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denverpilot

denverpilot

Tied Down
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Nov 8, 2009
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Denver, CO
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DenverPilot
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KAPA
Glad we've got 'em!

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Hoo-Ah!
 
My favorite: at 1:52. Gate is open, opening is 3 times the width of the car, car winds up on its roof. :dunno:

I guess there's some basis in reality for all those Hollywood rollovers... :D
 
apparently it's easier to roll a car than I would have believed, based not only on the above, but the fact that I hear traffic reports around Denver reporting "rollover accident on ..." way too often, to which I usually respond (to no one in particular) "YGBSM!!!! It's stinkin' CAVU out there!"
 
gkainz said:
apparently it's easier to roll a car than I would have believed, based not only on the above, but the fact that I hear traffic reports around Denver reporting "rollover accident on ..." way too often, to which I usually respond (to no one in particular) "YGBSM!!!! It's stinkin' CAVU out there!"
Click to expand...

Maybe they lost an engine and got below Vmc and applied full power to correct?
 
gkainz said:
apparently it's easier to roll a car than I would have believed, based not only on the above, but the fact that I hear traffic reports around Denver reporting "rollover accident on ..." way too often, to which I usually respond (to no one in particular) "YGBSM!!!! It's stinkin' CAVU out there!"
Click to expand...

IMO: No driver training is the primary cause. Long suspension travel SUV's are secondary though a major contributing factor.
The typical brainless untrained driver yanks the wheel hard over. The vehicle changes direction and compresses the suspension on the outboard side of the turn and unloads the inside suspension. Now they're off course so they yank the wheel hard over the other way to stay on the road. Then it rolls completely the other direction compressing the unloaded suspension plus the compressed suspension recoils shoving that side up in the air while the major force direction vector is underneath the vehicle pointing the other way. After that it's caster wheels on the roof time.
I deliberately and cautiously played around with the concept on my jeep just to see how it reacts in an emergency. Conclusion: If you have to yank the wheel to change course you just have to stay off course for that extra second or so until the suspension stabilizes or get what you deserve. (And I do not at all recommend conducting that experiment in an 80's jeep grand wagoneer with leaf spring suspension all the way around - it's really springy and just wants to roll over way before you would expect would. If that ever happens in real life, I'm either just going to ram something under control or use the suspension to go over the curb and through the weeds and use 4WD and chains to get me out afterward)

I still can't figure out how the low profile car in front of me years ago did that same yank left yank right on a straight stretch of road with no turn offs at 50mph ended up on the roof. There was practically no suspension travel on that thing and it sits on the ground with a wide wheel base. In the width of two lanes it went from straight to 45deg off course to on the roof slowly rotating around a few times as it slid to a stop. It wasn't a blow out or anything and it was a clear dry flat paved road with no traffic nearby. The suspension and tires looked just fine when I looked at it. Pilot induced rollover. There is no excuse for that in the least.
 
I learned that suspension compression lesson long ago in a Jeep. If I hadn't locked the brakes with the front left tire over the very high crown of a dirt road corner in soft sand, and just drove the beast over the top of the crown into the ditch, it wouldn't have ended up on its side. :)
 
If you pre-compress the suspension gradually, and keep it compressed through the turn, it is amazing how you can better take a corner even in a Jeep.
 
Yup.

Heck, now driving with the squishy floppy suspension of the Yukon, you use that technique just to do an emergency lane change. :)

It's not a jerk, it's more of a continuous but fast major "correction" to the course of the 3500 lb beast, and then let it rebound and the shocks do their job to damp it, before attempting to go the other way. (And way too many people out there driving vehicles with dead shocks, but I digress...)

The Jeep thing was after about 28 hours without sleep. Dumb. I set up the accident chain and then was part of it.

No injuries other than pride, but I did learn that day how difficult it is to get yourself unhooked from a driver's side seat belt when the vehicle is on its right side. I can't imagine being fully inverted. Climbing back up from the passenger side to climb out of the driver's side door while holding it above your head is "interesting" too. :)
 
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