Vehicle & Technical > Defender
Defender 90 Truck Cab Rollcage? DIY?
bullfrog:
I think it may have been tomcat or similar(dont quote me) who used to make theirs out of scaff tube. I have an old 4x4 book somewhere and they speak highly of it. Most of the problems seem to come from poorly fabricated cages not the materials.
I am no expert but I am a fabricator .
Banger boys still use it and I have seen many a barrel rol and the cage held up fine ?
There seem to be different spec scaff tubes as well which dosent help !
Eeyore:
--- Quote from: "bullfrog" ---I think it may have been tomcat or similar(dont quote me) who used to make theirs out of scaff tube.
--- End quote ---
Thats the key phrase - 'used to'. If it's being sold to the public, it has to made to standards, and the standards call for specific tube types which scoffold pole doesn't reach.
Having raced bangers a couple of times (d'oh!), I have to say the safety mandate for that sport is abysmal. Heck, we even had a'cage' built from alloy scaffold, which really was a dumb idea (dude, what we're we thinking!). But as was said, no one gets hurt. A banger weighs nowt. Take a 1 ton car and strip it of everything and it weighs even less - it applies very little force to the cage when it goes over. Take 1.8 t 4x4, fill it with fuel, gear and body armour, place it on a steep slope and a lot of force can be applied to cage if it all goes the way of the pear.
As Wolfie says, I know what I'd rather have over my head. :wink:
--- Quote from: "bullfrog" ---Most of the problems seem to come from poorly fabricated cages not the materials.
--- End quote ---
Interstingly, when a cage fails, it will usually do so at the weld (same as bike frames). Does this mean the weld is bad? Possibley, possibley not. The welds on tubular structures are always sited at the points of maximum mechanical stress (i.e. the node twixt two or more tubes). So we put a weld there just to add the stress from that too. Welds fail prematurely for a number of reasons too - bad welds and bad parent material. Bad parent material increases your chances of a bad weld by about a factor of oodles.
And lets not even get started on T45!........
cheers
8)
Eeyore
bullfrog:
I agree other than I dont know many jags that weigh a ton ! :lol:
Eeyore:
--- Quote from: "bullfrog" ---I agree other than I dont know many jags that weigh a ton ! :lol:
--- End quote ---
We were cheap and used a Maxi! :lol:
We were poor, it was my only excuse!! :lol:
cheers
8)
Eeyore
woody:
--- Quote from: "Eeyore" ---
--- Quote from: "bullfrog" ---I agree other than I dont know many jags that weigh a ton ! :lol:
--- End quote ---
We were cheap and used a Maxi! :lol:
We were poor, it was my only excuse!! :lol:
cheers
8)
Eeyore
--- End quote ---
i used an escort then a maxi great fun at the time and my roll cage was the best quality scafold tube that i could find lying around the yard :oops:
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