zukkev
Cornfuzzled yet again...
I haven't done the math, but I bet with everything taken into acct, I wouldn't be surprised if my COG dropped by nearly 3" with the changes I made...
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Why does a rig roll?
- Thread starter Binder
- Start date
TreeClimber
Well-Known Member
A rig rolls when the Center of Gravity is no longer within the vehicles width or length, as it relates to the contact points with the earth.
That of course changes with you add inertia into the mix. You can sidehill a sanddune with inertia that if you parked sidehill on it, you'd roll.
Plus, suspension characteristics can drastically shift the location of the center of gravity due to unloading/loading of the springs/shocks. That changing of the CG can not only roll you, but it can also give the vehicle an internal inertia that might carry you over.
Then there are the times when someone basically just drives until you have driven onto one's side. The trail simply turns you over.
That of course changes with you add inertia into the mix. You can sidehill a sanddune with inertia that if you parked sidehill on it, you'd roll.
Plus, suspension characteristics can drastically shift the location of the center of gravity due to unloading/loading of the springs/shocks. That changing of the CG can not only roll you, but it can also give the vehicle an internal inertia that might carry you over.
Then there are the times when someone basically just drives until you have driven onto one's side. The trail simply turns you over.
boardbysled
Tree Nerd.
You'll have to compensate for weight gained too (not talking about your rig):fawkdancesmiley:
Damn It! I posed that, then realized that my COG is probably REALLY bad if my rigs leaning to the driver side:haha:
zukkev
Cornfuzzled yet again...
So long as you sidehill with the downhill side to your pass side, your GTG!!!:;:fawkdancesmiley:
zukkev
Cornfuzzled yet again...
If the CG is fixed, it's fixed. If the suspension is moving around so is the CG...........
Not only did I not fix the trans but now the steering is jacked too.
that's OK I can outwheel you with the superduty.
:haha::haha::haha:
Wait, what happened to your steering???:yikes:
Boonie Buster
Stuck on a Curb
I did say there are many variables but I was using the physical properties of the rigs size itself as that seems to be the typical argument going...."a wider rig is more stable and safer"
a wider rig, is usually also heavier and higher....speaking full-bodied rigs, no the buggies.
Binder
Well-Known Member
I think the orbital valve is broken.......but the CG is still the same.:;
Binder
Well-Known Member
Weight doesn't matter and the overall height doesn't matter but the height of the CG does when leaning.
Boonie Buster
Stuck on a Curb
ya, that's what i was getting at, generally a fullsize will have it's COG higher.
bigiron
Stuck in the Swamp
What is this Anti-wrap bar you speak of Jeff? and what is its purpose? LMAO....I though it was all related to how big your steelies were?
03 CON
maybe its not
- Joined
- Mar 27, 2006
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If the CG is fixed, it's fixed. If the suspension is moving around so is the CG...........
Not only did I not fix the trans but now the steering is jacked too.
that's OK I can outwheel you with the superduty.
Wait!!!! Now I wanna see what is typed in white take place:corn:
mark
Well-Known Member
In the basic truth, Binder is correct. If no other actions are put toward it, one the COG surpasses the lower most edge of the rig, it will go over.
Gassing it, braking, turning the wheel has to do with either (a) moving the COG within reference to the edge or (b) changing the momentum temporarily to over-come a brief occurrence of the COG outside the edge.
All things static, once the COG goes over the edge, over she goes.
Gassing it, braking, turning the wheel has to do with either (a) moving the COG within reference to the edge or (b) changing the momentum temporarily to over-come a brief occurrence of the COG outside the edge.
All things static, once the COG goes over the edge, over she goes.
The relative gain in stabilility by increasing the track width is dependent on the ratio of the height of the CG to the track width.
Heres a link with more than you ever wanted to know
http://www.jeepaholics.com/tech/cog/
Heres a link with more than you ever wanted to know
http://www.jeepaholics.com/tech/cog/
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Damnyankee
Well-Known Member
thats petty much what happened to me.. good thing it was in canada...:haha:
but if you limit width and length then you are limiting height as you then create a very unstable rig when trying to lift the rig to get bigger tires and yet still trying to stay under the width length limits...
Broken Again
Well-Known Member
Wow that brings back some memories....
Made me think of Pokeys(different Pokey...this guy is my friend Bud Boren) Attitude Adjustments.
http://www.jeepaholics.com/attitude/attitude.htm
NotSoPC
Well-Known Member
The COG is a very big part in it. All the rest will change from trail to trail or roll to roll. In a normal home built trail rig the COG will not change other then the weight of passengers and gear. The rest will change depending on what you are doing.
If you have a rig (Sammy) with stock axles then step up to yotas with the same backspace then the rig will be more stable. The COG will be lower do to the weight of the new axles, and the contact patch being moved outword will let it lean more before rolling.:awesomework:
If you have a rig (Sammy) with stock axles then step up to yotas with the same backspace then the rig will be more stable. The COG will be lower do to the weight of the new axles, and the contact patch being moved outword will let it lean more before rolling.:awesomework:
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Money Mark
Well-Known Member
- Joined
- May 19, 2006
- Messages
- 563
Well, come on CrazyDaze Corey......you seem to have plastered your opinion all over the board in the past on this subject. Lets here your counter argument. This thread is obviously related to your opinion and being out spoken about it.
"Wider is more stable" is correct thinking.......with a piece of wood. Not with a vehicle.
"Wider is more stable" is correct thinking.......with a piece of wood. Not with a vehicle.
Money Mark
Well-Known Member
- Joined
- May 19, 2006
- Messages
- 563
And that's the Y factor........"Y wouldcha needs onea dem.":redneck:
