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About LinkBacksDont forget a cage will improove the overall rigidity of the car - Its still going to be better than no cage at all
Dont forget a cage will improove the overall rigidity of the car - Its still going to be better than no cage at all
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Porsche (and probably many other car manufacturers) use steel of different strengths for the 'cage'. There's quite a good picture to illustrate this on the following page:
http://www.porsche.com/uk/models/cay...detail/safety/
Click on the 'Passive Safety' link. That's pretty much a roll cage.
Dont know about the weight, but for drag racing its usually costed around £130 a point...which starts to get a bit expensive, but then again thats using the coorect tubing type, thickness etc etcOriginally Posted by [GSV]Trig
http://www.webster-race-engineering....abrication.htm
http://www.robinson-race-cars.co.uk/...e%20direct.htm
I think thats mainly designed to keep the passenger shell from deforming due to the lack of an engine upfront to absorb the impact, something that has been pretty successfull judging by the number of people who have walked away from serious crashes in 911s and the like.
Yes and no. Yes the CoG being high leads to the roll occuring, but had he been running road tyres when he went sideways the tyres wouldn't of dug in leading to the CoG moving. They would of let go, the car would of slid and we wouldn't have that awesome photo.You can never have too much grip
you're right - the level of friction acting on an object will decide whether it skids or rolls - the CoG is in the equation too... as the (sideways) speed increases so do the chances of rolling...Yes and no. Yes the CoG being high leads to the roll occuring, but had he been running road tyres when he went sideways the tyres wouldn't of dug in leading to the CoG moving. They would of let go, the car would of slid and we wouldn't have that awesome photo.
Only to a point. Above a certain fairly low speed the force exerted on the tyres going fully sideways stops increasing completely.
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The COG is not just "in the equation" its the key factor in deciding whether a car with a specific level of grip, slides, or roll's!!!
A lotus elise, 200sx, skyline, ferrari, aston, tvr could put sometrack day slicks on and you won't see them rolling around like a pig in mud. Why? Low CoG - a cars that are designed from the ground up to go round corners as fast as possible, wheras the clio.. well it's designed for going to the shops and back isnt it?
Butuz
Nicely put Butuz
Simon
seeing as we're looking at semantics; i didn't mention "just" in the equation - it's one of the key factors - grip (friction), CoG (or centre of mass correctly speaking) and other complicated stuff...
/waits for Lowe's reponse...
You never saw midgers off at the drifting did you ?
its the same thing. He came into a corner very sideways , very quickly then hit the kitty litter
he was about 2 degrees from rolling it ( and the entire stand had a major 5p/10p moment !)
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Yeh saw the pics
Kittly litter is not what we should be aiming for
Butuz
LOL/waits for Lowe's reponse...
No, Butuz is right - Clios are designed as shopping cars, that's half the appeal because with the hot versions they're still normal every day cars with a bit of poke too. You can't go shopping in an Elise and expect to get much home with you, nor can you flatten the rear seats and chuck in a fortnights worth of holiday baggage for you and the missus.
For a SPECIFIC amount of grip, yes CoG will be the key factor. Thats why that SX nearly rolled, the sideways grip increased probably 10 fold or more when going into the gravel, hence why it digs in. Hell an Elise or F1 car can roll if you spank it sideways into a gravel trap at speed even with their super low CoG. The trick is balancing up how much sideways grip against the CoG of the car you're driving and then making a judgement call as to whether it's too much or not.In the Clio's case, too much
The reason that racing drivers survive big crashes is the 6 point harness, racing seat, helment and HANS device. When a road car crashes, the occupants tend to get chucked about inside, the single seatbelt can't hold them well enough. A full racing seat is very restrictive but they don't fold up so they protect your spine in those really big shunts drivers tend to have.
If you look at touring cars, the drivers seat isn't in the same place it would be in the road car, in most cases its low down and further back than in the road car, its also further toward the car centre too. If you put a roll cage in the car, bear in mind that it'll cause the fire brigade no end of problems if they have to cut you out of it...
from the porsche site:
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