel
I also watch matt's offload recovery aswell 😉
0:31 I'd argue the direction is also important. If we're talking about "escaping" gravity, then it doesn't matter how fast you're going if you're pointed at the earth, where all the gravity is. Then you won't be escaping anything except your future responsibilities.
But in theory you could...
As a current student in Aerospace Engineering with an Astronautical Focus, with orbital dynamics the direction you point your rocket is incredibly important! The speed value of your rocket's velocity is only a part of the problem. Depending on your direction of travel that speed may not be enough.
For instance, if you fired straight up, your escape velocity would actually be HIGHER than if you fired into an orbit and then escaped from there. The reason being that when travelling tangent to the central body's (Earth) surface, you are taking advantage of what is called the Oberth Effect. Essentially the deeper you are in a gravity well, the less energy required to perform an ejection burn, and that burn is entirely a velocity vector and not a scalar speed. It would only work with a prograde (facing forward along your path of travel) vector.
As for coming off the ground, if you travel with the rotation of the Earth, you actually expend less fuel to get to orbit compared to if you injected into a retrograde orbit. The reason being you would need to overcome the horizontal velocity of the Earth's surface and then also still get up to orbital velocity.
I do agree it should be land velocity racing though. Absolutely 0 reason to call it land speed if it's all in one direction tsk tsk.
This is all in good humor btw! I love your content!
If the end with fire coming out of it points up, you will not get to space today.
@@SteveBrownRacing exactly what I was thinking during the video.
I'm not a rocket scientist, but... I have played a lot of Kerbal space program.
Thank you for the detailed explanation.You must be great fun at parties, too
😋
Hmmmm, in land SPEED racing, isn't it always the case that you must duplicate the feat in both directions on the course, in order to cancel slope and wind effects?
If this is the case, wouldn't it cancel out the direction part of the vector and reduce mathematically to a scalar?
Nerds!
I assume 1337 was already taken!
Your uploads are actually kinda eerily regular. I often can't complete anything in a month!
Hey Matt, I'm concerned about your over-center pins coming unlocked. Do the handles that operate the pins lock in place with a detent or anything? I use these style of pins and clamps daily in fixturing and the ones we use, the handles don't lock unless there's a pretty significant force acting on the main pin or clamp arm. Without a detent positively holding the operating handle in place, I'd be concerned about those vibrating themselves unlocked mid-run.
Btw, LOVE your videos, dude.
More great build & tech information.
Unfortunately, we (who are living vicariously thru you in Mom's basement) have voted, and you cant drive the car.
We cant take the chance of an issue, and you wont post a new video for any extend period.
I suggest running for president instead....
you and bad obsession motorsport should get together and over-engineer a car. it will never get finished but i'll eagerly anticipate each installment
I think the Veritasium channel has an episode on how Matt Time is not a universal constant as it's influenced by Matt Energy which is like dark energy but funnier.
I recognize that Motojitsu video. For anyone riding a motorcycle his channel is worth watching.
Does anyone else hate watching that second Matt? That guy seems really arrogant to me, and I can't stand watching him. It's a bummer because his content is right up my alley. He just grates on my nerves.
One for the algorithm Matt. Thanks for the entertainment. You go quite some way in restoring my faith in the American population, after several questionable years. (as viewed from Australia).
The lack of countersteering really messed with me when I went on a jet ski tour. 15 years of muscle memory screaming at me to do the opposite of what that ski wanted lol.
Never really bothered me on a four wheeler though, I guess the jet ski was extra weird because it did lean, just the opposite direction of a motorcycle.
"Land speed" and "escape velocity" are both correct. Land speed records require two passes over the course in opposite directions. The vectors cancel out. Escape velocity requires a vector that doesn't intersect with the mass you are escaping from (ie. the Earth).
Excellent as ever Matt - algorithm BIFFed💥 & KAPOWed🥊. Could you drive with the handlebars in the raised position, if you got fed up with the seating position?🤔
Like a stand-up jet ski? It would be very windy.
@@SuperfastMatt but better for your back 🤔
Good for visibility whilst parallel parking.
@@SuperfastMatt standing drive could be a new category. You could even have the first record!
@@SuperfastMatt $100 bucks to see a video of you doing a pass like this...
You should use sticks dragging in the dirt to steer and then you can make the wheels fixed. If you want to go left just drag the left stick and if you want to go right just drag the right stick. If you want to go straight lift up the dragging sticks.
Speaking of Matt channel’s, I’d love to see you as a guest on the SmokingTire Podcast one day.
Is there any noticeable play in the system? Looks pretty rock solid to me through the video but it can be hard to tell sometimes
I don’t know if it’s relevant but in my trials sport it’s common to use a steering rack mounted longitudinally using the forward end as a push rod to an Ackerman cross linkage. It keeps everything out the road.
I would mount a steering damper
The leverage ratio he has with bars that wide versus the arms on the shaft (the arms at each end of the forward/lower links seem about the same each end) means he should have plenty of control authority.
