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garygid
Gold Member
Posts: 12466
Joined: Wed Apr 21, 2010 8:10 am
Delivery Date: 29 Mar 2011
Leaf Number: 000855
Location: Laguna Hills, Orange Co, CA

Re: Performance - Max Grade Climbing

Mon May 30, 2011 10:00 am

Oh, gear ratio, of course, yes! THANKS

The 8 to 1 gear ratio means 8 times the torque at the wheels.

So about 200 x 8 = 1600 foot-pounds at the wheels, perhaps enough for a 50% grade (about 26%), if the tires do not slip. A 100% grade is a 45º incline, VERY STEEP, that many would usually have trouble walking up, or even standing on.

Thanks, it's my brain losing connections, it seems. :lol:
Hey, what's so funny?
I don't know, ... and who are you anyway?

Edited to correct grade errors.
Last edited by garygid on Mon May 30, 2011 9:44 pm, edited 2 times in total.
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2011 LEAF, 2014 Tesla S85
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rainnw
Posts: 283
Joined: Tue Aug 31, 2010 10:26 am
Delivery Date: 26 Jun 2015
Location: Seattle

Re: Performance - Max Grade Climbing

Mon May 30, 2011 10:30 am

I have been taking some our steepest grades here for fun. No idea on grades, but it makes some hills in downtown seattle look flat.

It feels like my V6, if not better taking in account the lack of transmission downshift. If anything, I could probably beat anything off the line at a stop light.
Ordered 11/24/2010 (November)
Delivered: 5/28/2011
Red SL-e, ECO package, cargo, splashguards
Commute: 75 miles round trip (60 miles highway, 15 side roads)
miles: 45,000 miles
Charge daily to 100%, lost 1st bar at 43k

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TomT
Posts: 10645
Joined: Sun Aug 08, 2010 12:09 pm
Delivery Date: 01 Mar 2011
Leaf Number: 000360
Location: California, now Georgia
Contact: Website

Re: Performance - Max Grade Climbing

Mon May 30, 2011 11:23 am

The car must be in ECO mode for this to work which means it is on and "in gear". Leaving a vehicle like this is inherently dangerous unless you plan to have someone sitting in the drivers seat the entire time to monitor it and intervene if necessary... It may also illegal under some vehicle codes...
TonyWilliams wrote:Please expand on the "unsafe" part. If it's unsafe for regen, then I need to sell my car now.
Leaf SL 2011 to 2016, Volt Premier 2016 to 2019, and now:
2019 Model 3; LR, RWD, FSD, 19" Sport Wheels, silver/black; built 3/17/19, delivered 3/29/19.

Herm
Posts: 3765
Joined: Sun May 23, 2010 3:08 pm
Delivery Date: 29 Aug 2012
Location: Timbuktu, Mali

Re: Performance - Max Grade Climbing

Mon May 30, 2011 2:28 pm

Towing it behind an RV in Eco mode should work, but perhaps try it at first at 45mph or something like that.. make sure nothing overheats. How do you plan to attach it to the RV?.. the regen will put an unusual load on the towing attachment so dont get killed doing this. It will literally sap about 20hp out of the RVs engine so dont overheat it either.

Apparently regen is disabled when the battery is nearly full, so you probably wont get it to 100%. You could also attach the 120V EVSE and tow the Leaf on a dolly, and run the genset on your RV... or a 240V modified EVSE

Dont tell Nissan since you will probably void the warranty :)

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gbarry42
Posts: 888
Joined: Mon Jan 10, 2011 5:48 pm
Delivery Date: 06 May 2011
Location: Moonlight Beach

Re: Performance - Max Grade Climbing

Mon May 30, 2011 2:42 pm

That 22KW you saw at 60 MPH would be just about 30 HP. And if they're telling us about "into the battery" then you have to add some more for the generator inefficiency. So your RV might go from 12 MPG to 9...the thing you want to know is "Will I make to the campground?" The good news is, when the motor home starts speeding up on it own, then you know the LEAF is done charging :D
And there goes the first capacity bar! At 24,000 mi on 9/9/2013.
Second bar at 30,500 mi on 2/7/2015.

