MaryC
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Flat Tow/Recreational tow

Sun Aug 01, 2010 8:06 am

Does anyone know if the Leaf will be towable by an RV. Since electric cars are very RV park friendly(lots of 50amp circuits) They might be a good toad.
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LEAFguy
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Re: Flat Tow/Recreational tow

Sun Aug 01, 2010 10:35 am

Mary, Nissan's party line on an ICE vehicle is no - they can not be flat towed. Reasoning - the transmission/drivetrain is not getting proper lubrication. Since the LEAF has no conventional transmission, it remains to be seen if they will approve flat towing.

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garygid
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Re: Flat Tow/Recreational tow

Sun Aug 01, 2010 10:46 am

You can tow it on a suitable trailer, but remember that the LEAF is a bit heavy.

Towing on 4 wheels (or with a front-wheel dolly) is probably not possible because of the (likely) automatic, 4-wheel Parking Brake system.

Can that system be disabled?
Probably only by turning the LEAF fully ON.

But, there could be a "parking-release" to override the system.
Then, towing on a front-wheel dolly is likely to be possible, since the rear wheels "should" turn freely.

The "flat" towing in the post above referred to 4-wheels on-the-ground towing.
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KeiJidosha
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Re: Flat Tow/Recreational tow

Sun Aug 01, 2010 1:13 pm

As a toad, it weighs more than a Jeep Wrangler. In addition to the “Parking Brake” issue, there is no “clutch” between the differential and the rotor. That would mean the motor spins with the front tires. Since this is a magnetic armature, you will get inductive drag (and voltage generation in the stator windings). This could be a problem producing not just drag, but back voltage in the inverter, which it’s not able to deal with power off.

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TimeHorse
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Re: Flat Tow/Recreational tow

Sun Aug 01, 2010 2:18 pm

Well, as we said in the other thread, turn the car on and leave it in ECO mode. First talk to a dealer if this is safe, but logically if they've designed the regenerative breaking such that it simply uses front tire motion to provide angular velocity and torque to the electric motor turning it into a generator which in turn charges the battery and where as in normal Regenerative Breaking, this is only activated by the break, the ECO mode, AFAICT, is activated by the lack of any pressure on the accelerator. Of course, this is all in theory.
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planet4ever
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Re: Flat Tow/Recreational tow

Sun Aug 01, 2010 2:44 pm

Hey, we were joking in that "other thread". Surely no one would seriously consider dragging a Leaf behind an RV while it was turned on and in Eco mode. Why would you want to push your already terrible RV mileage/gallon down even further just so you can do some inefficient charging from diesel or gas while you are driving? What you want in an RV toad is something you can pull with little resistance and charge by plugging in at the campground.

Well, OK, what you really want is little resistance and low inertia. The Leaf's weight means it fails on inertia, and it may fail on resistance unless the front wheels are off the ground. On the other side of the equation, what you usually need is a runabout for short excursions, rarely more than twenty or thirty miles at a pop, in my experience. The Leaf range is overkill.

P.S. I'm speaking from historical experience only. We gave up our RV lifestyle about five years ago due to ecological concerns.
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nerys
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Re: Flat Tow/Recreational tow

Wed Oct 08, 2014 10:27 pm

actually I was wondering JUST that. can you flat tow the leaf and regen charge it long term. ie for say 30 minutes.

might be a cheap way to "boost" a dead battery to a usable power level (couple bucks in gas)

also might be nice if we had a brake controller for rv towing so when on level of climbing me eliminate regen but when going downhill but butt tons of inertia we can enable mild regen to not only slow the rv a little bit but recharge the car at the same time. Free power basically.

would be interesting if that could be made to work.
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cwerdna
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Re: Flat Tow/Recreational tow

Wed Oct 08, 2014 11:00 pm

nerys wrote:actually I was wondering JUST that. can you flat tow the leaf and regen charge it long term. ie for say 30 minutes.

might be a cheap way to "boost" a dead battery to a usable power level (couple bucks in gas)

http://green.autoblog.com/2011/05/25/is ... by-towing/

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nerys
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Re: Flat Tow/Recreational tow

Wed Oct 08, 2014 11:20 pm

wow. seems like it worked PERFECTLY. they thought the computer flipped out (no it did not it just correctly reported the range he would get he if coasted with regen that much of course it recalculated once he started USING the battery and it got good data)

Very very cool. maybe not good for long term charging of course but in a pinch I think it would make for impressive results. it can charge at some 30+ kw in regen after all.

I wonder if anything gets hot doing this? the motor can sustain 30kw with no problem so I don't think it would over heat.

the battery can take a 30 minute DCQC charge so it should be ok with a short 10 minute tow charge too.
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Wufnu
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Re: Flat Tow/Recreational tow

Thu Oct 09, 2014 9:11 am

Difference in being towed and coasting down a verrrryy long hill? From the cars perspective, nothing. It's a waste of gas and money, plus needlessly adds miles on your odometer, but there you have it.

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