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Boomslang Suspension Suss
United States
Приєднався 17 сер 2009
The science behind our grown-up toys.
RC Crawler Suspension and Design.
And sometimes Mountain Bikes.
#AvantLink
RC Crawler Suspension and Design.
And sometimes Mountain Bikes.
#AvantLink
Why are all RC Shocks the Same: An Intro to Tiny Shock Architecture
Before diving into shock tuning it's great to understand WHY RC shocks are built the way the are. This video will give beginners and experts alike a detailed look at the design of RC shocks. Why are they so simple? How do they work?
00:00 Intro
01:40 What does a shock do?
02:46 The Outside
03:57 The Best Designs are Simple
04:40 The Inside
074:31 Bob Fox
08:20 The Seal Stack
11:25 Bent Axles
12:26 Shaft Coatings
12:28 Alternative Designs
14:07 Outro
#rccrawl #rccrawling #shocktuning #shockabsorber #shockabsorbers #rc #rcoffroad #shocktuning
00:00 Intro
01:40 What does a shock do?
02:46 The Outside
03:57 The Best Designs are Simple
04:40 The Inside
074:31 Bob Fox
08:20 The Seal Stack
11:25 Bent Axles
12:26 Shaft Coatings
12:28 Alternative Designs
14:07 Outro
#rccrawl #rccrawling #shocktuning #shockabsorber #shockabsorbers #rc #rcoffroad #shocktuning
Переглядів: 1 811
Відео
Shock Orientation - Up or Down?
Переглядів 1,8 тис.14 днів тому
Which direction should you mount a shock - fat or skinny side up? PLUS - leak proof shock building technique. 00:00 Intro 00:20 The Great Debate 01:07 Clearance 02:22 Unsprung Weight 03:48 Center of Gravity 07:04 Oil Leaks 08:09 O-Rings 09:17 Best Assembly Method 12:06 Air Bubbles 13:20 Oil on Both Sides 14:33 What Did We Learn? I ONLY post links to tools I own and purchased with my own money. ...
One Foot Bat Hang - Extreme RC Crawling
Переглядів 36221 день тому
More extreme bat-style RC Crawler descents. 00:00 Intro 03:15 Fails #rccrawling #rcextreme4x4offroad #rccar #rccrawling
Next Level Weight Hanger
Переглядів 2,3 тис.21 день тому
Here is an RC Crawler weight hanger that improves upon the Dlux Loaded Dice concept by being more compatible with standard wheels. 00:00 Intro 00:29 The Concept 07:17 The Build 10:34 The Numbers 13:24 Field Test 16:25 Outro #rccrawling #rccar #rccrawl #rccrawlers #tungsten Dlux Fabrications dluxfab.com/ Wheels crawlerinnovations.com/parts-accessories/6-bolts-1-50-1/ dluxfab.com/Crawler-Innovati...
Drilling Hack - Tech Tip #7
Переглядів 22428 днів тому
These free Trex Decking samples from any hardware store make GREAT, disposable, soft backing plates for drilling against. #rccrawling #drilling #drillingoperations #rccar #rccrawl #rccar
Preload v. Spring Rate
Переглядів 93128 днів тому
Here you will learn the difference between Preload and Spring Rate on RC Cars and how to tune specifically for RC Crawlers. 00:00 Intro 00:20 Spring Theory 04:20 Spring Rate 06:30 Preload 10:37 Advanced Tuning 12:48 Corner Weight 13:42 How to Adjust Preload 14:14 RC Crawlers 14:52 How to Tune for Full Droop 17:08 Climbing 19:36 What Did We Learn? #RC #rccrawling #rccar #rccrawl #rcextreme4x4off...
