Rear wheel drive can be dangerous

Posted on May 19th, 2007 in Handling,Opinion,Suspension by Julian Edgar

108569_7mg.jpgI think this (apparently uniquely Australian) idea that big family cars need to be rear wheel drive is simply rubbish. You hear it all the time – rear wheel drive is best for towing, rear wheel drive is best for handling, rear wheel drive is somehow hugely superior over front wheel drive. Well, apparently it is for the macho Australian male, anyway.

From the day I first bought a car I have never been a believer in the philosophy; in the time since I’ve owned rear wheel drive, four wheel drive and front wheel drive cars – and I have remained unconvinced. In fact, if anything, I think I am leaning heavily in the direction that rear wheel drive, without traction control (or better still, stability control) is potentially bloody dangerous.

Today is a perfect example. I’d bought a big workbench on eBay – and this morning I had to go pick it up. The thing is enormous – much too big to fit on my normal 6 x 4 trailer. So I organised the hire of a car carrying trailer. When the alarm went off at 5.45 am (pick-up was set for 8 am) I awoke, listened for a moment, and then my heart sank.

It was raining.

I needed to go down the narrow, tortuous road from the mountain on which I live, pick up the huge trailer, then drive straight back up the mountain, descending the other side on an even tighter, narrower road. All in Frank the EF Falcon, a car which even without a trailer hooked on the back, power oversteers around these wet and slippery corners even when you’re trying to drive gently. Perhaps it’s the tyres – and the rears are certainly down in tread although still quite legal – or perhaps it’s the sheer torque and throttle response of the 5-speed manual Falc. But either way, it’s a car that in the wet needs to be treated with an incredibly judicious right foot. Even when you’re not towing a huge trailer with a 300kg workbench strapped to it.

Going the wrong way in the ride/handling compromise

Posted on March 10th, 2007 in Handling,Opinion,Suspension by Julian Edgar

Click for larger image There are a few ways of regarding the comments I am about to write. One perspective is that they’re the ramblings of an old, out of touch man who prefers comfort to handling. Another is that I am stuck in the past, ignoring the advances that are self-evident – well, to all but apparently me.

But I think that most car manufacturers are on the wrong track with their current ride/handling compromise.

Having a car that handles competently is important. No one wants to see people spear off the road when they make a minor error; no one wants to see new cars being sold that squeal and wail and wallow their way around corners. But the opposite extreme – cars that are built to handle road conditions and driving behaviour that nearly all will simply never see – is almost as silly. Why? Well, every time you’re in a car, you’re being subjected to its ride – whether that’s good, bad or awful. And while it may be possible to produce cars that both handle and ride well, in the vast majority of production cars, better handling means a worse ride.

Race and road car suspensions

Posted on July 30th, 2006 in Handling,Opinion,Suspension by Julian Edgar

I don’t claim to be well versed in race car driving, although I’ve driven a production race car for a few laps of a circuit and I’ve driven road cars on skidpans and race tracks and at manufacturers’ proving grounds.

Conversely, I have driven probably about half a million kilometres on roads. Like you probably also have, I’ve driven on smooth freeways, on rutted dirt, on gravel and patched bitumen, and roads with corners and roads with straights. Roads with hills; roads that are flat. Roads with lots of traffic; roads with none. Roads that are easy; roads that throw corners and dips at you with startling, frightening suddenness.

And I know that the most common attribute of roads is their inconsistency. Not only do roads suddenly change as you progress along them, but the same road can have an utterly different character if the weather or traffic change.

The times that I have been on racetracks have shown me one thing: their variability is simply vastly less than roads. Yes, there can be changes in weather and traffic, but you don’t usually need to be wary of cars coming the other way, cars that might cross the centreline, for example. You don’t need to wonder where the next corner goes and – after one lap – you don’t need to worry if the surface has deteriorated overnight, or an errant truck has sprinkled gravel or diesel across your path.

And roads have bumps, lots of bumps. You need only watch racing cars on street circuits to see how smooth the tracks they drive on usually are. Even the groomed-for-racing street circuit looks bumpy when being traversed by racing cars; a road car barely notices.