I wouldn't commission it and I wouldn't buy it, but I would drive it (if it was free). I have to admit it's an impressive build and it cranks the douche to 11. I suppose if you've got 20 billion dollars you could probably care less what a bunch of guys, and gals, on a car blog think. Plus Ellison is supposed to be an asshole and this certainly helps sustain that image. #cobra
@Fletch Lives: yeah, can't say I know him personally, but the story of his house in the bay area makes him look like a wanker. He builds this Japanese rock garden-inspired mega mansion for eleventy billion dollars, then fights to get it reappraised at fivety billion dollars cuz it's too weird to sell and thus not as valuable on the open market. Not that he's selling it, he just doesn't want to pay the property taxes on it's actual cost. #cobra
Well it is quite beautiful and a testament to the skill of the builders, but it is ultimately a flashy piece of kit to show off at the old boys club. After skimming through the book, there are too many compromises in my opinion. This would not stand up to repeated track use, a must for cobra I am commissioning in my head. Seriously impressive, but not for me. #cobra
I saw this while ago, and to me it's a work of art. Not a car focused on function. I wonder what this thing weighs compared to one with a tube steel or chromoly chassis. #cobra
As a mechanical engineer I have several problems with this car. It looks like an 8th grader with a basic understanding of cross bracing (probably from playing with his K-Nex) designed theses parts. That front spindle is terrible. Heavy, repeated braking with calipers mounted to aluminum (which fatigues, especially with heat) posts sticking off the side will equal cracks then the caliper slinging off and slamming into that over polished body. Also, bolting together chassis components that see tremendous vibration is not wise. Buy a welder. #cobra
@fierrogt: You're not the only engineer here friend. A welder produces localized changes in the material structure introducing failure modes under high stress. Just ask the Porsche 917. I suggest you read the book first and then go spouting off. #cobra
@Ben Wojdyla: I didn't read the whole thing, but the only real stress analysis I saw was FEA done with CosmosWorks, no mention of fatigue anywhere other than to say Porsche f'd up by welding their chassis.
But I would still be weary of an all aluminum chassis, I'd want to know what factor of safety was used and what type of lifetime they're talking about before the chassis splits.
Could this car go 100,000 miles? If its designed for 500,000 miles then OK no big deal.
With aluminum it will fail from fatigue eventually, its just a matter of how long. #cobra
@cyberquog: Most certainly, the ductility of aluminum and penchant for cycle fatigue means it can be a tough material to work with in a chassis, but Audi uses it with their A8, as does Lotus, as does Jaguar. Those solutions are extruded and bonded, this one's heat treated billet and bolted.
I'm guessing here, but if a bajillionaire, with bajillionaire buddies wants a cost is no object one-off vehicle, he's going to find the guys who know what they're doing, and after going through the whole book, I'm pretty sure he did.
Are their engineering compromises? Sure, every design is a compromise of function, weight, cost, space, kinematics, and aesthetics. But within the scope of building a billet car, i'd say they smacked it out of the park. #cobra
@Ben Wojdyla: Although I agree that welding this chassis would have been riskier than bolting it together, I too see some engineering issues...
Aluminum has no minimum fatigue strength, so I suspect cracks may pop up after even small amounts of driving. The 917 chassis was notable for the fact that it had a much shorter lifespan before it was replaced.
Also, no amount of money or material can fix the cardinal sin of rod ends in bending.
Don't get me wrong, its a beautiful piece of work, I just find it to be more of a showpiece than a genuine engineering accomplishment. #cobra
@Ben Wojdyla: Why is it necessarily an automatic no-no? Rod ends are (roughly) half as strong in that plane, but if it's sized appropriately for their design loads, then who cares? Your "engineering compromises" statement sums it up most accurately, but their will always be someone bitching about the way something is designed. I see plenty of seemingly non-ideal bracing and crappy load path, but I also didn't do the analysis. They mention the inclusion of artist's design cues, so it's not strictly an engineering exercise. I've dealt with that in the past, and as an engineer, it's sometimes hard to make that compromise. If someone wants to see an engineering exercise, go look at the Pikes Peak Tacoma up close.
If it said how much he paid, I missed it, but until it fails miserably under moderate driving conditions, I will just sit back and appreciate the amount of work that went into it. And the amount of money that I cannot fathom. #cobra
@klaud: It's not the rod ends that fail, it's the rod, the inclusion of a threaded end in a rod and the necessary stackup tolerances leave a less than perfect part. That said, adjustable length pushrods are totally normal on mid-level performance race cars, they can handle most loads happily when designed properly, however when you're talking extreme performance, fixed length rods with a yoke end are preferred. #cobra
@Ben Wojdyla: "the new guy" was talking about rod ends in bending, not compression. I assumed he meant the a-arm-to-upright connection, and the orientation of the rod ends. Not to belabor the point... #cobra
Swimmin' in women wit' they own condominiums
Five plus fives- who drive milleniums?
