Corrugated Roads and the

It's even smoother if you drop tyre pressures a bit.

Duncs

70MPH on corrugation mmmmmmmmm that sounds like fun???? Saw a bloke towing an ordinary caravan with bog standard leaf spring suspension on the Battle camp road Nth of Cooktown a long time after the grader had gone over it... (Read bloody rough) And he was pedal to the metal... I thought if he makes it to the old homestead it will be a miracle… Never saw him again. But I’m betting it would be a heap of junk well before it’s time... Defiantly not something I’d try or recommend.
Cheers. RG.

Smoother ride may be mainly due to the tyres not fully making contact with the deep ruts.
When that happens and you want to stop or slow down the vehicle can side slip across the road. Anyone who has travelled on the Cape road and come across an idiot going too fast can vouch for that fact. They hit the brakes as they go round a corner and slide into oncoming vehicles and there is nothing they can do about it.
I reckon 70 would be about the safest, best speed and no faster.

Pooley

That's the one Doug.

Smoother for the driver maybe at the expense of the cars suspension.

Robin Miller

I'm with you Doug. If the corrugations are painful just slow down and enjoy the view. What's the rush? Safety first and drive to conditions.
Stano

That may have been my question about how they form.

Busy Bee, I dont think Pete was asking a Q about corrugations he was just telling us forumites what he saw on the telly :)

Cheers Luke

Hi Busybee

I posted some research on the subject; it is possible to calculate the best speed for a given height/depth of corrugation.....but let's face it, not much use out on the road unless you are a mathmetician....best rule of thumb is to judge what you think is safe for the conditions, but I lean towards preserving the vehicle as the greater the force you apply to something the greater the chance something breaks.

We thought that they were too close together. The bush princess said that they should have flown out here and asked me where to go as I can find plenty of corrugations without trying!

Pete

Plodder,

Shouldn't that be 75mm high and 3000mm apart or 3" high and 9'9" apart. Sorry being a part time pedantic old fart I pick up on stuff like that (LOL).

By the way I'm only part time pedantic. I am an old fart all the time. Just ask my kids.

Paj,

You sound like me. Set off down a little used dirt track and corrugations appear magically in front of you.

Duncs

Good one Duncs, did my training at the end of the old inch system, and it still carries on.
76.2mm x 3000mm.

Not being pedantic though :o)
Just old.

Got me.

Yes, but they are not 75mm high either. :o)
Notice how the larger ones in the centre are further part than the smaller ones in the tracks.