ALL HAIL GOOD ENOUGH (tm)

My goal as a Mechanical Engineer is to have Matt's humor!

Stiffness in an air spring is not simply a function of the air pressure - it also depends on the air volume relative to the effective piston area. You can soften an air spring by plumbing it to an additional rigid chamber. That means that for the same vehicle weight, a higher ride position means *softer* springing (because there is more air volume and the same pressure); however, those convoluted style bags don't act as ideal air springs at all because the rubber resists both stretching for suspension extension and collapsing for suspension compression. This is why good air springs are of the rolling lobe (a.k.a. reversible sleeve) type. RideTech offers both the double convoluted air springs like these, plus reversible sleeve and a variation of reversible sleeve which is tapered to change the spring rate progression, in both versions that mount over dampers and versions that mount separately.

@4:06 A properly designed 5-link is not over-constrained - it is ideal. Just count degrees of freedom: there are 3 translational and 3 rotational degrees of freedom, and the suspension needs to move in one degree (controlled by the spring and damper), so the remaining 5 degrees must be controlled. All of the links of a 5-link locate in only one dimension (they are under compression or tension only, not bending) except the spring link (for designs like this that mount the spring and damper to a control arm instead of directly to the hub carrier), so if ball joints are used there is no binding. The bushing deflection occurs because they are not ball joints, and not perfectly parallel to the instantaneous axis of rotation of each link end. The bending load mentioned in the construction of the adjustable link exists only because the bushings on the ends are not ball joints.

I’m currently in the middle of building a HomeKit controller for my unpowered sky light blinds. Project is about a month in now, I went from DC motor, to steppers, to now using a DIY servo motor. The code is getting insane and I haven’t even gotten to the PID parts. I should have just spent $300 on an OTS assembly but at this point I’m too far down the rabbit hole to quit and I’m learning a lot in the process.

"The perfect is the enemy of the good enough." That's the essence of engineering.

All hail the algorithm! Seriously, love your show and your humor style. It makes your videos enjoyable to watch. Seriously, thank you for not starting your videos with a scream.

It brings peace to my heart knowing that I'm not alone with lots of ongoing and unfinished projects... Also, good enough™ just made my day. Thank you Matt!

Your narration is poetry 😍

I was binge watching the series instead of doing my german revision, guess i have to do that now, or i could watch something else of yours, i love your content

3:14 I missed the appearance from future Matt but I guess I'll take the Good Enough™

If you're welding sleeves into/onto tubing you should drill holes around the perimeter for plug welds. Or if you want to keep it in the jaguar spirit you could use rosette welds.

No such thing as poor break over angle with enough speed

Thank you for bringing back the old outro :)

Ah yes, the gargaflargs. Always wondered about those.

Sunday morning + iced coffee + Superfastmatt new release video = wife, leave me alone for 10:59 minutes!

Thanks for always putting a smile on my face. All hail the algorithm. 😁🍻👌

Definitely one of the best Podcast of the entire KZfaq Channels. I buy a t-shirt Good Enough... why.. Because it is ... good enough.

Matt’s level of skill makes his good enough pretty darn good. Constantly impressed with the difficulty level of the projects he’s willing to tackle.

I love this Jaaag project so much

Matt; I would have bet money that you would have gone with the self-leveling Citroen Hydro Pneumatic suspension. But then there is Future Matt that will do that.

Another great video! I like the way you narrate the story and the decision making process. Much more informative and interesting than watching other "build" channels that just bolt together free parts from sponsors and never experience a setback. A project is never a linear path and it's kind of reassuring to watch someone change directions during a projects the way the rest of us do. ("All hail the algorithm!")

this channel is one of the best on youtube. . You deserve 1.68 milion subs, not 0.168

Very impressed. You have the ability to engineer solutions and the temperament, objectivity and dry wit to document the process! Oh, forgot to mention your excellent taste in both the selection of drivetrain and powertrain. Thanks for taking the time to document your hard work.

Best automotive KZfaq channel out there. Easy to understand and Matt is easy on the eyes too. So it's a win win.

Your honesty on projects does me good

I would love to see a project using the junkyard pneumatic valve. Adjustable height work tables?

Many factory air suspensions, like that on my 2001 Audi allroad, have a lower spring perch that is kind of pear shaped (as are many things on a 22 year old car), so the spring gets stiffer as the suspension gets lower. In the rear, they also have dampers that are adjusted by an air valve so the damping adjusts as the suspension adjusts.