Random Rock, Windy Tempe
Переглядів 452Місяць тому
Just a rock on the side of the road near Papago Park. I could spend hours doing this. What a dumb hobby. But so satisfying. 00:00 Successes 01:24 Fails
INTERVIEW SERIES - Matt Beest of Dlux Fab
Переглядів 712Місяць тому
Find out about the inner workings of Dlux Fab and random chatter about competition, concerts and crazy cool crawler parts. GUEST: Matt Beest - driver, builder, technical genius 00:00 Intro 01:26 How Many Products? 03:28 Where did you start in RC? 08:05 Dlux History 13:04 It's about The People 13:44 New Products 14:50 Start of Crawlers 15:35 The State of Competition 17:05 Super Class 19:42 Oil W...
Can you have TOO much Articulation?
Переглядів 2,2 тис.Місяць тому
How to dial in the right amount of Articulation on your RC Crawler. Don't get stuck in a chasm. Float above and live! 00:00 Intro 00:18 Definitions 00:47 Too Much 01:26 Just Right 01:48 On the Bench 03:06 Binding 04:24 On the Rocks 05:21 What Did We Learn
Rear Steer Demo
Переглядів 3292 місяці тому
This demo shows how a little rear steer can make a big difference. The rear wheels work against the front wheels and generate traction. Also, the rear wheels can find their own preferred line to climb.
Best Battery for Axial SXC24 Crawler - Gens Ace
Переглядів 2672 місяці тому
I like this Gens Ace battery - it's got a better shape, lower center of gravity CG CoG and very reliable. Also some great hack tips for taking good care of your battery. Lipo 450mah 2S 24C I only recommend products that I own, have tested, and bought with my own money. Here are links to everything in the video and Amazon shares a commission, so stick it to the man and support the independent cr...
Portals & Twist - Part 2
Переглядів 1 тис.2 місяці тому
Here I revisit the topic of Torque Twist and Portal Axles on RC Crawlers. 00:00 00:39 Review 02:22 Axle 03:28 Myth One 05:04 Myth Two 05:21 Demo 06:52 Demo with Brakes 08:12 Slo Mo 09:22 Other Resources Werewolf werewolftech.com/en 74 Weld motorsports.74weld.com/ #rccrawling #rccrawl #rc #rccar #rc4wd #torquetwist #rccrawler #rccrawlers #rcextreme4x4offroad
What's Up with my RC Crawler Today?
Переглядів 4 тис.2 місяці тому
What's Up with my RC Crawler Today?
Latest Custom Parts Unboxing - RC Crawler
Переглядів 4292 місяці тому
Latest Custom Parts Unboxing - RC Crawler
Get the BEST Response from your Steering Servo & Linkage
Переглядів 2,4 тис.2 місяці тому
Get the BEST Response from your Steering Servo & Linkage
Trim v. Sub-Trim - Do you know the difference?
Переглядів 6012 місяці тому
Trim v. Sub-Trim - Do you know the difference?
Crawling near the beautiful Orange California Poppies.
Переглядів 1922 місяці тому
Crawling near the beautiful Orange California Poppies.
Advanced Tuning with Shock Angle - Part 3: PROGRESSION
Переглядів 1,4 тис.2 місяці тому
Advanced Tuning with Shock Angle - Part 3: PROGRESSION
Tripod Fail - Right when I cleared this crux move!
Переглядів 2113 місяці тому
Tripod Fail - Right when I cleared this crux move!
A different kind of electric car with no driver inside.
Переглядів 1193 місяці тому
A different kind of electric car with no driver inside.
Tuning with Shock Angle - Part 1: SIMPLE Version
Переглядів 2,4 тис.3 місяці тому
Tuning with Shock Angle - Part 1: SIMPLE Version
The Struggle Was Real - from utter failure to so smooth.
Переглядів 2303 місяці тому
The Struggle Was Real - from utter failure to so smooth.
