Find the Center of Gravity of your rig the easy way!

Рет қаралды 12,963

6 ай бұрын

We all talk about Center of Gravity but do you know how to actually find it? This video walks you thru how to find this info with a very basic and simple method. All you need is a string and a camera.
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@ShoddyRC 6 ай бұрын

I’ve been wondering how to do this. Thank you!

@HarleyDesignsInc 6 ай бұрын

Happy to help!

@jonathanfletcher97 6 ай бұрын

“We all know what it is, but do you actually know how to find it?” For a split second I forgot this was an RC video 😭

@HarleyDesignsInc 6 ай бұрын

Unfortunately I won't be very helpful with any other sort of videos! :)

@SeanWhitrock-nn2ei 6 ай бұрын

Got your attention didn’t he? Lol

@PowerhouseOffroad 6 ай бұрын

Hop on that vfd conversion....you'll be a God amongst men. My CJ is waiting, my VFD is waiting and the WORLD is waiting!!!!!

@kevinhill2929 6 ай бұрын

Great idea Josh. I have stuck a three gear and vanquish hurts dig in mine but yet to make sure body still fits but the VFD is even a better idea. Let us all know what u come up with. Thanks

@ChindrisHoratiu 6 ай бұрын

its not a better ideea, u should go with a outrunner combo and a dlux trans or a Grind trans from ProCrawler ... fhe vfd ain't sh**

@JamesInSpace914 5 ай бұрын

Nice to have this properly explained for once, great video, thanks, Josh!

@blakedenley3792 6 ай бұрын

I swapped a vfd into my 10.3 gladiator. Made a world of difference

@adammtber5199 6 ай бұрын

Great information. Never thought of it doing it that way.

@AnyAssumptionBanter 6 ай бұрын

Wish this would be part of everyone's reviews. I see soany people just blindly adding weight and doing the same thing on every single truck they get and not taking into account actual physics. Great vid.

@HobbyEntropy 6 ай бұрын

This gave me flashbacks of my vehicle dynamics class in college! 😂

@clintdyson5765 6 ай бұрын

Yes please follow-up with this.

@Jellybean_191 6 ай бұрын

That was the simplest way I have seen to find the COG. Thanks, always get great info from you.

@keldonator 6 ай бұрын

I'd guess 2. We'll I was wrong, thanks for sharing this information.

@jdsrcs8061 6 ай бұрын

Great demonstration Harley!!! I just picked my CJ7 today. This will help with mods!!! Thanks man!!!!🤘🤘🤘

@redndeyes 6 ай бұрын

His real name is Matt 😂

@jdsrcs8061 6 ай бұрын

@@redndeyes 🤣🤣🤣 I know but I always call him Harley or that dude with the beard

@StubbsRC 6 ай бұрын

Stubby revolver and am32 esc. Fixed the motor problem!

@HarleyDesignsInc 6 ай бұрын

That definitely would help, but it's still weight up high, relocating everything and combining the efforts will make it even better.

@ericbaker2030 6 ай бұрын

I am really looking forward to watching this build series!

@JeepinMaxx 6 ай бұрын

On my full size Jeep TJ it would be #2 because of the engine location. On the Axial I'd say #3

@dustinalexander982 6 ай бұрын

I would definitely be interested in seeing the vfd transmission swap it be cool if that's easy enough to do id love to do that as well love the cj but agree with ur statement with motor being so high.

@billderas3420 6 ай бұрын

Great video Josh. Given me a lot of information to apply to my six crawlers. Thanks!

@davidhiscock1969 6 ай бұрын

Thanks for helping us find the G spot Josh 😂😂😂. Nice video fella 👍

@cardboardcrawlersrc8805 6 ай бұрын

What a great little lesson. Thanks for sharing this little bit of knowledge with us. 🙏👍.

@nicolaemates 6 ай бұрын

Awesome and easy. You Joshed this one. Now I can't wait to check the COG on all my trucks. Thank you.

@outcastrc8052 6 ай бұрын

Excellent teaching tool Josh! Thanks for taking the time to demonstrate this concept and provide clear instruction on how to improve our RC experience!

@jimmccabe801 6 ай бұрын

Thanks for another great video. Good information.

@jimkrug2586 6 ай бұрын

So simple and very helpful. Thanks. 👍

@jasonsrcstuff9278 6 ай бұрын

Great knowledge and information.

@GeorgiaBoyRC 6 ай бұрын

Interested to see what you do to this truck. I got mine a few days before Christmas. I'm probably gonna try some of your mods! Love the technical info. Keep it up!

