Roll over angle of a 74?

This site may earn a commission from merchant affiliate
links, including eBay, Amazon, Skimlinks, and others.

nickw

nickw

Joined
Jul 26, 2005
Threads
86
Messages
1,357
Location
Cranbrook BC
Was thinking about this the other night.
Just wondering what the roll over angle on my 74 would be?

I was thinking I would be safe until about 35' or so.
Depends on speed and what not as well.

I start to get nervous now around 15' and by 20' I'm not liking it at all.
I never used to mind until I rolled. :)
I know it depends on the rig, and every rig is different.
I am sure the 74 would roll before the 80 did (80 was real steep. 45'?)
But I am just wondering what a average safe angle would be on a 70 like mine.

Cheers,
N.
 
Last edited:
Here is the pic. The one tire got about 1ft deep in the water. (less in the pic).
The pic below is about 10 degrees. Got to about 15' degrees total.
I know the picture below is wimpy, but it got me thinking.

If the truck slipped to the deepest spot, it would of been about 2ft of camber or about 25'.
I wonder how it would of done? I am sure it would be fine (allthough I would of been uncomfortable now).
But it begs the question. What are they safe to in real world driving.
creek_road_2.jpg
 
Last edited:
Monash University in Melbourne with help from the Victorian Police have done extensive research into 4wd accidents.
They say the 75 series troopy ,which would be close to a 74 in height and centre of gravity is 38.9 dgrees and the 105 series is 42.2.
That is tested on a tilt table
http://www.monash.edu.au/muarc/reports/muarc184.pdf
 
I just found the same link and was writing a reply when I saw Rosco beat me to it! I also found a reference that the 100GXD was 45 degrees and the new 70 series pickup was 42 degrees. I suspect your truck Nick might be slightly less due to the lift and taller tires than stock, but I doubt it would be much different. You could probably find out by testing it yourself in your workshop rigging some safety equipment up to make it safe. But it might not be worth the risk.
 
Martin White said:
I just found the same link and was writing a reply when I saw Rosco beat me to it! I also found a reference that the 100GXD was 45 degrees and the new 70 series pickup was 42 degrees. I suspect your truck Nick might be slightly less due to the lift and taller tires than stock, but I doubt it would be much different. You could probably find out by testing it yourself in your workshop rigging some safety equipment up to make it safe. But it might not be worth the risk.
Click to expand...

Have to agree here my new 70 series feels a lot more stable than the old 75, being new i spose it should. I am sure the wider track at the front makes a big difference.
I tipped my 75 over quite badly ( driver error getting over a slip) but thankfully the tray ended up leaning againest a tree stump which stopped the truck before it went over. Very lucky. Hauled it back to earth with a load binder.
My experiance is that every truck is different, and due to different ground conditions it can be OK one minute and disaster the next. Listen to your gut feelings, if you have done a bit of off roading they are pretty well right. If you have any doubt avoid that line or get your spade out and modify the track. It does not take long to improve most tippy bits.
 
Last edited:
realisticly, it depends on the driver and the situation/terrain. i have had the 70 series well past 45 degrees with no issues. if you do not have a controled driving skill then i would stay well below that.
there is a HUGE difference between a tilt table and real life.

book knowledge sucks <well in my world it does>
 
oh and one little bit of advice
ALWAYS turn into a roll, don't panic...that just makes matters worse. and if you are on a steep hill then head for the nearest tree, better to replace the front end than be taken to the morgue...

cheers
 
Thank guys. I know it depends on driver and terrain (and speed).
I learnt alot from my last roll. And If I knew then what I know now, I would still have my 80.
The part about turning down hill and hitting the throttle (thanks wayne).
I had tried to drive off exactly how I went up.

I will call 25-30' my max, and feel safe about it. I really don't need or want to go further. The only exception would be when you have a narrow road with close side banks. You know the ones where you can't roll because the side with catch you. We had a buddies zuk to around 50 degree's with me hanging of the other side keeping it down, and him driving. We got out. :) But it's always different when its not your truck. :)

I took a punch of pics and started drawing lines crossing the center of gravity on my truck. If I am right (best case scenario etc) I would be good for up to 47' on drives side, and 40 on passenger (with only me driving). But I don't want to test that. :)

Cheers,
N.