Tuning with Shock Angle - Part 2: DETAILED Version
Переглядів 15 тис.3 місяці тому
Tuning with Shock Angle - Part 2: DETAILED Version
Diabo Steep Progression #rc #rccrawler #rcextreme #rcextreme4x4offroad #deathdrop #practice
Переглядів 2403 місяці тому
Diabo Steep Progression #rc #rccrawler #rcextreme #rcextreme4x4offroad #deathdrop #practice
Brilliant !👍
Many thanks for this nice presentation. I'm designing my first 1/10 shafty rock crawler and i'm looking for infos & inspiration. I find that here. I strongly brainstorm about the knuckle weights. On a 1.9" wheel, is it possible to make them hanging low inside special 3D printed rims, where should stand the inner part of the foam ?
The closest thing is a Dlux Loaded Dice but it only come in 2.2 as far as I know. I've heard of a few people working on the concept you are describing but nothing has come to fruition yet. One challenge is being able to get the wheel off if weights are recessed into it, so keep that in mind.
I've been working on this concept. ua-cam.com/video/-rps27jtqgQ/v-deo.html
@@BoomslangSuss Thank you for your answer. I've thought i could put the hanger inside the wheel, bolt the wheel on the hub, then screw the hanger on the knuckle. Tricky challenge, but the CG may fall down a lot if success....
@@BoomslangSuss Amazing job !👍Pro level ! Congratulation.
I knew your channel would be a big help to people when you first started it I knew it thank you
Thanks! More on the way.
Great LCG crawler! I also want to make it someday Thailand.
Very cool. And helpful even for my humble SCX24s.
Glad to hear it!
What about smaller like SCX24, recently i read somebody said they are just another pair of links. So no need for all those considerations about oil. Oil Dampers only very recently have been used, the Injora 39 or 40 mm oil shocks seem to have become a standard.
I have a couple SCX24s. It's pretty tough to get oil to seal, and the friction in those seals would pretty much over power the oil damping force, so personally I run no oil and super light springs. Sometimes no springs. A good friction shock design (like using multiple o-rings - more or less to increase or decrease damping friction) would be a smarter approach for cars that small, but no one is going that path yet that I know of.
Great video I really enjoyed it so I will subscribe
Laying the shock down will make the suspensions LESS progressive, as more lay down shock will get even more lay down when suspension compress, hense has less force, less progressive.
I follow your rational but you’re looking at it backwards. Progression is determined by the shock angle to the swing arm (not the chassis) and the shock moves toward 90deg (or less laid down) as the suspension compresses. More progressive as the shock compresses because the angle to the swing arm changes far more rapidly than the angle to the chassis.
I’m not an engineer by any means but I would definitely think putting your rear upper links higher so now when you have the weight transfer or pivoting on a certain rear corner on steep incline would create a higher leverage point, acting as a taller pivot point so the weight will push against the mounting location vs wanting to roll over said pivot point/mounting locations
You have to look at the complete force balance of the whole system and you can’t just isolate one link or one pivot location. Plus if you’re talking anti-squat that’s a dynamic response and has zero bearing on slow moving vehicles. Hopefully you saw my first video that should explain it better. I am working on a non-reading version of this video coming up soon ha ha.
ua-cam.com/video/-ad04wUd8PQ/v-deo.htmlsi=3fKBykBGSvhtouCW
@@BoomslangSussthank you that makes perfect sense
Another well done, informative production!
You are too kind. Any topics you would be interested in?
great videos... can I buy a set or buy your cad file?
Yes and yes. I’m working on a plan. Stay tuned.
@@BoomslangSuss I'd also be interested in the cad file to maybe make it work for the F10 vanquish axles and standard 1.9 wheels!
Nice 👍🏾🔥
Tips : If you own a Gmade GS02 or GS02F scale crawler, you can use Traxxas 8262 rebuild kit by installing traxxas o-ring instead OEM Gmade SD shocks o-ring
Good to know. Thanks for sharing.
Great, informative video!
Thank you!
👍👍👍
Well ..link risers stopped my crawler from hopping, while climbing steep hills.
Good video once again. Thermal expansion is why emulsion shocks are built ”dead” i.e. the shaft doesn’t come out on its own from full compression. Any pressure (above ambient) inside the shock will ramp up quickly when you drive an off-road car around the track at high-speeds. Same thing with the diffs: an amount of air is left inside on purpose to allow oil expansion. Failure to do this will cause the oil to push on the outdrives and lock the cross pins on the inside. The seal could blow, too.