@Livlifetaistdeth 6 ай бұрын

That was actually very helpful thank you.

@GrimSpeedFPV 6 ай бұрын

I would love to see the video when you install the vfd in! Definitely think I want to do that to my early bronco!!

@ectosports 6 ай бұрын

So good. It's interesting to thing about where the CoG lands and always hard to figure out from rig to rig. And then to think about un-sprung weight and its effects on the CoG and performance.

@silentjde 6 ай бұрын

I moved the stock shocks down to the links mounts and wider wheels and it’s a much more stable truck just doing that. Very interested in seeing what you do, I really like this rig.

@bonesworld7178 6 ай бұрын

Awesome vid Josh...will tune in

@jerryvolpini7987 6 ай бұрын

Quick, easy method! Not exact but then, close enough. Thanks! 👍

@brianmassey7563 6 ай бұрын

COG is not what I thought you were talking about based on the intro... Nice vid...never thought of that method before.

@justinomarino 6 ай бұрын

Good idea on the video. It would make a good series.

@allscalerc 6 ай бұрын

Thanks, I definitely learned something new!

@RC.Time-Crawlers 6 ай бұрын

It's always great to hear from Josh. I'm hoping to see you create a 3D dash and print something for that back seat area. Outside of those 2 visual issues, that vehicle is extremely impressive when scene in person, especially in that color. Takecare !

@westdesertwheeler2666 6 ай бұрын

Guess I’ll be dangling my trucks with strings for the next 3 hours

@meirdeaph 6 ай бұрын

😂😂❤

@meirdeaph 6 ай бұрын

Awesome stuff

@bazzani21 6 ай бұрын

Great video Josh

@TexasBoy-nq8dr 6 ай бұрын

Ok this helps lot and I understand the concept lot better definitely need to do this to my scx24

@2superblus 6 ай бұрын

Very well done video

@nicholasstephey8475 6 ай бұрын

Definitely quick and easy

@bbeckers24 6 ай бұрын

Great video. Probably would have been to expand and show knowing where that point is will allow you to see when you vehicle is about to roll over.

@saturnfivehynrgrc581 6 ай бұрын

Like button engaged man, good stuff.

@sussexmicrorc 6 ай бұрын

Great video description, been trying to thing of a desk top rig to put small scale race cars and truck on for a while that would be able to do the same sort of thing, some sort of adjustable pendulum style thing is what im thinking but haven't got it figured in my head yet.

@brandonchayka4009 6 ай бұрын

I’ve wanted to swap a Vfd twin into my gladiator ever since I put the OD servo on my Phoenix. I love being able to trail it to the crawl spot and then flip that OD on and watch it work on some hard lines.

@fredhenschel3000 6 ай бұрын

Great video !!! I’ll be checking all mine just to see if there is a correlation between center of gravity and fun factor… I just trail run… no hills or rocks to craw here

@gibsonlife573 5 ай бұрын

Very cool stuff

@rcstories_ca 6 ай бұрын

Very cool method of finding the COG. I have corner scales and use the Longacre Racing trigonometry method of finding COG. If you take one more photo with a string attached to a corner of the bumper you could also see the left right balance point. I would say this string method is good for ballpark estimates as having the shocks fully extended is going to severely throw off the COG.

@HarleyDesignsInc 6 ай бұрын

Absolutely it does. But any method of bench testing will have dynamics that aren’t accurate during running so it still gives you one of the most easily repeatable tests.

@rcstories_ca 6 ай бұрын

@@HarleyDesignsInc Totally agree. Driving is the real proof. I have just been surprised myself by how much small changes to suspension setup can affect weight shifts.

@Stinkles_ 6 ай бұрын

Interesting! I’ve done CG plenty of times on RC Planes and Helis, but never considered how it would be done on a car. Well, time to find out the CG of every single car I have haha

@HarleyDesignsInc 6 ай бұрын

I'd like to hear how you prefer to do it on planes, something I've never done except in video games :)

@Stinkles_ 6 ай бұрын

⁠@@HarleyDesignsInc Well usually the ideal C of G range is specified by the manufacturer, measured aft of the leading edge of the wing. I usually balance the plane on my finger tips, or rig up a stand, and move the battery around until it sits level on the cg mark.

@thomasreynolds4455 6 ай бұрын

Would you look at that. It's just like full size trucks where we use cam or crankshaft as rough estimate for COG height. For anyone looking to get more precise, the KevinWilsonSBC videos are awesome.

