Can you roll it ?
Discussion
This might sound like a daft question, but in (I guess any) modern car, can you roll it just by turning the steering wheel very quickly left or right, or will the car just skid but stay on all 4 wheels.
I was watching an old episode of 5th Gear recently & they said in a 4x4 it will roll due to its high centre of gravity, but a car wont roll as it has a low c of g.
So if you are doing 100mph & swing the wheel suddenly left or right (to avoid an object in the road perhaps you dont see until last secons) will the car just skid, slide & not roll over?
Rump.
I was watching an old episode of 5th Gear recently & they said in a 4x4 it will roll due to its high centre of gravity, but a car wont roll as it has a low c of g.
So if you are doing 100mph & swing the wheel suddenly left or right (to avoid an object in the road perhaps you dont see until last secons) will the car just skid, slide & not roll over?
Rump.
A normal car will not roll in such circumstances, but cars with higher C of G can do. There was a lot of publicity when the Merc A class first came out, because it was shown to roll under some circumstances when doing an 'elk avoidance test', ie a rapid lane change. Mercedes evntually had to modify the design to correct this.
Just out of interest, I had the dubious pleasure of testing a Montego on an empty airfield, and I can reliably inform everyone that turning the wheel like that at 70mph does pretty much nothing at all
Paul
Just out of interest, I had the dubious pleasure of testing a Montego on an empty airfield, and I can reliably inform everyone that turning the wheel like that at 70mph does pretty much nothing at all
Paul
Biggest contribution (after years of rallying) to rolling is the wheels getting sudden grip or "digging in"... whilst sliding sideways
Something like the rim catching the tarmac if the tyres are under-inflated or my favourite going off sideways into soft soil always guaranteed a roll.
On the road sliding sideways into the kerb should do it. Would be amazed if you could manage it without some help....
Oh another good one is whilst the car is fully loaded up on one side you hit a bump on the unloaded side, often happens in forests when you're ditchhooking and there is a rock or a log hidden in the grass.
Question for you racing guys... can u roll by just hitting a kerb on the inside wheel whilst hard cornering ? seen cars up on two wheels on telly but never seen one roll
Something like the rim catching the tarmac if the tyres are under-inflated or my favourite going off sideways into soft soil always guaranteed a roll.
On the road sliding sideways into the kerb should do it. Would be amazed if you could manage it without some help....
Oh another good one is whilst the car is fully loaded up on one side you hit a bump on the unloaded side, often happens in forests when you're ditchhooking and there is a rock or a log hidden in the grass.
Question for you racing guys... can u roll by just hitting a kerb on the inside wheel whilst hard cornering ? seen cars up on two wheels on telly but never seen one roll
rumplestiltskin said:
So if you are doing 100mph & swing the wheel suddenly left or right (to avoid an object in the road perhaps you dont see until last secons) will the car just skid, slide & not roll over?
Rump.
I would expect in 99.9% of cars, all you would experience is under steer. Better still, do a Don Palmer course; part of that is a very sudden lane change at 100+ mph on a very grippy surface. You have to do a hard brake just to get the weight over the front wheels to generate enough grip for a high speed turn.
Not very wrong at all.
In fact the last 300mm of track width is the difference between making it and going off into the soft stuff. If your speed and line mean that you don't have this 300mm in reserve, then you are pushing too hard.
If you are pushing that hard and are taking grass everywhere, you will normally be asked to leave, anyway.
In fact the last 300mm of track width is the difference between making it and going off into the soft stuff. If your speed and line mean that you don't have this 300mm in reserve, then you are pushing too hard.
If you are pushing that hard and are taking grass everywhere, you will normally be asked to leave, anyway.
After having seen some of those crazy Arab videos where they cane some executive Lexus (oxymoron i know) at about 100mph and then try and do as many 360's as possible i would say that virtually impossible to roll a car without interference of kerb or soft verge, especially as these had very soft suspension and relatively high COG.
.....having said that i did have a slighlty embarrassing incident when i rolled a boxster S 3times but that had something to do with a tree and a ditch
.....having said that i did have a slighlty embarrassing incident when i rolled a boxster S 3times but that had something to do with a tree and a ditch
cuneus said:
"That car has been repaired and is for sale at an OPC, near you."
Is that a joke or are you serious? (seriously!)
i cant see the pics. its not red with distinctive stickers is it ?
theres a funny (well kinda funny) vid from adenau forst (a corner on the nurburgring) its called something like rapsody in blech, filmed in, i guess 50's, very fast right leading into very slow left/right. 1/2 the cars going round manage to flip, throwing drivers out of the window and all sorts
GarryM said:
Is that going up Avon Rise before Quarry? If it is, then even with the explanation given earlier I still can't imagine how it managed to get all over there. A good job there weren't any spectators!
Yep, Castle Combe, Avon Rise before Quarry. Driver was unhurt apart from black eye caused by air bag. He tried to pass Morgan when he shouldn't have (at a trackday)at end of straight hit rear and went through armco and fencing into area where spectators normally sit on racedays. Photographer got an amazing sequence of pics. Last pic is driver sitting on grass grinning!
roygarth said:
Is that going up Avon Rise before Quarry? If it is, then even with the explanation given earlier I still can't imagine how it managed to get all over there. A good job there weren't any spectators!
Yep, Castle Combe, Avon Rise before Quarry. Driver was unhurt apart from black eye caused by air bag. He tried to pass Morgan when he shouldn't have (at a trackday)at end of straight hit rear and went through armco and fencing into area where spectators normally sit on racedays. Photographer got an amazing sequence of pics. Last pic is driver sitting on grass grinning!
Does he post on here..?
Wonder if he got any payout from insurance co..
Gassing Station | Porsche General | Top of Page | What's New | My Stuff