It might be a good idea, but the steering linkage travel is so short that a suitable setup using typical telescopic dampers would be difficult. Maybe a rotary damper?
Trophy trucks use a pretty trick rack set-up where the rack is mounted to the frame and tie rods are attached via a wishbone to the center of the rack so they can run the longer control arms with less bump steer.
Similar idea might work with a dune buggy center steer rack
I love your videos because I think I'm dumb but intelligently minded, and I feel that you're very intelligent yet "dumb-minded." I feel like you're my idol, but I still feel a sense of superiority as I immediately misstep and fumble my way through life and all my own unfinished projects.
Hey, you've painted the frame! Nice work.
On very few channels do I hit the like button before watching the video.
i dont know anything about these cars, but i can see someone getting their pinky crushed between the frame and end of the steering handle.
Like maybe youre doing sharp turn at the pitstop/ loading or unloading it to trailer and something janks the front wheel causing the handlebar to turn very fast.
I hobby older tractors without powersteering, and with them it's easy to break one's thumbs if the front wheels are hit while taking a turn
A build collab with Matts Off Road Recovery would be epic.
Ahhh, nothing healthyer than some zinc fumes from welding
Matt, thanks for the entertaining engineering class. This is how one of my physics teachers went about and the class was very successful. Keep up the great work!
The outro: You
The last shot in the video: The guy she tells you not to worry about
Are there any rules about quickly you need to be able to exit the car in case of a fire? I’m sure that’s already figured out but with the arm restraints and the steering locked in on top I might be a little more spooked about turning into black paste than pink paste.
There is a bail out time, but I forget what it is. I should be fine with that. I also have 20 pounds of fire extinguisher in two seperate systems and an SFI 15 suit.
Matt, with every video you post I be more sure that your channel is an instant success that took year to get ready.
Matt:
Ah yes, the most overengineered steering
BMW engineers:
Hold my bear!
Hold my Yogi Bear!
@@absenteeatom hold my Yogi Berra!
@@rennkafer13 You didn't get the joke. Read the OP's comment again
@@absenteeatom you missed his Yogi Berra quote in the vid, or you just don't know who Yogi Bear was named after?
@@rennkafer13 I still say read the OP’s BMW engineer’s comment.
I would argue that for any body escaping a gravity well there is a required directional component. Any direction where your course intersects the source of the gravity well will not result in your escape from that gravity well, no matter the speed. You _at minimum_ have to miss the object creating the gravity well, so it can still be termed escape _velocity_.
I love the shoutout to Matt's Off Road Recovery 🤣
If I could heart this video I would. The ending is brilliant!
V E L O C I T Y is a V E C T O R
some kinky arm restraints you got there.
bro thats finna bind.
ah nevermind.
Yet another hit to my under achiever complex. Excellent. More soon. Please. I'll wait
I'm sorry Matt the swing arms need to be gold. Start again... hail the algorithm
He could just paint them gold.....
Do I watch you because you are brilliant? Hmm?
Do I watch you because you are practical?
...because you're hilarious?
...you get shit done?
...because I wish I were you.
Hmm, not entirely sure I like the various metal spears aimed at you upper torso that double as steering linkages. The cable option just seems a bit less stabby in my mind but I'm sure the scrutineers have you and their insurers best interests at heart. be safe , go fast
Unfortunately, even well engineered push-pull cables suck. They have a lots of friction and low stiffness. Just like flex shafts, they sound great in theory but are rarely the best solution in practice.
I can't get enough of these videos man! They're soooo entertaining :D Please never stop.
Wow that flip up steering is brilliant. I love the redundancy put into it too
There are troublemakers who would claim that your "tabs" are in fact brackets. Which as previous episodes have covered no one has time for.
"unless you were driving backwards" hahah
While your definition of escape velocity is correct, your graphic is out of place. Escape velocity (or speed if you prefer) is the speed at which an object will escape earth's gravity, ignoring atmospheric friction, and WITHOUT ANY ADDITIONAL PROPULSION. That rocket is clearly propulsing.
Even if you consider the speed of the CSM immediately after the TLI burn, I don't think any part of that thing you pictured reached escape speed. Although it was close. My reading suggest they were traveling at about 24,000 mph immediately after TLI burn. Escape speed from earth gravity at the height they were orbiting is just over 25,000 mph.
And if it makes you feel any better, I do work for NASA.
KISSUTCSSLIWBFTDTDTBOKIS, you crack me up EVERY time I watch one of your videos! If you don't end up winning the Land Speed record and getting your picture on the Wheaties box or some outlandish sponsorship money you could definitely make it as a comedian!
Educate me pls!
As i see it caster will change with suspension travle. Is this effect negligible?
It does seems good to have more caster, and more stability, as the suspension compress, but how about just before take off?
On a bicycle, where the caster is set by the steerer/headtube angle, as the suspension loads up, the caster is reduced (the head angle gets steeper). Increasing head angle reduces trail, and if your fork rakes forward with the axle ahead of the steering axis (which they almost all do) your trail can go negative. This makes bikes twitchier while under load because inertia will provide less centering force to the steering and when the head angle is slack, 45° steering results in less than 45° at the contact patch, but also the leverage ratio of the steering increases because the contact patch is now closer to the steering axis.
