I am responding to the message from Lee Hart regarding the LUKA EV.
I am the person driving the project so I can answer all the questions
raised... I will check this post works before I write the very long
response. It is my first time on this forum..
David,
You have raised some great points. I am the 'owner' of the LUKA project so
let me try to address everything.
The weight of the LUKA today is 741kg. (1634lbs). This includes the 2
battery packs. The bat pack is split in two for better weight distribution.
The overall battery size is
Thank you for taking the time to give such a lengthy explanation MWM. I
understand your approach much better now, and think you will learn a lot and
have some fun. You may make your goal in range at lower speeds with such a
light vehicle. I have a 2260 lb Suzuki Swift and a spreadsheet that
On 19 May 2015 at 15:43, MWM via EV wrote:
You have raised some great points. I am the 'owner' of the LUKA project so
let me try to address everything.
Hi, Maurice (I take it you're Maurice himself), and welcome to the EVDL!
Thanks for joining us, and for clearing up those points.
I
On 19 May 2015 at 15:43, MWM via EV wrote:
Hi, Maurice (I take it you're Maurice himself), and welcome to the EVDL!
Thanks for joining us, and for clearing up those points.
Yes, I am Maurice !.. EVDL is very good!!.. I will continue posting
everything to the hackaday site. The link
On 20 May 2015 at 16:08, David Nelson via EV wrote:
A free online version of Excel is available.
Thanks, but for me at least, that's not the problem. I have yet to find an
excel spreadsheet that won't work in the FLOSS program Gnumeric. There
might be some very complex ones that don't, but
On Mon, May 18, 2015 at 10:50 PM, Lee Hart via EV ev@lists.evdl.org wrote:
Hmm... does anyone know if there's an easy way to have an online active
spreadsheet, where the viewer can fill in his data online, and see the
results online? If I put it up as (for example) an .XLS file, people would
On 19 May 2015 at 0:50, Lee Hart via EV wrote:
Hmm... does anyone know if there's an easy way to have an online active
spreadsheet, where the viewer can fill in his data online, and see the
results online?
Maybe something like this:
of this message is
prohibited.
-Original Message-
From: EV [mailto:ev-boun...@lists.evdl.org] On Behalf Of Lee Hart via EV
Sent: Monday, May 18, 2015 10:50 PM
To: Electric Vehicle Discussion List
Subject: Re: [EVDL] EVLN: Open Source Street-Legal affordable long-range EV4the
masses
Mr23
On 18 May 2015 at 13:40, Lee Hart via EV wrote:
There is hope for going 186 miles on 24 KWH ... the Solectria Sunrise
went over 200 miles on a charge with its 26 KWH nimh pack on *many*
occasions, and even exceeded 300 miles with James Worden hypermiling
at the wheel.
This is true. A
Some folks may wish to work with excel, and save locally. I would still offer
the xls.
-Chris
On May 19, 2015 12:50:29 AM CDT, Lee Hart via EV ev@lists.evdl.org wrote:
Mr23 via EV wrote:
Lee, what about hosting your spreadsheets at your website, along with
all the other technical information?
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
-May-15 8:24:54 AM
Subject: Re: [EVDL] EVLN: Open Source Street-Legal affordable long-range
EV4the masses
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
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
___
UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub
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
Sent: Monday, May 18, 2015 10:09 AM
To: ev@lists.evdl.org
Subject: Re: [EVDL] EVLN: Open Source Street-Legal affordable long-range
EV4the masses
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
ev@lists.evdl.org
To: ev@lists.evdl.org
Sent: Monday, May 18, 2015 9:51 AM
Subject: Re: [EVDL] EVLN: Open Source Street-Legal affordable long-range
EV4the masses
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
.
.
-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: [EVDL] EVLN: Open Source Street-Legal affordable long-range
EV4the masses
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
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
Vehicle Discussion List
ev@lists.evdl.org
Sent: 18-May-15 11:40:19 AM
Subject: Re: [EVDL] EVLN: Open Source Street-Legal affordable long-range
EV4the masses
tomw via EV wrote:
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
, 2015 12:16 PM
Subject: Re: [EVDL] EVLN: Open Source Street-Legal affordable long-range
EV4the masses
On May 18, 2015, at 10:02 AM, paul dove via EV ev@lists.evdl.org wrote:
The rule of thumb is weight / 10.
Oooh -- that's a very useful suggestion.
How much does aerodynamics change
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
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
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
Source Street-Legal affordable long-range
EV4the masses
On 17 May 2015 at 19:22, Mike Nickerson via EV wrote:
Personally, my skepticism revolves around the hub motors (pun intended).
Lots
of people have tried them, and few or none have succeeded.
I'm sure I've missed some of the attempts
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