At over 4700 lb Tesla is hardly the benchmark for efficiency. My 2260 lb ev
5 1/2 year average energy use is 216 Wh/mile from the wall, with about 50%
travel on highways at 55 - 65 mph. Charger efficiency, measured several
times, is 0.91, so that's about 197 Wh/mile or 5.1 miles/kWh excluding
On 05/18/2015 09:51 AM, tomw via EV wrote:
What I've read also says that hub wheels are a problem for higher speed
vehicles due to unsprung weight, but I've no experience with them. A range
The URL posted for the car indicates that the hub motor(s) are sprung.
Maybe they have short axles and aren't truly hub motors?
-- Original Message --
From: Ben Goren via EV ev@lists.evdl.org
To: Willie2 wmckem...@gmail.com; Electric Vehicle Discussion List
ev@lists.evdl.org
Sent: 18-May-15 8:24:54 AM
Subject: Re: [EVDL] EVLN: Open Source Street-Legal
Hub motors are sprung, they are in the hub, which is sprung, as in sprung
weight.
.
-Original Message-
From: EV [mailto:ev-boun...@lists.evdl.org] On Behalf Of Peri Hartman via EV
Sent: Monday, May 18, 2015 11:27 AM
To: Ben Goren; Willie2; Electric Vehicle Discussion List
Subject: Re:
On May 18, 2015, at 8:14 AM, Willie2 via EV ev@lists.evdl.org wrote:
The URL posted for the car indicates that the hub motor(s) are sprung.
Huh? How on Earth is _that_ supposed to work?
b
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Larger diameter would be more efficient. If they don't need to carry much
weight you might look into using motorcycle tires which are narrower.
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/NEDRA)
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Does anyone know if the federal credit can be applied to a used EV
provided that the credit hasn't already been applied to that EV?
Peri
-- Original Message --
From: brucedp5 via EV ev@lists.evdl.org
To: ev@lists.evdl.org
Sent: 18-May-15 12:41:11 AM
Subject: [EVDL] EVLN: CO's Credit
http://www.torquenews.com/1/safety-place-when-vw-e-golf-hits-deer
Safety in Place When VW e-Golf Hits a Deer
By Armen Hareyan 2015-05-13
[image
http://www.torquenews.com/sites/default/files/image-%5Buid%5D/%5Btitle-raw%5D/vw_e-golf.jpg
We saw this picture on Fac ebook after one of the VW
http://www.cyclenews.com/45/33951/Racing-Article/Victory-Motorcycles-to-Race-Prototype-Electric-Motorcycle-at-the-Isle-of-Man-TT-Races.aspx
Victory Motorcycles to Race Prototype Electric Motorcycle at the Isle of Man
TT Races
By Press Release | 5/16/2015
[images
http://www.greencarreports.com/news/1098277_colorados-electric-car-credit-applies-to-used-cars-too
Colorado's Electric-Car Credit: Applies To Used Cars Too
By John Voelcker May 13, 2015
[images
http://images.thecarconnection.com/med/2015-nissan-leaf_100473864_m.jpg
2015 Nissan Leaf
http://www.torquenews.com/1/what-determines-residual-value-nissan-leaf
What Determines The Residual Value of Nissan LEAF
By Armen Hareyan 2015-05-13
[image
http://www.torquenews.com/sites/default/files/image-%5Buid%5D/%5Btitle-raw%5D/2014_nissan_leaf_residual_value.jpg
(screen shot of page
? I'm trying to use off the shelf parts so
building and maintaining the vehicle will be easy. Lawrence Rhodes
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The numbers you post for Tesla do not include charger losses, the 216 Wh/mile
does. The 196 Wh/mile number should be compared. Either way 216 or 196 is
far less energy/mile than a Tesla S uses, so more efficient at moving one
human around, which is the typical occupancy.
Maybe you are
The correlation between weight and efficiency is true below 45 mph in
general. Above 45 mph aerodynamics starts being more important than weight.
This is why the the heavy first generation Toyota prius has good highway
MPG. In general the stop and go nature of travel below 45 mph overwhelms
On May 18, 2015, at 9:24 AM, Roland via EV ev@lists.evdl.org wrote:
If you use a open spoke wheel that allows air to go thru the wheel, it is
recommended to install a aluminum deflection plate about 0.125 inch thick
that goes between the wheel and the axil flange, to prevent the air to go
-evdl.org
For EV drag racing discussion, please use NEDRA
(http://groups.yahoo.com/group/NEDRA)
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We must be using different terminology.
As best I understood it, the hub is the center of the wheel where the axle
connects. The hubcap covers the hub. And I thought that hub motors are in the
same basic location as the hubcap, with either the stator or rotor in the wheel
and the other half in
On 18 May 2015 at 11:35, Mark Grasser via EV wrote:
Hub motors are sprung, they are in the hub, which is sprung, as in sprung
weight.
I'm not positive, but I think the car's website has it backward.
I think the following is mostly correct; engineers please set me right if
not.
