Thread: roll bars, are in your shopping list?

OK, what most people forget when looking at a cage is where the forces are going to be applied when it's used in anger.

It's very rare that you'll see a car just fall on its side...

Most rolls happen at some kind of speed and in that situation the leading edge of the roof takes almost ALL of the impact. The Discovery gives us a perfect example of just that, showing how the weight of the engine has pulled the nose of the car onto the road and flattened the leading edge of the roof into a wedge.



An internal hoop will be better than nothing but the most important place is to strengthen the top of the A pillar.

Julian's roll and the one off of the Lions Back shows us the importance of fitting a cage that's rigid and mounted to the chassis properly.

The early Land Rover products do not have much structural strength in the upper body. However, the new vehicles (other than Defender) do actually cope well in rollover situations now.

M

Originally Posted by mark2

The lack of any attention to structural safety by LR in the 110/90's wouldnt be quite as inexcusable if they werent so easy to roll. I have a series of photos taken during testing by the army of the 110's that show it rolling during a simple swerve test on the bitumen It no wonder the NAS Defenders all had to have external cages to be sold in that market.

You forget that the the Defender has evolved from a 1940's design... Current safety legislation is a world away from what it was then. The only reason the Defender can be produced today is that it is an evolution and not a new vehicle but you are very correct about the NAS vehicles.

M

It is a bit of a problem with the front shape of the Disco. An internal cage is possible but a curve in the pillar may weak the structure. I do not know with an external cage because I can not see where inside the front guard is fitted the pillar.

The External cage example for the Disco

Originally Posted by camel_landy

You forget that the the Defender has evolved from a 1940's design... Current safety legislation is a world away from what it was then. The only reason the Defender can be produced today is that it is an evolution and not a new vehicle but you are very correct about the NAS vehicles.

M

I didnt forget ............