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johnr
Posts: 884
Joined: Sun May 02, 2010 2:08 pm
Delivery Date: 11 May 2011
Leaf Number: 2151
Location: Exeter, CA

Re: Range-Speed-Bars Thumb Rule Table (12.5mph best range sp

Thu Aug 18, 2011 7:07 pm

I modified your chart slightly to improve the readability. To each their own, of course, but it helped me visualize it better. :)

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My trip to Mineral King and the value of regen

Charging stations, electrical adapters, and portable CHAdeMO quick chargers

2011 upgrade: Fossil < Leaf. 2014 upgrade: Leaf < imiev. 2017 upgrade: imiev < tesla. Done upgrading.

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evnow
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Joined: Thu Apr 22, 2010 11:41 am
Delivery Date: 25 Feb 2011
Leaf Number: 303
Location: Seattle, WA

Re: Range-Speed-Bars Thumb Rule Table

Thu Aug 18, 2011 7:22 pm

TonyWilliams wrote:Here's my latest revision, #5, to the range chart. Like always, I appreciate critiques to make it better. The biggest change is that about 12.5 mph is the best range speed.
I'd change 32 & 43 mph to 30 & 40 mph. None of our numbers are "accurate" anyway - so rounding the numbers makes it easier to visualize (and remember) and I think conveys the right level granularity.
1st Leaf : 2/28/2011 to 5/6/2013
2nd Leaf : 5/4/2013 to 3/21/2017
Volt : 3/25/2017 to 5/25/2018
Model 3 : 5/10/2018 to ?

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surfingslovak
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Re: Range-Speed-Bars Thumb Rule Table (12.5mph best range sp

Thu Aug 18, 2011 9:54 pm

I'd second the request to revisit the speeds presented in the table. Perhaps it would be possible to add 65 and 75 mph down the road. I'd be willing to help in whatever way I can.

On a related note, I've started using a new method to predict my remaining range. There is at least one other forum member using the same approach, and it seems to work quite well. So without further ado:

- reset your dash energy economy gauge (MPK) after each charge
- wait for the MPK number to settle (takes usually a 3 or 4 miles)
- multiply the MPK number by 1.5kWh to receive range estimate per bar
- multiply range per bar by the number of visible bars + 2 (reserve)

The range prediction is usually withing 2-3 miles of the actual. This method facilitates more dynamic driving, it's no longer necessary to maintain constant speed just to have confidence in the range estimate.

mdh
Posts: 122
Joined: Tue Aug 02, 2011 3:09 pm
Delivery Date: 10 Aug 2011

Re: Range-Speed-Bars Thumb Rule Table (12.5mph best range sp

Thu Aug 18, 2011 10:26 pm

surfingslovak wrote:I'd second the request to revisit the speeds presented in the table. Perhaps it would be possible to add 65 and 75 mph down the road. I'd be willing to help in whatever way I can.

On a related note, I've started using a new method to predict my remaining range. There is at least one other forum member using the same approach, and it seems to work quite well. So without further ado:

- reset your dash energy economy gauge (MPK) after each charge
- wait for the MPK number to settle (takes usually a 3 or 4 miles)
- multiply the MPK number by 1.5kWh to receive range estimate per bar
- multiply range per bar by the number of visible bars + 2 (reserve)

The range prediction is usually withing 2-3 miles of the actual. This method facilitates more dynamic driving, it's no longer necessary to maintain constant speed just to have confidence in the range estimate.
great method SS, you've really helped me learn so much about this car.

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surfingslovak
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Re: Range-Speed-Bars Thumb Rule Table (12.5mph best range sp

Thu Aug 18, 2011 10:52 pm

mdh wrote:great method SS, you've really helped me learn so much about this car.
Thank you for helping me to refine it! Happy to share, it's great to be part of this community.

