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[ET] Tesla X will have two electric motors and beat a Porsche 911 to 60 mph - Page 12

post #111 of 198
Quote:
Originally Posted by Pheatton View Post

Then there is this little info, Tesla Motors’ Devastating Design Problem

$32k+ for a battery pack? That's crazy. Tesla is making money on that.

Quote:
Originally Posted by xplag View Post

@hc_416 You must not know too much about cars. Having two motors power different wheels is a feat in engineering, and that's when they're the same exact motor. Trying to match everything together with a (presumably) 6/7 speed auto and a 1 speed electric motor would be too expensive to be feasible.

It's not that difficult. There are some great advantages for the car to having the split drivetrain as well.
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post #112 of 198
Quote:
Originally Posted by rusky1 View Post

Quote:
Originally Posted by Blazing angel View Post

Quote:
Originally Posted by ljason8eg View Post

0-60 doesn't matter in most types of racing. Drag racing, possibly, but other than that it really doesn't. Most circuit racing takes place at speeds above 60 mph and doesn't feature repeated launches from a standstill.
A huge part of 0-60 time is gearing anyway. Not really indicative of overall performance.

WHAT.

Most races aren't won in the corners, but the straights in between the corners. 0-60 time can make a huge difference in races. (although suspension, geometry, and many other things also come into play a lot)

I hope you're joking. Most races, aside from drag racing, are won by the car/driver that has the best cornering speed. There's a reason why suspension and brakes are the first things upgraded on a track car or any race vehicle.

Sent from my Galaxy Nexus using Tapatalk

All racing pales in comparison to Finnish folk racing! Watch the Top Gear ep where James goes to Finland thumb.gif
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post #113 of 198
I honestly can't think of a worse development for the electric car cause. Not that I think we're at all ready for supporting electric cars (both in terms of battery capacity and electricity generation), but why not start with modest and economical/affordable cars for the masses if the goal is to offset dependence on crude oil. Then again, that's not really what Tesla is about.
    
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post #114 of 198
Quote:
Originally Posted by RonindeBeatrice View Post

With 4WD the torque is split evenly between the front and rear axles at all times. in situations wherein there is only one wheel contacting, or making traction with the road only 50% of the torque available from the engine (or motors in the case of electric cars) is available to that single wheel.
With an AWD car there are differentials between both the front and rear axles and between both wheels on each. This means that in situations where only one wheel has traction, the full 100% of the torque, or power is available to the single wheel with traction.
teaching.gif
Regarding the conversation on the range per charge, that is not nearly as important as the total energy cost per mile traveled, if a vehicle can meet my modest commuting requirements (approximately 30 miles per day which is average for most americans). An internal combustion vehicle (such as my Hyundai Elantra) is good for approximately 30 miles per gallon, or (at current gas prices) about 10 cents a mile (3 dollars a day ). If an electric car which charges at off peak rates at (8 cents a kilowatt hour) can deliver me to work and home using 20 kWh of electricity, then the electric vehicle is nearly twice as efficient (1.6 dollars a day).
For virtually all americans, with the exception of the very occasional road trip, an electric vehicle with a range upwards of 100 miles completely meets our needs.

Thanks I knew it was something to do with power to only 2 sets of wheels and power to each individual wheel. I was honestly too lazy to look it up and was going off of memory.
Quote:
Originally Posted by mortimersnerd View Post

Power stations are far more efficient at generating the power for a vehicle than a small gas engine. Electric vehicles have the advantage of instant torque off the line where as a gas engine has to rev up, so I would consider them fun to drive.
The other main advantage is that "filling up" the 85kW tank would cost me ~$7 where it would be $60 for 15gal at $4.00/gal.
Batteries charge quickly from ~20%-70%. Tesla claims they can charge to 70% in about a half hour. For road trips, that means you stop for a bite to eat or a break every 200 miles and fill up. In comparison to a gas vehicles, I stop every 300 miles for at least 15 minutes on road trips. People will have to make a couple concessions to adapt to the use of electric cars but I think they are one way to lessen the reliance on oil. As they approach $30-40k I could see myself getting one.