@HarleyDesignsInc 6 ай бұрын

He does make some good tech videos. However I wouldn’t say his method would be more accurate for RC. For RC we have the benefit of being able to do things much easier ways that take a lot of outside factors out of the equation.

@thomasreynolds4455 6 ай бұрын

@@HarleyDesignsInc oh its for sure more accurate. Seeing as how it's the SAE method used by plenty of engineers, chassis builders and tuners. If that additional accuracy has any use for RC, probably not.

@meirdeaph 6 ай бұрын

This is gonna be good 👍

@Darwin.B 6 ай бұрын

Idea to make this easier. Hang a long second sting behind the hanging rc and line the strings up for the pic. So you have a reference line on either side.

@smashtj666 6 ай бұрын

Thanks josh.....

@SivartCustomRCs 6 ай бұрын

I love that CJ, sadly I can't do an RTR, monetarily it makes no sense to me. I will wait for the body to be sold separately and then build it my way.

@austnsauce2543 6 ай бұрын

Wow informative and entertaining? Starting 2024 off strong!

@fejwe 6 ай бұрын

Guessing it's 1. Womp womp! This is a super cool trick, never heard of it.

@braddahdussifyoumuss596 6 ай бұрын

The cog has gota be 1 😂 this is how I find my cog on my rigs and works pretty well🤙🏽

@chubn1 6 ай бұрын

RC4WD for the win

@Justin_Newman 6 ай бұрын

I’m going to say it’s going to be 1 or 4 I’m leaning more towards 4 but I’m not sure where the battery sits on these but I’ll go with #4 for COG

@fernsolo 6 ай бұрын

👍👍

@meirdeaph 6 ай бұрын

👍💪🤸‍♀️🤺🧨💯

@onereed333 6 ай бұрын

I likey!!!

@gbresaleking 6 ай бұрын

3 is my guess

@shuster1921 6 ай бұрын

Now I know how to find the center of gravity, kind of,,, Do you know how to find the center of the underneath of your truck? Drop a Wrench😉

@MangoJim90 6 ай бұрын

Making the guess: it is in the middle of the our planet👍 Your cap Personally I don't care about COG of my rigs. The only thing I did with one of them is playing with weight bias (front/rear).

@DadsRCGaragePNW 6 ай бұрын

what fun things are you cooking for this beast? I snagged one same color and now I'm wanting to make it my own. It Definity preforms better then the early bronco did out of the box. the torque twist is less.

@HarleyDesignsInc 6 ай бұрын

My plan is to do a transmission swap, new wheels, tires, possibly axles, and all the electronics. So it will be a very different truck in the end I'd say.

@DadsRCGaragePNW 6 ай бұрын

@@HarleyDesignsInc make it times 2 cause ill need parts hahaha cant wait to see what ya cook up. I took it out to my spot today and was surprised it did as well as it did. I feel some heavier wheels will help but the tires werent to bad.

@trashypantsyota 6 ай бұрын

The LCG groups on Facebook will tell you you're wrong. 😂

@Mike_and_Life 6 ай бұрын

Besos, Musk, Branson... all spending hundreds of millions to get to space. Here I am, convinced Josh could get us there on a weekend with a gift card from injora and rc4wd.

@Hobz79 6 ай бұрын

curious what the benefit of having the pinion/spur being on the opposite side of the motor in the VFD transmission. As far as I can tell, VP are the only ones doing this, and it can result in difficulties with motor fitment.

@joshtoth2541 6 ай бұрын

by adding the battery pack to the side doesn't that now throw off the weight balance side to side?

@Andy_C_aka_Cliff_McCrawl 6 ай бұрын

Anybody make a brass battery cover plate? Looking to lower the cg on my DX3 transmitter! 😂

@bigjeep_littlejeep3777 6 ай бұрын

Did you try any truck in 3/4 points and see if it’s close?

@RadRaf 6 ай бұрын

only 4:14 in and my guess is 4!

@theworry184 6 ай бұрын

@troypostie1252 6 ай бұрын

My Dad never told me where it was. It just guessed😂

@ChindrisHoratiu 6 ай бұрын

Man you need to have a light truck and with the Vq transmission that weights a lot u cant get that. Its for no use a 4 kg truck with low cg vs a 2 kg truck with low cg

@nicholasstephey8475 6 ай бұрын

@HRDNTS 6 ай бұрын

Simple but useful info! I wonder - if you wanted to see where the balance was left to right and front to rear, could you hang it from the end of each wheel and look at it from the bottom, then draw the lines and see where they intersect front to rear and left to right?

@HarleyDesignsInc 6 ай бұрын

Yes thats exactly correct. Its the same method but in a different plane.

