I'm not a big NFL fan, but I do like Packers, still, as long as you don't put a big white G on the car, you should be good.
The car is looking awesome, just like your work David.
CK5
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The Willomet Charger
- Thread starter AgDieseler
- Start date
A desecration to Mopar nuts everywhere, this is my protouring, LS-powered, 1970 Dodge Charger; built at my shop, Willomet Motor & Fabrication.
The car is looking awesome, just like your work David.
I thought they all came in TNT Express orange?
He should add a big "S".
That way when he's driving around town people can say "look at that 'S' car go!"
snail joke anyone? anyone? I'll let myself out...
Firewall party.
David
David
Hope to see some of y'all Sunday morning. Think of it as a low budget Powerblock.
You can only pick one for a thumbnail, but we took photos with an actual camera. I usually end up liking them all.
David
You can only pick one for a thumbnail, but we took photos with an actual camera. I usually end up liking them all.
David
Notification on.
It looks fast sitting on stands!
So cool!
So cool!
Went to Orlando for work. Came back with the flu. Thanks, Orlando.
Worked on this super rough cage concept while I recovered. I’m trying to find that sweet spot where beam strength and torsional rigidity, space for passengers (dogs), and lightweight overlap on another.
It is elusive.
View attachment 0786a8a4b27744ca9386f8d3654edb1e.mp4
Everything is .065 wall 4130, 1-5/8 and 1-1/4 diameter. What’s shown would weight 120lbs.
David
Worked on this super rough cage concept while I recovered. I’m trying to find that sweet spot where beam strength and torsional rigidity, space for passengers (dogs), and lightweight overlap on another.
It is elusive.
View attachment 0786a8a4b27744ca9386f8d3654edb1e.mp4
Everything is .065 wall 4130, 1-5/8 and 1-1/4 diameter. What’s shown would weight 120lbs.
David
Are you trying to follow any sanctioning body rules? Are you alllowed to use 1 5/8 .065 wall? For NHRA you would need .083 wall for 1 5/8, but you can use anywhere from .049 - .065 for the 1 1/4 OD tubing depending on where it goes. I know you aren't building this as a drag car.
However, you might want to find a rule book for the autocross or whatever style of racing you might try with it someday, or maybe you already have?
Also, I think you will find during fabrication its easier to make the top halo bar and then make the A pillar bars separate.
What software are you using?
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There's nothing that guarantees that.Following their guidelines would be a good way to make sure it's safe anyway lol.
I'm sure it's gonna get it's legs stretched a few times
The rules are the results of trial and error.
They assumed some rules then when something bad happened they made them better, over years
There are two primary and conflicting references for this cage. The Hellucination Charger (minimalist road car), and the Rampage Camaro (maximalist time attack), with a dash of 4400 class in the form of a structural center spine.
RAMPAGE Camaro
roadstershop.com
My design violates both the SCCA and NASA rulebooks since it has no diagonal brace in the same plane as the main hoop, and the main hoop itself will have more than 4 bends (top is radiused, though they might let that slide and treat it as the allowable minor roof bend). It also doesn't meet either of their material minimums. Both of those rulebooks explicitly prioritize roll safety and say something like, "chassis rigidity is a side benefit." I approached this with chassis rigidity and passenger comfort as the priorities, and in that order.
The structural compromise that comes from lower door bars is offset by the structural spine. The torsional strength that comes from a diagonal brace is (attempted to be) made up in the shorter diagonal braces that still allow passengers (my dogs) to get in the back. Also, the spine is tied into the firewall and the rear suspension structure, so that's something similar to a shear panel at the front and maybe 1/2 of a shear panel at the rear.
At least, that's how it all works together in my imagination.
If I end up with a minimalist design like Speedkore typically goes for, then this is a rowdy road car that can run in the Optima events. Optima's cage guidelines are essentially one sentence that says, "you should think about putting one in your car." That might be enough, since this is the wrong car for competitive autocross (fun, but not competitive). My local track has its own tech inspection, and I can participate in their open track days. Plus, there's always the fun public roads like the 3 Sisters in Central Texas.
I drew all this in bendtech to get my different thoughts "down on paper" and roughly estimate how much tubing I would need. 4130 is a common domestic alloy, but I want to get ahead of any price increases that come from the general pricing lift provided by import taxes. Right now, it's still reasonable, but hope is not a plan. Anything leftover will find a home on the suburban or waggy or whatever.
This is a very good reason to at least reference their design rules, even if I don't follow the wall thickness minimums.
David
Do they drill a hole in a tube or use a fancy tool to bounce a wave off somehow?There are two primary and conflicting references for this cage. The Hellucination Charger (minimalist road car), and the Rampage Camaro (maximalist time attack), with a dash of 4400 class in the form of a structural center spine.
RAMPAGE Camaro
My design violates both the SCCA and NASA rulebooks since it has no diagonal brace in the same plane as the main hoop, and the main hoop itself will have more than 4 bends (top is radiused, though they might let that slide and treat it as the allowable minor roof bend). It also doesn't meet either of their material minimums. Both of those rulebooks explicitly prioritize roll safety and say something like, "chassis rigidity is a side benefit." I approached this with chassis rigidity and passenger comfort as the priorities, and in that order.
The structural compromise that comes from lower door bars is offset by the structural spine. The torsional strength that comes from a diagonal brace is (attempted to be) made up in the shorter diagonal braces that still allow passengers (my dogs) to get in the back. Also, the spine is tied into the firewall and the rear suspension structure, so that's something similar to a shear panel at the front and maybe 1/2 of a shear panel at the rear.
At least, that's how it all works together in my imagination.
If I end up with a minimalist design like Speedkore typically goes for, then this is a rowdy road car that can run in the Optima events. Optima's cage guidelines are essentially one sentence that says, "you should think about putting one in your car." That might be enough, since this is the wrong car for competitive autocross (fun, but not competitive). My local track has its own tech inspection, and I can participate in their open track days. Plus, there's always the fun public roads like the 3 Sisters in Central Texas.
I drew all this in bendtech to get my different thoughts "down on paper" and roughly estimate how much tubing I would need. 4130 is a common domestic alloy, but I want to get ahead of any price increases that come from the general pricing lift provided by import taxes. Right now, it's still reasonable, but hope is not a plan. Anything leftover will find a home on the suburban or waggy or whatever.
This is a very good reason to at least reference their design rules, even if I don't follow the wall thickness minimums.
David
You're supposed to leave a 1/8" hole in each the required members for inspection. I reckon you just place the purge holes strategically during fab, and don't fill them after fab.
David
That makes sense, for someone that doesn't know how to tig and barely use a squirt gun I never thought of it.
The NHRA tech guy has an ultrasonic wall thickness tool he uses, puts a little gel on the tube and measures the thickness without harming the cage. No reason to leave a hole.
