Thread: How to calculate Gradeability?

Originally Posted by uninformed

Ben, I believe its an arch....so it may, at its steepest be over 45, but only for a small section...its not a continual grade....

just a guess

Serg

PS there should be a pic of the old type in that LR book I sent you

I know Serg, I have seen it. Looks much less than 35 to me if this is the same one bill is talking about:

[ame=http://www.youtube.com/watch?v=oDuxlVxvq5I]YouTube - Land Rover Defender Hill Climb[/ame]

I am pretty sure the one at Wandin park is over 1 in 1 and steeper than the one here on U tube, and can be driven up and down the other side.And whilst the surface is grippy, the tyres on the Discos and R/Rs I've seen on it are mainly on road types.
Whats the departure angle on a Defender 110, 35 degrees? Unlike this u tube arch, the Wandin one has a short ramp at the base so that vehicles climbing it don't hang up on the rear bumpers.
Wagoo.

Originally Posted by isuzurover

You sure Bill? Got the measurements? It only looked around 45o to me.


Dougal - interesting... I thought >1 was impossible.

To get friction higher than 1G, it's basically tyres acting a little like blu-tack and adhering to the surface.

Rail dragsters can pull 3G's off the line, but they're dealing with a prepared surface as well which is a completely different ball-game.

Originally Posted by wagoo

I am pretty sure the one at Wandin park is over 1 in 1 and steeper than the one here on U tube, and can be driven up and down the other side.And whilst the surface is grippy, the tyres on the Discos and R/Rs I've seen on it are mainly on road types.
Whats the departure angle on a Defender 110, 35 degrees? Unlike this u tube arch, the Wandin one has a short ramp at the base so that vehicles climbing it don't hang up on the rear bumpers.
Wagoo.

Any pics??? I thought that was the same arch as the wandin one (maybe with different entry ramps)??? The vehicle belongs to a NSW company. How many big steel arches are there in AU?

does this count

[ame=http://www.youtube.com/watch?v=YTlIL8--r0U&feature=related]YouTube - land rover defender driving 45 degrees up an hydrodam wall[/ame]

here is another one I found

[ame="http://www.youtube.com/watch?v=J7A6NKn3JUM&feature=related"]YouTube - Land Rover climbing and cross eXtreme (motorshow bologna 2008)[/ame]

....some clown thinks its "Far over 45 degrees" but id guess at max 35....still not a bad structure to climb

Originally Posted by isuzurover

Any pics??? I thought that was the same arch as the wandin one (maybe with different entry ramps)??? The vehicle belongs to a NSW company. How many big steel arches are there in AU?

I've seen pics somewhere but a quick check on LROCVs picture gallery didn't turn anything up. I think it was provided by ULR and is a permanent fixture at Wandin and used mainly as a promotional exhibit during the LandRover sponsored Equestrian events.

I have limited download capacity, so didn't play the videos.Wasn't the Hydrodam wallclimb well in excess of 45degrees, but acheived with a winch rather than traction ?
Wagoo.