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Re: Underneath the Beast; a Tour of the Dark Side

Posted: Sun May 15, 2011 9:14 am
by TonyWilliams
edatoakrun wrote:Are you are talking about accessing the spare from the underside?



Yes, like a typical mini van or pickup truck.


So, would you need to jack up the car, to access the spare?



No, the car would not need to be jacked up to access the spare.

Re: Underneath the Beast; a Tour of the Dark Side

Posted: Sun May 15, 2011 12:27 pm
by downeykp
EVDRIVER wrote:I would not call it a design flaw but smart weight reduction, since the car is likely to alway be near some services and only has a sub 100 mile range having a spare only adds much weight and additional cost. I have never owned and EV with a spare.

This might be true, but who wants to wait over an hour for a tow truck to come and then the additional time to tow to tire shop. Not me. I would rather change it and be on my way.

Re: Underneath the Beast; a Tour of the Dark Side

Posted: Sun May 15, 2011 3:47 pm
by aqn
OilFreedom wrote:Haven't heard a factory Leaf horn yet. If it sounds econobox, ...
It does.
Herm wrote:There is a thread on the forum about a replacement, do a search.
This may help.
Herm wrote:A loud horn is an important safety device.
Amen!

Re: Underneath the Beast; a Tour of the Dark Side

Posted: Sun May 15, 2011 5:59 pm
by aqn
Very informational and educational!!! Thanks for the kick-ass pics!

FYI: I added a pointer to the "parking/emergency brake" pics from here.

GroundLoop wrote:Given the intimacy of these pictures, are you planning to yank the battery pack? :)
TonyWilliams wrote:I'd want to read the actual service manual before doing that. I do have jacks that would work, and the center of mass is stamped into the lower main battery case.
Very cool!

The whole parking brake mechanism seems either overengineered or made complex in haste.. I can't tell which.
TonyWilliams wrote:Or both. There are lots of places on this car to cut weight. It doesn't even look like they made much effort there.
I haven't thought this through, but there may have been some marketing or engineering requirements that the parking/emergency brake be electrically actuated so its use can be integrated with the start-up-and-drive sequence. However, I can't imagine that a requirement that the parking brake be automatically disengaged if the driver steps on the gas pedal is so important that that Nissan would concoct such a Rube Goldberg machine of a parking brake.

Screw-driven piston in the rear calipers (actuated via a lever and cable, as on VWs) would have saved the weight of the drum brake parts, the electric actuating motor, the reduction gear, and the clutch. Even using a separate drum brake as a parking brake, as on a BMW 5 series, would have avoided the weight of the electric actuating motor, the reduction gear, and the clutch.

Re: Underneath the Beast; a Tour of the Dark Side

Posted: Sun May 15, 2011 9:17 pm
by GroundLoop
aqn wrote: Even using a separate drum brake as a parking brake, as on a BMW 5 series, would have avoided the weight of the electric actuating motor, the reduction gear, and the clutch.

Isn't this exactly what they did? (separate drum brake for parking brake)

Re: Underneath the Beast; a Tour of the Dark Side

Posted: Mon May 16, 2011 6:38 am
by aqn
aqn wrote: Even using a separate drum brake as a parking brake, as on a BMW 5 series, would have avoided the weight of the electric actuating motor, the reduction gear, and the clutch.
GroundLoop wrote:Isn't this exactly what they did? (separate drum brake for parking brake)
Yes, but the LEAF's drum parking/emergency brake is not merely pulled by cables manually as in the BMW, but is actuated by cables pulled via a clutch via a reduction gear via an electric motor via an electrical switch, hence "the weight of the electric actuating motor, the reduction gear, and the clutch".

Re: Underneath the Beast; a Tour of the Dark Side

Posted: Mon May 16, 2011 7:23 am
by edatoakrun
downeykp wrote:
EVDRIVER wrote:I would not call it a design flaw but smart weight reduction, since the car is likely to alway be near some services and only has a sub 100 mile range having a spare only adds much weight and additional cost. I have never owned and EV with a spare.

This might be true, but who wants to wait over an hour for a tow truck to come and then the additional time to tow to tire shop. Not me. I would rather change it and be on my way.


Not to mention cell phone coverage is not universal.

Several miles of my regular (hilly) 25 mile drive to town have no reception.

The weight penalty of carring a spare is definitely worth it to me, and good luck to any who can figure out a remedy to Nissan's design error in not including in the LEAF design a suitable place to carry an OPTIONAL spare for those who want one.

Re: Underneath the Beast; a Tour of the Dark Side

Posted: Mon May 16, 2011 11:43 am
by davewill
EVDRIVER wrote:I would not call it a design flaw but smart weight reduction...
Leaving it out is a weight reduction. Not allowing for it as an option is a design limitation. That said, I'm glad to save the weight since my commute is very local and well covered by cell phones, and between Nissan and AAA getting tow service is no problem.

Re: Underneath the Beast; a Tour of the Dark Side

Posted: Mon May 16, 2011 12:04 pm
by Herm
IMO I would just carry an extra can of tire sealer just in case.. only time in my long driving career that did not work is when I ran over a piece of 1/2" rebar sticking out of the ground. You really wont get too far from civilization with a Leaf.

Re: Underneath the Beast; a Tour of the Dark Side

Posted: Mon May 16, 2011 12:19 pm
by TonyWilliams
Herm wrote:IMO I would just carry an extra can of tire sealer just in case.. only time in my long driving career that did not work is when I ran over a piece of 1/2" rebar sticking out of the ground. You really wont get too far from civilization with a Leaf.


For me, in the past 11 years that I've lived in this house, we've had probably 5 or 6 flats. At least 3 of those destroyed the tire (nail in sidewall was one). Gooey tire sealer won't help, and you can leave the compressor and Goop home when you have a spare.