Muddy doe (SA) posted:

Are you an accountant age?

A "quick in head calculation" and you worked out the % change to 0.1%!

LOL

Member - Phil G (SA) posted:

"don't know how you got your 750's to be so wide???"

Whoops missed the 180mm bit :-))

Willem posted:

Thanks for biting Phil :-)

With the sidewall I took into account that the tread would sink into the sand and the sidewall would stabilise against the side of the cut made by the tread.

Yes, it is going to be interesting to say the least. The Coopers at 15psi handled well in the sand. Maybe that was a tad low and 18 would probably have been OK as well.

An old desert traveller(name unknown) told me once in Birdsville that when he ran his tyres in sand, he ran them at 14psi on the Troopy and at 10psi on the trailer and that this was good enough for the Simpson. He was running radials on splits. Now I am not quite sure whether he did any offtrack stuff. Beadell Tours run MRF Supermilers on their Landy out in the desert and offtrack and it works well for them but they don't tow a trailer.

I will start the experiment on Little Red and see where it gets me....LOL

10psi on a MRF 14ply rating M77, on the trailer, doesnt even look bulged.

Cheers

Member - Phil G (SA) posted:

Willem,
You and your fuel trailer remind me of the Leyland Brothers in 1966. They wrote a book "Where Dead Men Lie" which described their across australia adventure. They had 2 LandRovers, one towing an oversized trailer. Their technique described in the book, was to send the lightweight SWB vehicle with fat tyres over the dune with a long rope and pull the second vehicle and trailer by driving the first vehicle down the dune. They reckon it worked. But after they broke a couple of diffs near Andado, I'm a bit surprised no other damage was reported until they got towards Birdsville. There are rumours around that they may have utilised the newly built French Line but they deny this.
Theres an interesting bit of discussion on the French Line Site by the workers who were out there.

Willem posted:

Well Phil, Its like this....lol

I would havee loved to buy a ute. But the only ute in which I could fit comfortably sort of, is a new Nissan(or slightly second hand). Both beyond my financial reach.So I ended up with the GQ.

I have seen too many vehicles break from being overloaded. So, against my better thoughts, I went out and bought a trailer. The trailer weighs in at 800kg all up when leaving base. After first fuel changeover it gets lighter all the time.

Last year I dragged the trailer to the Geo Centre of the Simpson, out and beyond the Cleland Hills, along the AB, DCarnegie, Eagle Hwy and then 200km Offtrack to the Calvert Ranges. I broke a Ubolt later in the year on a track at Warraweena. The trailer performed well.

So now I am looking at doing some stuff in the Simpson again. If the easy stuff proves too difficult with the trailer then I will do the offtrack stuff another time.

I am very careful when travelling offtrack and look where I out the wheels so that the ride may be a lot smoother.

Cheers

Willem posted:

Hi Robin

Yes, well!!!

I have a sandy driveway and did my measuring via the sand and a brush and a jack. As I said..."approximate" It will do. I see my tyre measuremnets aren't too far short of those of PhilG's

According to a 4x4 Monthly report, some time ago. A skinny tyre gave a longer footprint than a wide tyre.

As said in replies above. I will see how things go.

Cheers