The body
You have it backwards. Unsprung weight refers to the weight which has no
suspension between it and the ground (tire, wheel, perhaps some or all of the
axle, diff, and driveshaft), while the spring weight is the portion which is
riding on springs (chassis, body, passengers, battery, etc.)
One
Lawrence Rhodes via EV wrote:
MICHELIN ENERGY SAVER 155/65R14 75SES2: This is the best tire I can get from
Michelin. Does everyone agree that it is hard to get a more efficient and
narrow tire? If this is so what super light rim should I use. If not is there
a better tire to use. Each
Ben Goren via EV wrote:
The URL posted for the car indicates that the hub motor(s) are sprung.
Huh? How on Earth is _that_ supposed to work?
One way is to have a long shaft on the motor. It acts like a swing axle,
like the old VW Beetles. The motor itself is mounted so it can pivot, or
has
On May 18, 2015, at 10:57 AM, Michael Kadie via EV ev@lists.evdl.org wrote:
The correlation between weight and efficiency is true below 45 mph in general.
That makes sense, and it's good news for my PHEV conversions...all-electric
mode is going to be mostly around town and mostly at or below
I thought that at freeway speeds the weight of the vehicle doesn't make
much difference. But how slippery it is does. Unless, of course,
you're going 186 miles all uphill.
Peri
-- Original Message --
From: Lee Hart via EV ev@lists.evdl.org
To: tomw tomofreno2...@yahoo.com; Electric
/20150518/9b756599/attachment.htm
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(http://groups.yahoo.com/group/NEDRA)
On Wed, May 6, 2015 at 1:50 PM, Ben Goren via EV ev@lists.evdl.org wrote:
So...if the insurance company winds up totaling the car, as we suspect they
might...can anybody suggest an inexpensive EV suited to a retired couple?
It would need to be freeway-capable with a reliable won't strand-them
in the center.
b
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On May 18, 2015, at 12:18 PM, paul dove via EV ev@lists.evdl.org wrote:
When I built mine I did a spread sheet.
Any chance you have a copy handy and would be willing to share?
Because of the nature of the project, I'm not overly worried about battery
range, but it's always better to refine
720 / 24 = 30 lbs per square inch.
At 12:54 PM 5/18/2015, Roland via EV wrote:
One more thing that I did not mention.
Is the square area of the solid rubber sections of the tire face
against the driving surface. You calculated the square area of the
actual contact surfaces of the tire and
Lee Hart wrote:
...have a long shaft on the motor... acts like a swing axle
...have a gear-, chain-, or belt-reduction between motor shaft and wheel...
Ben Goren via EV wrote:
Are any of those considered hub motor designs? I've never, for example,
heard of an aircooled VW as an hub motor
On May 18, 2015, at 11:56 AM, Lee Hart leeah...@earthlink.net wrote:
Ben Goren via EV wrote:
The URL posted for the car indicates that the hub motor(s) are sprung.
Huh? How on Earth is _that_ supposed to work?
One way is to have a long shaft on the motor. It acts like a swing axle, like
Paul Dove wrote:
When I built mine I did a spread sheet.
Ben Goren via EV wrote:
Any chance you have a copy handy and would be willing to share?
Here is a copy of the Excel spreadsheet I use for my performance
calculations. This is a dead version for email purposes (filled out
for my 1980
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Lee Hart via EV wrote:
Here is a copy of the Excel spreadsheet I use for my performance
calculations...
Grr... I'm sorry the columns don't line up. It seems like the modern web
simply can't handle a plain ASCII text file any more. Programs insist on
changing tabs, double spaces, fonts, etc.
Yes I agree that on average over different vehicle types the drag force
generally becomes larger than the rolling resistance force at around 45 mph.
The Tesla S is interesting in this regard though since it has very low Cd
and not that large of cross sectional area for such a massive vehicle.
Mr23 via EV wrote:
Lee, what about hosting your spreadsheets at your website, along with
all the other technical information?
That's a good idea. I'll do it. Thanks Mr23!
Hmm... does anyone know if there's an easy way to have an online active
spreadsheet, where the viewer can fill in his
Thanks Lee. The car is a 2001 Suzuki Swift, www.evalbum.com/3060
Yes it should have been 80% DOD. Thanks, I corrected it.
I keep the tires at about 36 psi (that's what the tire gauge says anyway).
Cd = 0.32 and rolling resistance plus brake drag = 0.014 gave best fit to
the roll down data,
On Mon May 18 20:42:44 PDT 2015 ev@lists.evdl.org said:
The two forces are equal for my car at about 45 mph, drag force is about 50%
larger at 55 mph, and about twice as large at about 65 mph. (Cd and rolling
resistance estimates from roll down tests)
I really should figure this out for my EV.
Lee, what about hosting your spreadsheets at your website, along with
all the other technical information?
-Chris
On 5/18/2015 5:17 PM, Lee Hart via EV wrote:
Paul Dove wrote:
When I built mine I did a spread sheet.
Ben Goren via EV wrote:
Any chance you have a copy handy and would be
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