Stability Control (ESC) for the Roadster

[Tdave]

According to this CR blog article:

Electronic stability control—more models going standard

While many models now offer this life-saving feature as standard, there are still a number of vehicles where it is just optional and several that don’t offer it at all. Some of these models will be phased out or replaced before the NHTSA mandate takes effect [in 2012]. Tesla has said that it is working on ESC for its roadster.

So the mandate goes into effect for 2012. And now Tesla has extended Roadster sales into 2012. So therefore it's being forced to add ESC, I suppose. I wonder if it was working on it anyway. When I spoke personally to Elon at the Model S unveiling in DC Jan 2009, his response to me about ESC was to the effect of, "No, why would the Roadster need ESC? It's not going to flip over."

If they do add ESC, I hope it's a retroactive upgrade possibility. Probably a tall hope, though.

[doug]

Really? I don't think the Roadster needs ESC. I'd also think they'd get some sort of a waiver like they have for the airbags.

They should, however, have ESC for the Model S.

[Tdave]

The Roadster could definitely use ESC. The car is very heavy in the rear, with twice as much weight on the rear wheels than the front. The handling is inconsistent at different speeds, and is one reason it understeers so drastically at low speeds. With ESC they could dial in more neutral handling and the ESC would help keep the tail under control at the limit. An ESC can do what a driver cannot do, and that is apply different inputs on individual wheels when at the limit of adhesion.

[tdelta1000]

I found this on the net and just wanted to share. Telsa MOtors had files a petition to the NHTSA for exemption on Electronic Stability Control Systems so follow the link. petition-temporary-exemption-from-electronic-stability-control-requirements-fmvss-no-126.htm

[dpeilow]

" Tesla sold or leased 276 Roadsters in the United States during 2010 and 62 Roadsters during the first quarter of 2011"

[TEG]

Yeah, I mentioned that a while back here:
end of advanced airbag exemption

[TEG]

Resurrecting an old thread that may have been more relevant than we realized.

Recently I had noticed that a request got filed to get an ESC exemption for the Roadster:

Federal Register | Tesla Motors, Inc.; Receipt of Petition for Temporary Exemption From the Electronic Stability Control Requirements of FMVSS No. 126

...Tesla has requested an exemption for the Roadster model for a period from September 1, 2011 to December 31, 2011...

Well, I happened to be by the Menlo Park store / prep center, and noticed more Roadsters than I expected parked all around the side. They didn't quite look like they were ready for immediate delivery as most were somewhat dirty, and many had headlights removed (perhaps getting the Xenon upgrade?). I noticed all over the place paperwork on the dash saying something like "hold for ESC".

Does that mean that they are now required to add ESC before they can deliver them?
Maybe the request for an exemption got denied?
Funny thing in the auto-biz is it seems the model year starts a little early. For instance as we go into September/October many manufacturers are pushing 2012 models which may include new regulations.


Also related:
ESC vs TCS

[strider]

Funny thing in the auto-biz is it seems the model year starts a little early. For instance as we go into September/October many manufacturers are pushing 2012 models which may include new regulations.

Yeah but I though Tesla was eschewing this nomenclature. My 2.5 was built on 10/7/10 which to any other car manufacturer that would be a 2011 model but my title says 2010. This seems really odd. Assuming production of the Roadsters will be done by the end of the year they can sell them into 2012 was 2011 models without having to comply w/ 2012 regs. Is production actually going to spill over into 2012? Seems like a lot of money to spend for just a handful of cars - I'm sure it would be cheaper to have whatever production spills over into 2012 to be kept as spare parts for cars that are wrecked.

[TEG]

Yeah, I thought the same too. Why can't they just call all the remainder 2011's and not worry about 2012 regs?

Electronic stability control - Wikipedia, the free encyclopedia

...The NHTSA requires all passenger vehicles to be equipped with ESC by 2012...

Why would they need an exemption for production Sept 1 - Dec 31?
Perhaps they anticipated needing to sell Roadsters into 2012, but the last minute demand of "last chance" meant they sold out sooner than expected?
Or maybe some other regulation means that ones made after Sept 1 must have the ESC? I don't know.

[TEG]

Hmm:
http://edocket.access.gpo.gov/2007/E7-11965.htm

...SUMMARY: In April 2007, the agency published a final rule establishing a new Federal motor vehicle safety standard on electronic stability control (ESC) systems for light vehicles. As part of that rulemaking, the final rule notice stated that NHTSA had decided to defer the standard's requirements related to the ESC telltales and controls until the end of the phase-in period (i.e., until September 1, 2011)...

It does look like they specified specific calendar dates, and not just let the manufacturers decide when to start the "2012" clock.
The previously deferred rule called for having something like 95% of 2011 models having ESC...