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evnow
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Joined: Thu Apr 22, 2010 11:41 am
Delivery Date: 25 Feb 2011
Leaf Number: 303
Location: Seattle, WA

Re: Range-Speed-Bars Thumb Rule Table (12.5mph best range sp

Thu Aug 18, 2011 11:11 pm

surfingslovak wrote:On a related note, I've started using a new method to predict my remaining range.
Here is another ;)

http://www.mynissanleaf.com/viewtopic.php?f=44&t=5268

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1st Leaf : 2/28/2011 to 5/6/2013
2nd Leaf : 5/4/2013 to 3/21/2017
Volt : 3/25/2017 to 5/25/2018
Model 3 : 5/10/2018 to ?

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surfingslovak
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Re: Range-Speed-Bars Thumb Rule Table (12.5mph best range sp

Thu Aug 18, 2011 11:24 pm

evnow wrote:Here is another ;)
Nice, I saw your pics in the other thread! I have a feeling that this particular method will be the one to beat ;-)
Just out of curiosity, would it possible to read the MPK number from the CAN bus?

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planet4ever
Posts: 4674
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Delivery Date: 02 May 2011
Leaf Number: 1537
Location: Morgan Hill, CA, south of San Jose

Re: Range-Speed-Bars Thumb Rule Table (12.5mph best range sp

Fri Aug 19, 2011 2:55 am

I don't like it! In fact I hate it! You are upsetting me no end.

Most of my driving is local, at speeds around 25-35 mph. Your table says I should be getting 6-7 m/kWh, but I'm not. In fact I rarely go above 3.5 m/kWh unless I get on the freeway, then I can get up around 4.3 at 60 mph.

Now, I am not doubting you when you say you can get 8 m/kWh driving around a circle at 10 mph, but that is really only a laboratory experiment. In the real world if you are driving at those speeds it's because you are in a traffic jam, or heavy city traffic, or on residential streets. In all of those situations you have stops. Lots of stops; stops for traffic, and unsynchronized signals, and stop signs, and balls bouncing out between parked cars.

Even you, LEAFfan, with your incredible 9+ m/kWh, can you get more than half that at any speed -- pick your favorite -- if you have to stop six or more times per mile?

You probably thought I was joking with my opening statement here, but I wasn't, not really. That chart lies when it comes to real world conditions. Please, for my sanity, put a big asterisk on there stating that the numbers apply only for constant speeds, no slowing or stopping, and that frequent stops can easily cut the figures in half.

Ray
End of April 2013: Traded my 2011 SL for a 2013 S with charge pkg.

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surfingslovak
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Re: Range-Speed-Bars Thumb Rule Table (12.5mph best range sp

Fri Aug 19, 2011 8:05 am

planet4ever wrote:Most of my driving is local, at speeds around 25-35 mph. Your table says I should be getting 6-7 m/kWh, but I'm not. In fact I rarely go above 3.5 m/kWh unless I get on the freeway, then I can get up around 4.3 at 60 mph.
Ray, are you using AC most of the time? If so, what temp is it set to? Any hills in your area? I always had the sense that my energy economy was lower then what other owners reported, but that changed when I started measuring it at constant speed with no auxiliaries.

thankyouOB
Posts: 3583
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Leaf Number: 1442
Location: Coastal LA

Re: Range-Speed-Bars Thumb Rule Table (12.5mph best range sp

Fri Aug 19, 2011 8:19 am

how does this data figure in:
I go 50 miles a day, each day, to commute.
it takes 8 bars at 80% charge.
I use the AC for most of the trip and also use ECO for most of the trip.

that would be 6.25 per bar or a range of 75 miles.

Yet my average m/kwh is 4.4.

4.4 times 20 usable kwh in the car = 88 miles.
is my maximum range with this driving style and road mix 75 or 88?

any help from the SOC gurus?
may reserve/delivery 4/30/11
--
ECOtality/LADWP/ Blink 4/4/11
--
Gardena Nissan, msrp -1k
red SL with etec L3
SOLAR POWERED since 2008

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