Thanks for the education!
You bet! Hope you found it useful.
like for the alkaline trio shirt :)
Thanks!
thank you for the video. I really like your drawings, most RC channels never make their own drawings... I have sth to add to the shock debate: ua-cam.com/users/shortsE3KMpwZfxZs?si=nTrU032QaduD6cOI 😆
@@Nic-bd6bj 🤣🤣🤣🤣🤣
@@Nic-bd6bj Thanks for the comment! 🙏 I work hard on the diagrams so that they are super simple and clear. (it’s harder to make something simple 😂)
Awesome tutorial. Nice video 👍🏾🔥
Thank you! 🙏
Great video. I definitively feel better prepared to go deeper into shocks now. Looking forward to your next video!
Much appreciated! I’ve got a lot more in store.
I didn’t learn anything today but watched the whole thing regardless, this is a brilliant series of videos for anyone new to the hobby or just wants a refresher. Looking forward to the next one 😃🤙
I’ll try harder next time! Thanks for the nice words.
You said that I’d learn something. That Bob Fox fact was one that I honestly never knew.
Alkaline Trio. Going to have to check them out. 👍
Solid punk rock.
Right up my alley then.🤙
@@BoomslangSuss haven't heard that name in a long time. Need to go back and relisten again
We're do yo get the hangers ??
Still working on a plan to sell them.
Hi did you decide to sell these yet ?? ?
Yes I’m working it. I’m not really in the business of stocking, shipping and selling parts so trying to find an easy way to do it. Dlux might be on board.
Awsome Video...i Like your Channel...Great Rig...Greetings from Germany...
Thanks! Hello to Germany.
Thanks for making me think :) (not just this video, all of them)
I sincerely appreciate that! Thank you.
Are you ever gonna do a “What’s up with my crawler” for you Scx24?
Yeah that’s a good idea.
@@BoomslangSuss I’d definitely watch it if you do one.
ua-cam.com/video/B636Ze8DULs/v-deo.htmlsi=DxPhIFhlkto8WS3N&t=110 on this animation there is contact on all sides of the o-ring, i'd think that would be because you don't want the o-ring in a reciprocating application to "roll" around.
That animation is not to scale and not meant to be interpreted literally. If an o-ring rolls you've got bigger issues - it would take a lot of friction for that to happen.
I’m sure you said that last line waiting for someone like me to mention the “Emulsion” shock build that is commonly used in rc racing. I believe they are purposely built with air bubbles in them. Looking forward to hearing your thoughts 😃
Ha ha, yes - thanks! I know emulsion shocks are used in buggy racing and it seems to be a love or hate it type of situation. I'm not sure if I'd consider RC a "true" emulsion shock because most of the air is being bled out, trying to keep air bubbles to a minimum. In other industries, there is more air and the oil is designed to foam up and the performance is designed around a foamy oil. The consistency (or lack of) is a function of the amount of foam, internal pressure (if they are pressurized) and temperature. Bladder and IFP shocks are way more common outside of RC and emulsion is considered low end. RC shocks are so simple though that it makes for a compelling case.
racetech.com/g3s-shock-types/
@@BoomslangSuss so me coming to say I have air bubbles in my shocks is good then? 😂
@@TimsRcsurgery 🤣If you are deliberately setting it up emulsion style with a bleed cap and no bladder....sure!🤣🤣
@@BoomslangSuss😂 yep, I’ve tried both, and prefer emulsion with the MIP bypass pistons, often bumpy loose tracks here. I thoroughly enjoy your videos, thanks for the reply, keep up the great work, look forward to the next one 😃
I assume all the shocks you weighed had oil in them?