It's all about aluminum- what
I get a five hundred pound block for the month
I want it all billet out wit' the clutch
Reynolds wrap on my hands and a dutch
It's all about the aluminum baby-
Now whatcha wanna do?
It's all about the aluminum baby- Wanna be ricers- half-ass quarter-milers
It's all about the aluminum baby-
v-tec short-throwers- I be dippin' in billet Cobras
On the low while the Poles sing the chorus
Utterly amazing. I've been inside semiconductor processing tools that are less precisely engineered. The only question I have is why did they not go all out and machine their own 5.0 billet block and heads? #cobra
This is like some sort of extreme sexual fetish that takes some basically alluring characteristic that we're all normally quite attracted to, and exaggerates and distorts it, obsessively hyper-focusing on it to the point where it's creepy, perverse, objectionable and totally repulsive. #cobra
This polished aluminum Cobra certainly is an eye-catcher and probably a crowd pleaser. Would I want one? No. Would I want a leather-backed book for $4500. No. #cobra
Cost notwithstanding, it strikes a familiar chord. I'm reminded of Ken Imhoff's basement Lamborghini that by all measures was better than the car that it was intended to mimic, yet at the end of the day, it was still a fake Lamborghini.
I'm a bit of a machinery aficionado, and am completely enamored with the craftsmanship involved in creating this work of art, but even with its shinier crown, it's still a pretender to the Cobra throne.
On the plus side, someone making an entire chassis out of billet might be just what we need to kill the "billet for billet's sake" mentality in the custom car circles. #cobra
10/20/09
10/21/09
10/20/09
10/20/09
10/20/09
10/20/09
10/20/09
10/20/09
10/20/09
10/20/09
10/20/09
But I would still be weary of an all aluminum chassis, I'd want to know what factor of safety was used and what type of lifetime they're talking about before the chassis splits.
Could this car go 100,000 miles? If its designed for 500,000 miles then OK no big deal.
With aluminum it will fail from fatigue eventually, its just a matter of how long. #cobra
10/20/09
I'm guessing here, but if a bajillionaire, with bajillionaire buddies wants a cost is no object one-off vehicle, he's going to find the guys who know what they're doing, and after going through the whole book, I'm pretty sure he did.
Are their engineering compromises? Sure, every design is a compromise of function, weight, cost, space, kinematics, and aesthetics. But within the scope of building a billet car, i'd say they smacked it out of the park. #cobra
10/20/09
Aluminum has no minimum fatigue strength, so I suspect cracks may pop up after even small amounts of driving. The 917 chassis was notable for the fact that it had a much shorter lifespan before it was replaced.
Also, no amount of money or material can fix the cardinal sin of rod ends in bending.
Don't get me wrong, its a beautiful piece of work, I just find it to be more of a showpiece than a genuine engineering accomplishment. #cobra
10/20/09
10/20/09
10/20/09
If it said how much he paid, I missed it, but until it fails miserably under moderate driving conditions, I will just sit back and appreciate the amount of work that went into it. And the amount of money that I cannot fathom. #cobra
10/20/09
10/20/09
10/20/09
Swimmin' in women wit' they own condominiums
Five plus fives- who drive milleniums?
It's all about aluminum- what
I get a five hundred pound block for the month
I want it all billet out wit' the clutch
Reynolds wrap on my hands and a dutch
It's all about the aluminum baby-
Now whatcha wanna do?
It's all about the aluminum baby- Wanna be ricers- half-ass quarter-milers
It's all about the aluminum baby-
v-tec short-throwers- I be dippin' in billet Cobras
On the low while the Poles sing the chorus
It's all about aluminum- what?? #cobra
10/20/09
10/20/09
10/21/09
10/20/09
"LJE" is engraved on top of shifter know where gear pattern should be.
There's an Oracle usability/documentation joke in there somewhere.
This really is a stunning work of art. I wonder how it drives? #cobra
10/20/09
@comedian: Something like this, #cobra
10/20/09
10/20/09
10/20/09
Cheap build.
/sarcasm #cobra
10/20/09
10/20/09
I'm a bit of a machinery aficionado, and am completely enamored with the craftsmanship involved in creating this work of art, but even with its shinier crown, it's still a pretender to the Cobra throne.
On the plus side, someone making an entire chassis out of billet might be just what we need to kill the "billet for billet's sake" mentality in the custom car circles. #cobra