AHTA. That's what I love about your videos Matt, they're always Good Enough.

Great video Matt! Your Jag is awesome. All of your projects are super interesting. It is amazing to see all that you do.

You speak so well. It's so satisfying.

Goodenough is one of the greatest engineers of the modern era :-D

The dry sarcasm and resignation in the intro feels like a particularly endearing personal attack. 😅

Can you make a quick vid where you compare aerodynamic drag at different ride heights at highway speed to determine power consumption and affect on range? Nice system

Matt, I’ve been watching you since the beginning… of the dry sump video, and I gotta say, you’re must watch KZfaq.

I recently was designing an air ride system for a project...didn't know anything about how to do it. Spent days and day designing circuits electrical and air, and trying to source individual bits and bobs Ended up using a set of used oem bags and struts and purchasing a new aftermarket controller and valve bank. NOTHING rides like air! Love the channel SFM! 😃

This channel keeps me from staying anymore projects. Thank you for your service

am I the only person that wants an "All hail the Algorithm" T-shirt? (with UK shipping)

Top tip: for comfort use a fridge kompressor - super low noise, won't last 20 years without lubricant, but it will be fine. But perhaps leave the noisy one in for speed. 🧐🤔🤓

One of my favorite builds!!!

I love your channel, the humor and nerd level is supherb. Love from Germany

I made a very similar 2 wheeled skateboard!! I love it! With my steering system design I needed a steering dampener to get rid of random speed wobbles

@SuperfastMatt I just discovered your channel, lots of great stuff! I believe what you said about air suspension at :55 is backwards; to raise the car you need more air volume, not pressure (the weight doesn't change). A greater volume of air has lower spring rate than a smaller volume.

I'm building some active aerodynamics and I was thinking of using some air shocks, this is going to help me out alot. Thank you!

Matt, I saw your Death Valley - Road Closed video, and thought that was pretty cool. I'm not sure what convinced me to start your Jag EV swap... but I have become a HUGE fan! As a civil I get your sense of humor and have really enjoyed all the videos in the Jag series. Anyway, love your stuff and I'm really looking forward to watching more of your videos. Right now you're still under 250k subscribers, which for me is cool because you're going to hit it big and someday I'll say, "I knew Matt when he was just a quarter mill!"

Nice work and explanation. Look up plug welds for your contrl arm tubing. Add a lot of strength

You don't make Videos, you make art

Loving the content, keep up the good work!

It is amazing how sometimes the OTS is just what you needed. I have come to that conclusion when considering EFI for my MGB.

Top notch. Love these vids. They tickle every single happiness nerve in my brain 🧠

10:50 ohh... Gold...

I liked this video. but didn't share since most of my friends won't understand Matt's humor. Good Enough™.

I love watching a DIY video about buying stuff. All hail the good enough! 🥰👍🏻

You can change the characteristics of a air spring by reducing the volume with a liquid such as a silicone oil. All telescopic motorcycle forks are coil/air spring hybrids ,whether they are pressurised or operate at ambient pressure. Changing the oil level alters the air space above the oil and therefore changes the air spring characteristics.

Another excellent video, this channel is so underrated. Tall your friends about this fun corner of the Internet!

as usual a fine Video with many insights

For the same reasons (hard in high, soft in low) I have opted to use a lift kit from Stanceparts. Wonderful stuff, really cool!

"Good Enough" SFM Merch coming soon? love the work!

Good Enough is the best kind of good

Love the videos, now we just need the "Good Enough tm" t-shirts!

It often comes down to the standard formula: Money vs Time (+ skill).

Creating the DIY air suspenstion system was like almost every software project I've been involved with. People with way too much talent and skill excited to DIY a solution. Which is awesome if it was a stand-alone side project, but not in the middle of a big production system that noone will know how it works in 3 years.

All hail algo! Need more 4runner!

Love the Jag videos. All hail the algorithm !!!

Thanks Matt, usually enjoy your videos but this one was Good Enough.

Good Enough Matt, good enough. 👏🏻

i designed my own airride, and i did it the right way. You dont use pressure EVER as rideheight setting. Its completely ret*rded. The reason you talked about in the video, the lower the car the lower the pressure. But then someone gets in, or you load up the back of the car with stuff and now all of a sudden the pressure rises because the bags have to carry more weight. Want to guess what the air suspension is going to do? Its going to lower the car even more in the back even tho it was allready getting lower because of the weight you added there. So instead of the car going level again when the air suspension activates it wil actually lean back even more. So the only way to go is to include height sensors. Height sensors and pressure sensors would be best if the system looks at both and trys to get the pressure left to right equal at all times. If you use that you should prettymuch have the same corner weight on each wheel.