The main reason I am doing this thread is so I can feel safe around 25' again.
You get off caber alot when wheeling (even on old roads, not rock crawling or anything (I'm not a crawler).
I am just tired of getting the sick-in-my-stomach feel, and want to know I will be fine.
 
Last edited:
Here is a pic of my 80 when I rolled it.
When I winched it back over, it got put in almost the excact place it was before it rolled. Assuming this pic is perfectly square (it wont be, it will be plus or minus a few degrees) I measure the roll angle of my 80. It was about 52 degrees. That awesome considering I had my canoe on the roof, as well as gear in the back the slid to the wrong side. Makes 40' feel like nothing. :)

18.jpg
 
crushers said:
realisticly, it depends on the driver and the situation/terrain. i have had the 70 series well past 45 degrees with no issues. if you do not have a controled driving skill then i would stay well below that.
there is a HUGE difference between a tilt table and real life.

book knowledge sucks <well in my world it does>
Click to expand...

I wonder how your (modified?) trucks are able to outperform a bone stock 75 series troopie by well past 6 degrees. Did you mean that real life allows you to exceed that of a tilt table? Perhaps troopies are that much more top heavy.
 
crushers said:
realisticly, it depends on the driver and the situation/terrain. i have had the 70 series well past 45 degrees with no issues. if you do not have a controled driving skill then i would stay well below that.
there is a HUGE difference between a tilt table and real life.

book knowledge sucks <well in my world it does>
Click to expand...

The tilt table is the only way to compare vehicles. Obviously out on the trail things like soil ,tyre type and pressure all come into play.

I would have thought you could go further under the controlled conditions of a tilt table,than out on the trail;)
I get a cold sweat at about 30 something degrees:D
 
lowenbrau said:
I wonder how your (modified?) trucks are able to outperform a bone stock 75 series troopie by well past 6 degrees. Did you mean that real life allows you to exceed that of a tilt table? Perhaps troopies are that much more top heavy.
Click to expand...

i don't know...bigger balls and smaller brain??!!

does the tilt table actually read where the troopie tips or with a safety margin? i am not sure but when the flor mats fall off the floor then you have gone too far... isn't that what the RMLCA agreed on??
 
roscoFJ73 said:
The tilt table is the only way to compare vehicles. Obviously out on the trail things like soil ,tyre type and pressure all come into play.

I would have thought you could go further under the controlled conditions of a tilt table,than out on the trail;)
I get a cold sweat at about 30 something degrees:D
Click to expand...

hummm, i guess since i have never laid a vehicle on it's side the cold sweat factor has not been initiated yet... not that i have not come close.

i was playing "sidehill" creeping along a gully with one set of tires on the bank and the other on the ground REAL SLOW. suddenly i got this gut feeling i might have gone too far, turned into the roll and the top tires conected with mother earth again...i guess i should have figured out what angle that was...
 
roscoFJ73 said:
The tilt table is the only way to compare vehicles. Obviously out on the trail things like soil ,tyre type and pressure all come into play.

I would have thought you could go further under the controlled conditions of a tilt table,than out on the trail;)
I get a cold sweat at about 30 something degrees:D
Click to expand...

crushers said:
i don't know...bigger balls and smaller brain??!!

does the tilt table actually read where the troopie tips or with a safety margin? i am not sure but when the flor mats fall off the floor then you have gone too far... isn't that what the RMLCA agreed on??
Click to expand...

Tilt tables have the vehicle chained loosely so the actual point of rollover can be ascertained.
If you click on my earlier link there is a pic of a test being done.
I believe it is mandatory here as well as the high speed lane changing testat the owners expense if you wish to go beyond the lift limits or you have a dispute with the lic authority:D

This is where Zoltan is heading:D
 
You must log in or register to reply here.

Share this page

Back
Top Bottom