gt1guy
Apparently a racist
I just wanna see the oversize clay pigeon thrower thats throwing that tire
3:23 in this vid. Looks to be some sort of air cannon contraption.
I just wanna see the oversize clay pigeon thrower thats throwing that tire
A 4130 cage of the same diameter and wall tube is definitely going to be stiffer. That is why SCORE used to let you run thinner wall 4130 than mild. It kept the strengths about the same. The new cage rules coming down the line will cause more issues than they solve. The minimum structure mandate for weight is way to high in my opinion. The cage will be intact but the driver won't. They are baising the new rules on feelings and preferences over actual solid data and testing. But, Roger is always right........I think we agree more than we don't. Just differing thoughts on the terms.
A 100% completely rigid immovable cage, will transfer every bit of energy from a hit to the passengers. This is not optimal.
A properly constructed cage can be both strong and absorb energy at the same time without failure. This is what we are shooting for.
A flexy cage has members moving in ways that can lead to over stressing, over stressing other members, or cause a cascading effect leading to complete failure. This is where seats begin to move and harnesses get loose.
NASCAR mandates all roll cages to be made from mild steel for the energy absorbing aspect. CroMo will transfer more energy from a big hit directly to the driver due to the strength increase over mild steel. So same car, same cage, same crash. CroMo cage will be more rigid and therefor hurt more.
3:23 in this vid. Looks to be some sort of air cannon contraption.
I am curious.Sounds more like you got really fucking lucky, as opposed to the bolt in Smitybuilt cage performed some kind of miracle. I'm glad you walked away. That doesn't look like it was a fun ride.
I am curious.
How much of a difference does it make having the cage inside of a cab (like in the picture from bdkw1 ) vs something like a tube buggy where there isn't another layer between the cage and the ground?
I am assuming that having the cage inside a "stock" cab would spread the loads out a little and make the point loads on the cage itself a little less (either from the cab acting like a slider, or just from having another layer of metal to deform and then to spread out the impact to the tube itself over a larger area) vs a tube buggy with some panels between/over the cage bars on the roof, or just the roof tubes).
Aaron Z
A 4130 cage of the same diameter and wall tube is definitely going to be stiffer.
One of my pet peeves at the moment is the extra vertical bar in the A pillar making it an A. Yes the A pillar will deform in a hard hit. But, it is just about as far from the driver's head as you can get in the roof structure. Front impacts here are what cause head and neck injuries Ala Dale Earnhardt. To me having this area deform under a heavy hit is beneficial. But the people with input to the new SCORE rules feel differently. Neither of us has hard data to say which way is better, both are working off gut feelings and past crash experience. To me having a cage that will never give is the wrong answer.
Forward impacts don't bring the seat into the equation. Especially if your endoing and landing flat on the roof line. This is all on the belts and will leave you with bruised shoulders.And to add....... When the cage surrounding the driver takes a hard hit and doesnt give, the high dollar race seats should be the next thing in line to absorb some of that energy before reaching the occupants.
Seats are like helmets, is your life worth $300 or $3000?
Wouldn't a bigger concern be rolling over at speed (barrel roll) and having something (a large rock?) impact along the top front (top of windshield bar, top of the A pillar, etc) and causing the cage to fold back somewhere on the A pillar, crushing the driver?Forward impacts don't bring the seat into the equation. Especially if your endoing and landing flat on the roof line. This is all on the belts and will leave you with bruised shoulders.
Forward impacts don't bring the seat into the equation. Especially if your endoing and landing flat on the roof line. This is all on the belts and will leave you with bruised shoulders.
Is that the same size tube and wall as the cage. If so, overkill. Also, door bars should intersect the dash bar. The windshield A's should have lined up with the verticals to the dash bar. But as you are working around a body none of that may have been possible without serious butchery. The extra beefy A pillars will make up for it.You saying I wasted my time bracing the A pillar bars?
Golf carts kill me, the whole front of that thing doesn't look like it's attached to the main cage. The whole thing looks like one big crumple zone.
FIA has been doing this for decades now, and they’ve learned a lot of hard lessons in the mountains and trees. Cage’s job is to protect the occupants from getting hit/smooshed. The harnesses, helmets, SFI/FIA padding, seat and HANS are there to help the driver deal with the G-forces of a wreck.One of my pet peeves at the moment is the extra vertical bar in the A pillar making it an A. Yes the A pillar will deform in a hard hit. But, it is just about as far from the driver's head as you can get in the roof structure. Front impacts here are what cause head and neck injuries Ala Dale Earnhardt. To me having this area deform under a heavy hit is beneficial. But the people with input to the new SCORE rules feel differently. Neither of us has hard data to say which way is better, both are working off gut feelings and past crash experience. To me having a cage that will never give is the wrong answer.
All the more reason not to listen to the Reddit types who think the cage should also function as a crumple zone.TT's see many crashes.
I'm not talking just WRC, but even WRC level has the cage right against the exterior sheetmetal. There isn't really a "crumple zone" except for the stock sheetmetal on the back of the car (since hatchbacks/wagons generally compete).Rally cars are a little different being full body. That body absorbs a lot of energy before it hits the cage. There cages are pretty light duty compared to what we see. They are made to survive 1 crash then get scrapped. TT's see many crashes.
Rally cars are a little different being full body. That body absorbs a lot of energy before it hits the cage. There cages are pretty light duty compared to what we see. They are made to survive 1 crash then get scrapped. TT's see many crashes.
Miller's Pro Chassis is what I'd want the A-Pillar area to look like, for an offroad machine.
Usually is even tied to it with big ass plate gussetsI'm not talking just WRC, but even WRC level has the cage right against the exterior sheetmetal.
Agree to disagree.They crash a stage, the crowd rolls it back over, limp it through the rest of the course, then frantically repair it to continue on with the next stage.
I'm talking multiple crashes in the same race. TT's are mostly a rich guy sport, some of them should not be driving something that fast.I'd think any TT that takes a big hit gets a very thorough inspection when it gets back to the shop and any compromised tube gets cut out and replaced.
I'm talking multiple crashes in the same race. TT's are mostly a rich guy sport, some of them should not be driving something that fast.
I've been in 2 rollovers in the same race. We finished, but the were several wrench welded on to various suspension parts...