1engineer
Moderator
That's not what you said lol.
Rollover angle
- Thread starter delloro
- Start date
That's not what you said lol.
Ron4RNevada
New member
I did some "inclining" tests on my '04 LR Discovery years ago. Jacking up the frame on one side with a heavy duty scale under the jack. Once the frame scale reads below about 200 pounds I measured the angle.
It turned out to be about 40 degrees. That was the truck sitting on level concrete and not moving. Add in a loose surface and movement the truck would be unstable at much less than 40 degrees.
I used to carry and inclinometer on the dash and limit my off-camber driving to about 25 to 30m degrees. Believe me: anything more than 25 degrees gets quite pucker.
On the 4Runner I generally keep it much more sane.
The Discovery actually has a lower center of gravity than the 4Runner -> a much heavier frame, solid axles both ends, lots of steel down low where the 4Runner is plastic, lots of aluminum up top where the 4Runner is steel.
First rule of thumb - If it feels like you are going to roll over - don't go any further - You still have some safety factor - YOUR BUTT GAGE is accurate.
It turned out to be about 40 degrees. That was the truck sitting on level concrete and not moving. Add in a loose surface and movement the truck would be unstable at much less than 40 degrees.
I used to carry and inclinometer on the dash and limit my off-camber driving to about 25 to 30m degrees. Believe me: anything more than 25 degrees gets quite pucker.
On the 4Runner I generally keep it much more sane.
The Discovery actually has a lower center of gravity than the 4Runner -> a much heavier frame, solid axles both ends, lots of steel down low where the 4Runner is plastic, lots of aluminum up top where the 4Runner is steel.
First rule of thumb - If it feels like you are going to roll over - don't go any further - You still have some safety factor - YOUR BUTT GAGE is accurate.
carlomagne
New member
Do you have your phone mounted to your dash anywhere? Trying to look for one on amazon without reviews stating that the magnet will mess with the phone one way one way or another.
Here's a pic of my cousin. We had a buddy with us that went about 6 inches further on the passenger side to avoid the wall and his passenger rear wheel was in the air. His 4runner wanted to kiss the wall so a few of us had to get on his passenger side sliders to keep it down. He did have long travel rears so that might have been the reason.
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LawnDart
Senior Member
I have it in the RAM mount that uses my front cup holder as the base.
Ron4RNevada
New member
Measuring your picture; that truck is leaning 23.5 degrees.
carlomagne
New member
Wow and at 23.5, it felt pretty intense. I can't imagine 40+
Ike64
New member
Sounds like something a helicopter pilot would be worried about
In helicopters it's called dynamic roll over and you need three things for it to occur. A roiling motion (moving to quickly across a slope and hitting a bump), a pivot point (you are a truck you have 4 pivot points), and exceeding the critical angle (basically when your CG reaches a point where it's unrecoverable and the roll continues). Unlike a helicopter I don't see you recovering from exceeding the 4Runners "critical angle" where ever it may be.
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jwkilgore
New member
It may be only 23.5° side angle, but the pic looks like you are also at a considerable downhill angle. Sidehill and downhill at the same time would multiply the pucker factor.
ray:
Jhalko
New member
This is 50* Not gonna happen in a 4runner in any orientation.
Looks like a ski run I took last weekend, I mean it FELT like that, it was only single black so it was likely half that. Haha.
I like these threads, it reminds me that I'll never flip my truck cuz I'm such a chicken I won't get to half the angles folks are talking about.
LawnDart
Senior Member
This is 50* Not gonna happen in a 4runner in any orientation.
It's already been established there's a difference between the angle of your tires, and the angle of the actual cab as it responds to the incline.
oljedi11950
New member
You got ALL the cool shite [MENTION=103267]Saker[/MENTION] !!!!:vader:
LawnDart
Senior Member
I suppose if you wanted to be safe about it, using a vehicle with sliders or something structural, using a crane and safety lines just in case it tips, to avoid damage. It'd be an interested set of experiments for sure.
1engineer
Moderator
Naw, just attach a come along or a chain with a turnbuckle to a tree and the frame. Just have to be careful.
scanny
Senior Member
I have an inclinometer in my truck and I can tell you that 15 degrees side angle makes you feel like you might roll if you're not careful. It's from inside truck. From outside it looks like slight incline - nothing to worry about. At 20 degrees you don't feel like getting out of the truck or let passenger to get out, because it feels like truck might roll over if you sneeze. Maybe I'm overly sensitive to off-camber but that's how it feels to me : ) I never tried bigger angles but I think realistically stock T4R evenly loaded without heavy load on roof can handle 30-35 degrees on hard surface, but I don't want test it on my truck : )
carlomagne
New member
It may be only 23.5° side angle, but the pic looks like you are also at a considerable downhill angle. Sidehill and downhill at the same time would multiply the pucker factor.
Oh it was definitely at a downhill angle. I slipped a bunch of times trying to get up/down the hill to spot haha.
