Thread: Interesting but....

I had an episode when I first got BlackBetty,one or 2 took me to task on it,but it scared the hell out of me.
Travelling to Perth in the rain,barely legal tyres,actually going up to get new ones fitted towing a trailer.
Uphill reasonably sharp bend cruise set @110ks.Hit the water running down the tracks roadtrains have created in Albany hwy.Traction control lights on on she didnt want to follow the bend at all,like wanted to go straight ahead!!!!,touched the brake pedal,cruise off normality returned.I dont use cruise in the wet no more,too dangerous.
Andrew

Anyone whos car begins to hydroplane and has not yet touched either the brake and or clutch which will disengage the "auto pilot" deserves to crash.

Come on, lets not legislate for stupidity!

Originally Posted by Studio54

Anyone whos car begins to hydroplane and has not yet touched either the brake and or clutch which will disengage the "auto pilot" deserves to crash.

Come on, lets not legislate for stupidity!

Too late. We've got some of the stupidest legislators on the planet.

As for people who think they need help from a computer to drive a car?
Hand your Frigging liscense in.

Shorty.

I have heard of this happening to livestock trucks, the story goes that the after travelling up a decent sized hill in the rain the cattle all move to the back of the truck and create a load shift, the front wheels lift and lose traction, thus sending the Cruise into accelerate mode and the aquaplane effect happens, this is usually followed by a horrific accident with lots of bullcr@p everywhere



Bit like this story actually

In my head (as twisted as that my be). Unless your wheels slow down when you begin to aquaplane the car shouldn't accellerate. Since I'm sure the resistance of the road surface would be greater versus the resistance of the water I cant quite see the wheels slowing down, or the cruise computer speeding them up for that matter. If anything the wheels may actually turn easier/faster (hence the sudden high rev). Cruise control systems aren't instantaneous, they take time to compute that the driveline is spinning faster, hence takes time to reduce engine back to correct speed. I liken this to the idea that often when you 'cruise' over the crest of a hill, the car will over-speed...no cruise control can predict that it needs to decelerate until it registers that it is over-speeding. I think you'll find, that cruise control systems dont measure accelleration, or decelleration rates, only definite speeds.

So I believe, yes, at the begginning of aquaplaning a car will rev, in the few seconds it takes for the cruise control computer to realise that the wheels are now suddenly spinning faster and easier than they had been. This effect wouldn't last very long at all. I wonder, idly, if you'd even notice it in a -good- cruise control system. Some of the aftermarket cruise control systems are not very accurate though, and have more 'lag'. So I suppose there is the possibility that the phenomenon of the cruise "speeding up" the car could last longer on these systems.

The answer? Cruise control is -not- traction control. They're relatively slow and stupid systems.

Well you have all had you analytical brains, going overtime on that one. Let me hazard a guess, busted, its an urban myth
why the road experts may ask, well in all the years I was in the NSW cops, I never met anybody in the cops who was smart enough to be able to give an opinion such as that. A prang is a prang, for opinion like that you go to the experts.
What do you think LR Mick and Mick S?


john