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planet4ever
Posts: 4674
Joined: Sat Apr 03, 2010 9:53 pm
Delivery Date: 02 May 2011
Leaf Number: 1537
Location: Morgan Hill, CA, south of San Jose

Re: Performance - Max Grade Climbing

Mon May 30, 2011 2:47 pm

Herm wrote:Towing it behind an RV in Eco mode should work, but perhaps try it at first at 45mph or something like that.. make sure nothing overheats. How do you plan to attach it to the RV?.. the regen will put an unusual load on the towing attachment so dont get killed doing this. It will literally sap about 20hp out of the RVs engine so dont overheat it either.

Apparently regen is disabled when the battery is nearly full, so you probably wont get it to 100%. You could also attach the 120V EVSE and tow the Leaf on a dolly, and run the genset on your RV... or a 240V modified EVSE
Either way you will be using a huge amount of gasoline or diesel relative to the miles you add to the LEAF. Far better to charge at home before you leave, and charge overnight in an RV park each night you are away.

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

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TomT
Posts: 10645
Joined: Sun Aug 08, 2010 12:09 pm
Delivery Date: 01 Mar 2011
Leaf Number: 000360
Location: California, now Georgia
Contact: Website

Re: Performance - Max Grade Climbing

Mon May 30, 2011 2:57 pm

But it would make a pretty good Jake Break for those downhill runs! :lol:
planet4ever wrote:
Herm wrote:Towing it behind an RV in Eco mode should work, but perhaps try it at first at 45mph or something like that.. make sure nothing overheats. How do you plan to attach it to the RV?.. the regen will put an unusual load on the towing attachment so dont get killed doing this. It will literally sap about 30hp out of the RVs engine so dont overheat it either.

Apparently regen is disabled when the battery is nearly full, so you probably wont get it to 100%. You could also attach the 120V EVSE and tow the Leaf on a dolly, and run the genset on your RV... or a 240V modified EVSE
Either way you will be using a huge amount of gasoline or diesel relative to the miles you add to the LEAF. Far better to charge at home before you leave, and charge overnight in an RV park each night you are away.

Ray
Leaf SL 2011 to 2016, Volt Premier 2016 to 2019, and now:
2019 Model 3; LR, RWD, FSD, 19" Sport Wheels, silver/black; built 3/17/19, delivered 3/29/19.

Herm
Posts: 3765
Joined: Sun May 23, 2010 3:08 pm
Delivery Date: 29 Aug 2012
Location: Timbuktu, Mali

Re: Performance - Max Grade Climbing

Mon May 30, 2011 3:45 pm

mogur wrote:But it would make a pretty good Jake Break for those downhill runs! :lol:
Until the battery is full and the jake brake cuts out, then you die :)

smkettner
Posts: 7412
Joined: Mon Aug 09, 2010 10:13 pm
Delivery Date: 26 Feb 2014
Location: Orange County, CA

Re: Performance - Max Grade Climbing

Mon May 30, 2011 3:47 pm

garygid wrote:So about 200 x 8 = 1600 foot-pounds at the wheels, almost enough for a 50% grade (a 45º incline, VERY STEEP, that you would usually have trouble walking up, or even standing on), if only the tires would "stick" and not slide.
A 45º incline is a 100% grade. 100' out and 100' rise is 100%.

50% grade is 100' out and 50' rise. I will leave the trig angle to your slide rule. ;)
1 bar lost at 21,451 miles, 16 months.
2 bar lost at 35,339 miles, 25 months.
LEAF traded at 45,400 miles for a RAV4-EV
RAV4 traded in for I-Pace Dec 2018

ERG4ALL
Posts: 603
Joined: Thu Sep 23, 2010 11:17 am
Delivery Date: 10 Mar 2011
Leaf Number: 000404
Location: Phoenix/Show Low AZ

Re: Performance - Max Grade Climbing

Mon May 30, 2011 3:58 pm

If I'm not mistaken, I believe that the towing recommendations in the owner's manual advise against having the front wheels on the ground. If you're towing it behind an RV, it may be better to get one of those front wheel towing dollies.
Reserved 4/20/10, Ocean Blue Ordered SL 9/30/10, ESVE Installed 11/22/10, Delivered March 8th, 2011.

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