It does change with suspension travel, but there is so little suspension travel that it shouldn’t matter. It was a bigger effect before I modified the swingarm.
I can't wait to apply the KISSUTCSSLIWBFTDTDTBOKIS principle at our next design review at work. Middle management are suckers for initialisms, y'know.
Looks good! I like the redundant push-pull linkages.
I wonder if it might be worth it to spin 3 different bell-cranks to bring, so if the steering linkage isn't to your liking, you could get it nice and comfy. [It doesn't seem right just to put multiple holes in the part, weakening it.]
Would it be prudent to get some kind of heat-treatment to normalize what few parts are mission-critical, perhaps with magnafux inspection, and at least get a 2nd pair of eyes on it before the inspector?
I have seen some motorcycle racing frames have air bleed holes, forming a common volume, which is pressurized from a Shrader fitting. A gauge faces the rider/driver. If a crack forms, the needle will drop.
Lastly, sunscreen, en.wikipedia.org/wiki/John_Britten
Love that WAN show reference.
Just discovered this channel and I love the comedy you built into the videos🤘🏻😂
Also I find your approach on engineering/ fabrication very intriguing.
Just curious. Are you going to add loops or hoops around 4 - links ? If you have a problem or a SHTF moment ., and things come apart, you don’t want to be harpooned. It’s in the rules too. Good luck , go fast. Be safe
PS Spun my AA/ GMR years ago doing around 190 . No problems except for changing out the depends. I
Turn your front assembly 180 º. Drag a single front wheel, don't push two wheels. Just like a shopping cart front wheel. The Citroën back wheel in the front.🙃 Another thing, instead off pushing rods to press on the driving bar, transform that into pulling rods. Hope that helps, I absolutely love the speed of your presentation!!!
Go for a nice shade of metallic blue then see if British American Tobacco will sponsor you with their State Express 555 brand, made famous by the Colin McRae era Subaru WRC team, and the BAR F1 zipper livery.
I don't know amigo, but.. the grip (hands position at steering wheel) will be horizontal like on a motorcycle? very different from the vertical grip of a car steering wheel. The question is whether you will be able to maintain steering accuracy at 350 km/h in suck bumpy road.. A motorcycle has only one steering wheel.. sorry my bad english. Good luck.
Yes. For the street: an alternative to a-arms for the front suspension utilizing linear bearings, center-hub steering and active camber adjustments based on body roll.
👍🏾👍🏾👍🏾👍🏾👍🏾
"The salt flats turn pink with the ground paste with wat used to be your arms"... HAHAHAHA CLASSIC!!! Hahaha I cried with that one! My cheeks and belly hurt now hahaha 👌👏👏👏 😎🇬🇧
All hail the algorithm... 1234 = about ten percent of the populations ATM card pin number... you know... the geniuses.
How it feels to chew 5 gum
I swear, your getting funnier every video.
🤣
Keep up the great work!
KISSUTCSSLIWBFTDTDTBOKIS!
Having a heavy damper on your steering would not be a bad idea.
Last thing you’d want is a resonating tank slap.
🇦🇺🤜🏼🤛🏼😎☮️🍀
For the sake of the algorithm I'll make a comment.....
On your comments.
I think you may have the best comments section on UA-cam, almost as entertaining and enlightening as your videos.
OK, scratch that..... More Entertaining and enlightening than your videos. 😋
I have to say, I watch MORR a fair bit, and it's good mindless entertainment, and frustrating as shit when he welds with his eyes open etc, and I've actually met the smoking tyre and he's seen one of my builds and it blew his mind and got specifically mentioned in a later pod cast, especially the fact that I had race tyres on a truck and was bare foot :-D But I think the calibre of your videos is far above MORR and probably the smoking tyre, too. I really enjoy yours, you get a chuckle out of me nearly every time, and there's some great details - self deprecation earns bonus points. Keep up the good work :-)
I think your understanding of speed and velocity is backwards. Land speed and escape velocity are named properly. As a mech engineer, I assume you took somewhat involved physics courses in college.
Ok you car number had me laughing
Actually…I wonder why “escape velocity” is mentioned……what you need is “escape acceleration”…..which is just above 1 G. If you could control your acceleration to around the 1 G mark you could get into space at a very low velocity.
StarShipTrooper………..I know you read these Mat. I’ve been commentinging from your earliest videos and even when you was on How I Met Your Mother 👀 😘
Yeh, two microns is less than the flex in ONE of the ball joints at the end of that connecting bar... I think you'll be fine.
But also, notice how in cars the front wheels turn at different rates. I'm sure someone somewhere has come up with the perfect equation for this motion and on a production car it would absolutely be invaluable to have - tyre wear and all... But on this - your total range of motion is what - 20°? And at speed it'll be a lot less than 1°. I think your tyres will survive just fine.