What angle roll over? | Ford Explorer Forums - Serious Explorations

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What angle roll over?

rookieshooter

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Martinsburg WV
Year, Model & Trim Level
84 BII "Li'l Samson"
Has anyone heard of what angle a B2 will :roll: traversing a hill? I know there are a certain factors like body lifts, tire size, spare tire location and suspension lifts. But I would think there must be at least an angle for stock bodied and stock suspension trucks.

I would like to mechanically raise my B2 on one side by both tires and see what angle it gets a little tipsy. And also to see how this Holley carb that is supposed to handle extreme angles performs.
 



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like you said, there are just so many factors, even for stock trucks.
 






rollangle.jpg
 






Well, that answer is about as good as it gets.
 






Just make sure you don't go over any rocks on the uphill side :D :roll: but 50° is actually pretty good, and it looks like it's got a 4 or 5.5" lift on it.
 






thats also with no one in it, probably no tools, ect.
 






thats also with no one in it, probably no tools, ect.


I'm sure each one will be different with each modification made. But that is at least a benchmark. Good point about if there's no one in it. I'll be taking mine on some off camber rides during the huntig season retreving deer that arn't going to just drop on a nice forrest road :D :thumbsup:
 












The experiment: Take a 4X and connect
yank straps at one point near the top,
(front-back) center of the vehicle like the
B post. Now extend the straps in opposite
directions, perpendicular to the side of the
4X. Connect two 4Xs with winches, to the
straps, at right angles to the side of the first
4X.
You know what to do now — take in
one winch and let out the other. At some
point it will be obvious the 4X is falling in
the pulled direction. Back off a bit until
you determine the balance point, and then
measure it. Actually, the hard core are
probably rolling on the floor, because this
is the way they change tires.
With much safety and apprehension,
the photo shows the results. What surprised
me was the fact that the 4X leaned a lot
farther than expected and my right fist
approximation was relatively conservative.
What I also learned was the seat-of-thepants
feeling for my rollover point. My
APF went berserk! I was actually sliding
off the seat bottom before I would roll.
I’m not going to give you the actual number,
but it was in excess of 45°.

We repeated the experiment with Don
Gilgan’s Wrangler and the recently rolled,
Chuck Thompson 4Runner (see page 24).
They too showed greater than 45° tilt angles
and the slide-off-the-seat feeling.
We also tested my Explorer with
driver, driver and two passengers, and a
load on top in a couple of positions. I was
amazed how little these load variables affected
the CG.

These tests indicate when going very
slowly, so the dynamics (movement) of the
situation do not enter into the equation, and
under ideal conditions, it is most likely your
4X would slip sideways on a sloped dirt or
poor traction road before it would roll.

But it is obvious that 4Xs do roll, so
never underestimate dynamic effects or
what I call compound angles. Calculations,
not presented here, indicate a combination
of going down-hill and side-tilt are most
dangerous. Chuck rolled in a compound,
down-hill, side-tilt situation.
Further, picture you can drive in tight
circles at a high rate of speed and roll any
vehicle. You can also be moving on a less
than critical tilt angle, hit a bump, and roll
the vehicle. Repeating - NEVER UNDERESTIMATE
THE DYNAMIC EFFECTS
OF MOVEMENT!
The preceding is a disclaimer of a sort.
What I would like are your personal experiences
and insights about all the above to
further improve the accuracy of this information.

:salute:
 






Cool experiment. The few times that I have been in one of these situations where your up high on a hill and the driver side is downhill is a freaky feeling. Your wonder how many times this thing is going to roll before you stop :eek: . Where I live and drive is loaded with hills and mountains. Nothing like the Rockies, but still as steep as you dare.
I never have rolled over in this situation and after reading the post most likely had a lot more degrees to go. But I still would like to do the above test. Agree that on a real hill with rocks and your moving is a whole lot different then the results you get with the text.

Thanks for posting that.
 






This is at the limit. I could grab his mirror and rock him back and forth on the tipping point.

45degree-bomber.jpg
 






you know, ive always though you could get a pretty good idea if you draw an imaginary line from the outside of the one tire to the top corner of the opposite side roof. Of course, this defends on how weight is distributed and everything, but it should be pretty close. More weight on uphill side of line, your ok. more on downhill side, well... it wont be downhill for long.
 






I dunno but I can tell you I have been right to that angle a couple of times, almost going over and it was damn steep

I will be installing a cage before I find out, it's not th eflop over I worry about its the roll that comes after..
 






I dunno but I can tell you I have been right to that angle a couple of times, almost going over and it was damn steep

I will be installing a cage before I find out, it's not th eflop over I worry about its the roll that comes after..

I know that you almost had it back end going over once. Saw the pic.:eek:
 






I found out that this is pretty close.

I could feel the truck slowly rolling more and more to that side.

2007_08_06_Rennie_043.jpg


2007_08_06_Rennie_046.jpg
 












 






Now I know I need to find some guys in my area to go wheeling with. Too much can happen.
 






never wheel alone
I have been in some BAD spots when we go alone, not planning to get into anything extreme when its just us, but it happens whether you plan it or not
 



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