What?

15 gallons = 420 miles for me = 51 dollars = less than 10 minutes to fill

1 charge = 300 miles = 7 dollars = how many hours to charge? (honestly Im asking if anyone knows)

they also said the 85 Kw battery will go 300 miles.

When I go on a roadtrip we only stop for gas. Period... We stop for ONLY GAS PERIOD.... This is why I have such good drive times from Amarillo to Boise (record is 18 hours average is 20) or Amarillo to Detroit (21 hour average) or Amarillo to Houston (9 hours usually) because we ONLY STOP FOR GAS and Im not stopped more than 10 minutes.

On this electric car I cant even make it to Dallas from Amarillo (360 miles) on a single charge. So I'm sitting outside Decatur Texas for how long charging this thing?
 
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post #115 of 198
I didn't know you all were this concerned about electric vehicles... This tech could be very handy for someone that doesnt drive very far in a day. Charge car at home overnight drive to work and back.... Simple
post #116 of 198
I think Tesla (and other fully electric cars) should offer lead-acid battery packs for people who only need 50 mile range.
$5k for lead-acid batteries is much more affordable than $10-35k for Li-ion batteries or whatever they use.

Would love to see GM bring back the 2-seater EV1 which used lead-acid batteries.
Instead of giving money to Tesla Motors, the us gov could have offered incentives to GM to start mass producing the old EV1.
     
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post #117 of 198
Quote:
Originally Posted by guyladouche View Post

I honestly can't think of a worse development for the electric car cause. Not that I think we're at all ready for supporting electric cars (both in terms of battery capacity and electricity generation), but why not start with modest and economical/affordable cars for the masses if the goal is to offset dependence on crude oil. Then again, that's not really what Tesla is about.

But that's exactly what they're about. It's just that Tesla Motors isn't a corporate giant that can absorb R&D costs with the assurance that they will turn a profit years down the road. So they have to target an audience that can afford early adopter premiums. Here's a quote from the company on the matter:
Quote:
"Tesla didn't start with the Roadster because the founding team thought that the world needed another sports car," spokeswoman Rachel Konrad said. "Rather, they knew that aiming at the high end of the market would allow them to turn a profit ... then cascade it down to more affordable cars."

Konrad says Tesla's strategy is similar to that pursued by cell-phone and flat-screen TV makers, which started off selling their products to wealthy early adopters then cut prices to mainstream levels as the technology developed.

source
post #118 of 198
Quote:
Originally Posted by Mach 5 View Post

Faster then a 911, but how long does it take to fully charge? If its any longer then it takes for me to fill my petrol tank, not interested.

Yeah. In my opinion all electric cars are fundamentally flawed in this respect.
Quote:
Originally Posted by CODman2014 View Post

lol no thanks, General Motors, will always be the best auto manufacture, even if Detroit is the new africa.

Ze Germans would like a word with you.
Edited by Boyboyd - 2/23/12 at 3:46am
post #119 of 198
Quote:
Originally Posted by Scars Unseen View Post

But that's exactly what they're about. It's just that Tesla Motors isn't a corporate giant that can absorb R&D costs with the assurance that they will turn a profit years down the road. So they have to target an audience that can afford early adopter premiums. Here's a quote from the company on the matter:
source

Yeah, that's absolutely true, it's what they're about. Still doesn't make it a good development in terms of electric car technology.
    
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post #120 of 198
Quote:
Originally Posted by CODman2014 View Post

LOL, no thanks.
I prefer my Dodge Challenger SRT8 from 2008...............to that electric tesla car, plus didn't the guy from paypal start up tesla motors?... lol no thanks, General Motors, will always be the best auto manufacture, even if Detroit is the new africa.

GM the best? You mean the guys who use starter shims, and touted DexCool as the new standerd? lol
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