The best kind of good. Good enough.

Love your work 👍

Solid work

I watch all of your vids and i’m not even a car guy, they are just interesting and entertaining 👍

Best of the best as always 🙂😌

Man, you are one smart dude!

That heatshrink labeling really is the bomb. Algorithmic comments FTW too.

Always a thumbs-up. Great vids

Isn't the pressure the same regardless of ride height? You have the same mass at each corner, so the force on each airbag is the same, so the pressure is the same. Unless the airbag shape or suspension geometry changes. You just have more air in the bag at higher ride height which makes it longer. Which would also make it ride softer because you need more travel to halve the volume and double the force. Or am I missing something??

Nice job...Thanks for sharing....

I am in the process of swapping out the rear coils on my Discovery 2 and installing the factory air bags. I have all the bits, just got to install them.

There is another solution to the ride height adjustability problem, hydropneumatic suspension uses a cylinder and piston filled with hydraulic fluid at each corner to sort of act as a spring. The cylinders are attached by high pressure hoses and hardlines to a nitrogen filled sphere (which is attached to the car's chassis) which acts as a compressible springing medium. Further more, there is a hydraulic system with a pump and valves which adds or removes hydraulic fluid from each corner to change the ride height and keep the suspension level. This system, introduced by Citroen for the DS was also used by Mercedes for its hign end cars, most notably the 300SEL 6.3 and later 450SEL 6.9. It was considered miraculous at the time but the system's complexity made it something of a maintenance hog. This may not be a problem for a high end Mercedes, but was a thorn in the side of many less than wealthy Citroen owners. Over time, these systems lost favor with manufacturers. Air suspension may have its faults, but it can be good enough for most purposes. Hydropneumatic suspension is a fun system to re

I had air springs on my 36 foot dual rear axle 8 wheel motorhome. The driven rears were ride height adjusted. There was no controller, just the ride height valve. The fronts had a fixed pressure that I checked before each trip, and the tag axle had a pressure gauge and mechanical pressure release valve on the dashboard. Again, no controller. I could deal with the ride height problem (rear tow hitch) with the dashboard adjuster. By the way, the fronts make a big noise when they blew out when I hit a big bump. Also, I found you can pay someone $600 to take the front suspension apart to replace one or you can find someone who knows that if you roll them up and put soap on them you can have them installed for $30 the second time you blow one out. I also found that I could do it myself with the soap method once I watched the guy do it so third time was a charm. I don't think you will blow them out as my motorhome was 12,000 pounds so much higher loads. It was only the fronts that blew out and they were inside coil springs so not a huge deal. I often wondered what would happen if the rear bags went but never found out.

I love this JAG .nice job😀

Very cool... my head exploded at 8:25. Brillaint.

I believe the technical term you're looking for is "shock condom."

How about making a barrel nut for the one bolt that you have to cut off every time?

That rear multilink has very specific bushes that bind in weird ways to provide passive steering effort depending on where the wheel is throughout it's travel. I hate modifying cars with multilinks because changing things even very minorly can throw the whole thing off.

Hail, hale, Skipper.

This was golden :)

You got me good with the compressor joke, jump cut ;)

Great meeting you today. Got distracted by the Elan, but it was cool seeing the Jag looking fairly normal , though it looked better “aired out” as the kids say haha

“SuperSmartMatt” should be your channel’s name.

Now we just need to see the interior finished

The internal spring pressure is the same at all ride heights. Resistance, like loading the vehicle will increase the internal spring pressure. Here is a question for you. Does your Jag get heavier at the full height of a lift on a hoist? I know it does not. Adding more cubic air to an air spring will cause it to extend until it meets resistance, only then will the internal pressure start to rise to meet or exceed the resistant load.

Wow. All hail the Matt.

Awesome! I... think I'd like to have air-ride on my mini-truck... maybe, perhaps...

Super good enough!

@SuperFastMatt when you get tired of car projects you should tackle some basic DIY home projects... like electric opening doors using the guts of a Model S door controller.

Ready to order a good enough tm tee shirt! No pressure… or not enough, or too much… or just right

Neat, thanks.

My Dad taught me the phrase "Good enough for whose gettin it. We ain't building a church." That helped me along most of my life until one day I found myself on a construction project...at a church. When it occurred to me I looked up with a smile. He was right!

cool video great job proud of you