FW: Message for Jeffrey re: Wrightspeed cleantech electric supercar
From: David Grosof
[mailto:grosof@sloan.mit.edu]
Sent: Thursday, February 21, 2008 3:47 AM
To: Lesley Groff
Subject: Message for Jeffrey re: Wrightspeed cleantech electric supercar
Hi,
A few months ago I took a ride in the prototype Wrightspeed electric car. It
was the fastest-accelerating car I've ever been in, (0-60 in 3 sec) depicted
here:
http://www.wrightspeed.com/x1.html
I heard a quite detailed talk about the technology (under NDA) and can
arrange for you to chat with the key guy, founder Ian Wright. I was impressed
but more important, the smart engineers with whom I attended were impressed.
The rationale and special design features for this car are quite interesting,
so that they are aiming at a very different market segment from the
better-known Tesla and most of the various hybrids:
COMPANY
At the dawn of the energy age,
there is increasing interest in minimizing the amount of oil used for personal
transportation.
With recent and ongoing advances in battery technology, the electric car is
making a comeback. With 3 times the energy efficiency of the best hybrids (4
times better than fuel-cell vehicles), and the ability to use energy from any
source via the existing grid, electric cars probably are the long-term
solution.
But oil is still relatively cheap, and batteries are still expensive. When the
rising curve of oil price crosses the falling curve of battery price, there
will be a mass market for electric vehicles.
In advance of that market, we at Wrightspeed are developing advanced electric
drivesystem technology, and making use of an interesting property of electric
drivesystems: there’s no tradeoff between performance and efficiency.
Internal combustion engine (ICE) cars have an intrinsic conflict: if they are
built for performance, they are thirsty; if they are built for efficiency, they
are slow.
This is not the case for electric cars. Our Wrightspeed X1 prototype is faster than
anything available except the Bugatti Veyron, yet it returns 170mpg equivalent
in city driving. If we reduced the power to one quarter of the current power,
the car would be correspondingly slower – but it would be no more efficient.
This means we can design and build and sell very interesting cars – extremely
fast cars – without compromising energy efficiency. The drivesystem technology
we develop can be applied to other vehicles in the future, as economics permit.
If reduction in fuel consumption is the goal, it would be better to replace
10mpg cars with 20mpg cars, than to replace 50 mpg cars with 100mpg cars. 5
times better.
Counter-intuitive? Here’s the arithmetic. The 10mpg car uses 10 gallons to go
100 miles. The 20 mpg car uses 5: a saving of 5 gallons. The 50 mpg car uses
only 2 gallons for 100 miles, so replacing it with a 100mpg car only saves one
gallon.
The fuel consumption problem is not that the current hybrid cars only get 50
mpg. That’s not where the fuel is going. Look around you on the freeway, and
count the 10-15mpg cars. That’s where the fuel is going. If we can replace a
10mpg car with an electric car, at roughly 100mpg well-wheels equivalent, we
save 9 times as much fuel per mile than if we replace the 50mpg hybrid
commuter car.
At Wrightspeed, we will do exactly that, starting with extreme performance
supercars.
And the improvements we are making in electric drivesystems raise the
performance driving experience to a new level. Faster, more fun, and
safer. We expect that some of these enhancements will eventually find their way
into all cars.
source:
http://www.wrightspeed.com/company.html