Yes, they had oil. These are typical Crawler shocks with only a 10mm bore. And these particular Dravtech shocks have a relatively heavy spring cup on the piston side. I may do a follow up with 12, 13 and 16mm bores that are more common on faster moving vehicles and I suspect the C.G. results will be more pronounced. Though I would still recommend piston side down for lower unsprung weight.
We’re big fans of emulsion shocks on the off-road buggy racing side of things. It used to be all bladder shocks in the ’90s but these days I don’t think anyone runs a bladder in 1:10. The folks with 1:8 buggies consider it a tuning option and can build the shock either way to affect handling. The key to successfully run an emulsion shock is to have a strict method to bleeding them. We push the piston all the way in with the bleed screw open and then close it. Virtually zero bubbles inside at this point. Pulling the piston out lowers the pressure and tiny bubbles appear in the fluid. I bet you have seen bubbles appear into brake fluid seemingly from nowhere when bleeding MTB brakes. This way, the amount of air inside the emulsion shock is controlled and repeatable, and the bubbles are mixed with the fluid so thoroughly that the damping effect is uniform through the whole stroke. They’re the bees knees in our discipline.
That is interesting. I think I don't quite understand how you guys are setting them up. Seems like you have a minimum amount of air inside. My experience with bicycle and motorcycle forks - they run big open baths that are more air than oil. It's cheap but only somewhat effective. Seems like you are doing it better.
I would imagine that the volume of those shocks changes more when the piston slides in and out. That would require more air. On these shocks, it’s just a 3 mm shaft going in and out about an inch or less. Pulling the shaft out doesn’t cause a strong vacuum inside.
Thanks again for a clear and informative video. I assemble shocks exactly as you demonstrate. Pushing a steel rod with a machined shoulder through O-rings or X-rings just feels awful. While not an optimal solution, I sometimes shim some squeeze into the seal package. O-rings can swell or wear just a little and it can be tricky to get the fit just right. If I find the seal to be too loose to my liking, I add something like a 0.2 mm shim to the stack and it most often prevents leaks while allowing the shaft to move with relatively little friction. I drive the fast kind of RC cars and weighed my rear shocks using a similar method to yours. A 13 mm bore shock with a 27.5 mm stroke (as used on 1:10 buggies) weighs 17.9 grams and it’s distributed as 10.74 g for the top and 7.16 g for the bottom. When sagged to ride height, the center of mass is 30 mm from the top and 45 mm from the bottom. Since the shock is placed at a 55-degree angle, the change in CoG is reduced. However, the center of mass of the shock is still lowered by 12.3 mm on the vertical axis when it’s flipped. So, unless my grasp of the physics at hand is flawed, flipping the rear shocks means that 35.8 g of mass is lowered by 12.3 mm from a position that was relatively high to begin with. On a car that goes really fast through corners on a high-grip surface, this can be a pretty good argument for flipping the shocks. This is not to say everyone should do it. It depends. But the top drivers in Europe (Cragg, Kaerup, Hall bros…) have been winning high-level races with their shocks flipped so we know for sure it’s not a bad setup option to have.
The numbers I present are just a single case example. The shock weight and sagged length will vary for sure, as well as the exact angle. But the principle is there.
It looks like you are getting 35.8 as the weight of 2 shocks. You are not lowering the full mass of the shock by 12 mm, unless you are moving the upper and lower mounting points as well. You are only shifting the CG with the endpoints still at the same location. By these numbers you have 60-40 weight distribution, so that is a the weight delta (10.74 - 7.16= 3.6g) shifting 20% of the shock length, which you said is 12.3 at 55 deg. So its 7.2g (2 shocks) total lowered 12mm, not 35.8. This makes sense because 13mm bore shocks will have a bigger delta than the skinny 10mm shock I measured.
I must have wrongly assumed that I could pin the entire mass of the shock to the center of mass, but now that you brought it up this doesn’t make sense.
Not a ton of articulation is good. Also, you don’t necessarily need that every time if you have too much articulation, your tires will fall in a hole and then your tire will bind so yes and no for crawlers.
ua-cam.com/video/BvoXOOFaMdQ/v-deo.html
💯💯
I agree it is not anti squat but I think it more for torque twist it just the same part used
Link riser have even less of an effect on torque twist. If you are thinking about roll center, that is also a dynamic response to fast cornering.