@Alexauscelle 6 ай бұрын

Fix your suspensions in drive-position with some tape. This will help to find the real COG

@HarleyDesignsInc 6 ай бұрын

Absolutely would find a more at rest location, although that changes constantly while driving as well so a pinpoint COG is only for reference.

@Alexauscelle 6 ай бұрын

That's for real. Good point of view.

@buysncharge 6 ай бұрын

This sounds like learning nerd!

@kjflyte5088 6 ай бұрын

Anything is better than that axial transmission.. so changing is a win-win, but why wasre time on an axial? Lmbo jj

@mrchucklesssss 6 ай бұрын

Would a titanium roll cage weigh less than the plastic?

@HarleyDesignsInc 6 ай бұрын

Density of nylon is around 1.2 g/cm^3 vs the titanium which is around 4.6 g/cm^3. So Titanium would be 3-4 times heavier. Granted, you could try to use less material but in the end you would likely be quite a bit heavier.

@gbresaleking 6 ай бұрын

Do they make a hollow titanium tube? Maybe that would also cut down on weight if building cage out of hollow tubing

@HarleyDesignsInc 6 ай бұрын

Thats not been something I have been able to find. I have looked for it for sure, although I bet 3/16 titanium tubing would be wild expensive!

@mrchucklesssss 6 ай бұрын

The rollbar from the TWS VTG80 , has me thinking it would be right about the same if not less, (if in titanium). weight wise due to the amount of material that would not be used compared to the current cage. But then again, sizing of the rods might just make it the same amount... i'm thinking that i'd rather have the simple cage than the Genright style and am now im just trying to justify making a titanium cage for myself without going 4x overweight ! @@HarleyDesignsInc

@offroad1911 6 ай бұрын

I thought you were gonna talk about something else us guys are always trying to find. 😅

@Thatguys9773 6 ай бұрын

gonna say 4

@johngookinsable 6 ай бұрын

I think I failed math lol

@Chico-jm8sl 2 ай бұрын

Kinda defeats the purpose to spend over $5 hun plus on an Axial to tear a perfectly good 2 speed/dig transmission out of it to install a $150 dollars or more for a Vanquish transmission and files. So you gain a lil lower weight but then you lose all that up front weight over the wheels the way Axial designed it. considering the Vanquish motor is nearly a motor length behind where the axial motor sits. The Axial motor sits nearly over the front wheels, the Vanquish tranny puts the motor nearly behind the front wheels. Just not so sure the trade-off is worth the time and $$.if you want a Vanquish just buy one, if you want an Axial buy it.why destroy a perfectly good design for no real gain. To me it's a trail crawler not a comp rig. Install shorter axial shocks w/ 65wt oil and add brass down low is all it needs.

@thekeytoairpower 6 ай бұрын

first

@thescooterist235 6 ай бұрын

no one cares

@meirdeaph 6 ай бұрын

I kinda do im like 50ith I lost count if I were in the first 5 or 6 at least then I'd be good 👍

@NTX_RC 6 ай бұрын

Good info, but kinda feels like a Vanquish commercial, lol

@HarleyDesignsInc 6 ай бұрын

The VFD trans is a better design in terms of COG, and it's what is in most of my trucks because of it. I just want this great looking truck to perform as well as my others!

@NTX_RC 6 ай бұрын

@@HarleyDesignsInc fair enough

@ja_co_bus650 6 ай бұрын

Thats an axis of gravity, use the Z axis to determine the centre point. A third line will determine the Z axis.

@HarleyDesignsInc 6 ай бұрын

That’s why I specified it’s in one plane.

@alphamale1568 6 ай бұрын

I don't buy it. - at least there's more to it than that. Weight locations are a big part of the center of gravity, which is why people remove mass from up high and add it down low with brass.

@HarleyDesignsInc 6 ай бұрын

And any change made, will effect the COG and will be reflected in this test. This is just a simple method of finding exactly where the COG of an item is.

@rcstories_ca 6 ай бұрын

This test IS measuring the weight balance. Instead of using a fulcrum (think teeter-totter) it is measuring how mass twists around the anchor point of the string. It’s a bit like a boat sitting in water. Shift a weight left or right, forward or backward, and the boat will tilt different directions with the water line indicating the balance plane. Make any weight changes to a truck (e.g., adding brass to the front axle) and the lines projected by the string will change to indicate the new COG location. In Josh’s photos, half of the mass is always to the left of the string and half is always right of the string. The point where the lines theoretically intersect is the COG.