@BoomslangSuss it look to not lift the front wheel as much with higher anti squat
The guys at Vanquish Products built shocks last week on their live, they built them the same way you showed.
That’s hilarious! Happy to see someone else teaching the right way finally. 🤣 Thanks for sharing.
I also spend most of my life mid stroke or deeper.. 😬 2 things. Good pliers make ALL the difference when putting those rings in the bottom of Dravs. There’s also a grease that is for motorcycle chains? I think? It is green slime in bulk. It’s green, slimy, looks and smells the same and is WAYYY cheaper. I’ll try to reply when I get home. I can’t remember its name right now.
Probably not the same. Very different applications and you definitely need something that is o-ring compatible. Not sure it’s worth saving a buck here but let me know how it works.
Noleen SF-3
@@BullmanBuiltRC That'll do it! I might try Slick Honey - it's very common on bicycle shocks.
Rock city parking lot, yeah definitely more wheel speed for that decent... or some rear weight. I usually give it the beans towards the end. Or if the car I'm using has it, I use the dig all the way down
Glad someone else said what I knew. I got into a very heated argument about shocks and CG. I was a hydraulics master in school when I studied for heavy equipment maintenance. I know for a fact shocks all leak. If it’s leaking badly to where you need to rebuild very often, you either didn’t build them correctly or you nicked the shaft enough to cause the o-ring, the thing that helps keep the oil inside, to fail prematurely. I see this so often on the drift group I moderate and they’ll tell people all kinds of nonsense. Whenever I hear someone is having shock oil leaking, 99% of the time the chassis is coated in dirt and grime. Leaking shocks are the result of poor maintenance and poor building. There are some shocks that really do have poor tolerances but for the most part, at least for drift, they’re all variations of a theme and are dimensionally the same or similar so that excuse is kind of moot. As for whether you run them upside down or not is a matter of preference. Also, the technique you’ve shown was the exact way that I’d learned and really does produce a very nice shock that doesn’t at all leak. Tamiya told me to build it a certain way and was always wondering why my old shocks leaked and needed rebuilding so often. I recently built a set of TRF shocks using that same technique and they’re the most buttery and leak-free shocks around.
I love that. Thanks for sharing your story and insight.
Freakin OUTSTANDING!
Get your life together and come back. 😂 🍻
Selling Stl file for the chassi cut? Looks darn good :)
Thank you. It’s very specific to my skid, but we could work something out if you want me to design a blank skid for you or if you do your own skids.
is this a sporty?
I doubt it. I’m not really targeting any specific class, I’m testing technology.
Great video 😃
Thank you kindly!
thank you for the video.I like your channel. On my mountainbike the rear shock is mounted vertically and can be installed both ways. I ride the fat side on the top and the skinny side on the bottom mainly so dirt has no chance to build up due to gravity. In your experience, does the orientation of mountainbike shocks matter? Thanks, Nic
Air shock or coil shock?
@@BoomslangSuss air shock (rock shox rt3)
It doesn’t really matter. The fat side of an air shock is the air spring so it’s mostly air inside, and the weight is pretty balanced. Your dirt build up reason is a good one.
So who is responsible for the car when it hits and kills someone, because my understanding is everything is preprogramed for how the car should reacted in different situations, so if it kills someone is it premeditated murder? I just watched a video of one going against the flow of traffic in a construction zone in Arizona, police got the car stopped and luckily no one was hurt but they had no idea what to do once it was stopped. Amazing technology but a lot to consider from a legal standpoint.
All fair questions. “Supposedly” they are safer than human drivers, but will certainly never be perfect. One of many merging legal fields for sure.
Thanks!
Thank you my friend!!!
You rep some of the best bands around with your shirts. Great videos I am making major tuning changes on my comp rigs.
Rock on!