And what does "around town" mean to you? To me urban driving means two
or three urban-sized blocks between stops, hills, and no highways.
Nothing much over 30mph.
Peri
------ Original Message ------
From: "tomw via EV" <[email protected]>
To: [email protected]
Sent: 30-Sep-15 5:53:03 PM
Subject: Re: [EVDL] EVLN: The Big EV Debate> Go for Small or Big Battery
Pack?
The people I know with Leafs have similar experience as Ed, greater
range if
they drive around town at lower speeds than if they drive on the
highway at
higher speeds. My experience with my conversion is the same. I
consistently use about 240 Wh/mile at 60 mph and about 180 Wh/mile at
35
mph, both on approximately level terrain, confirmed by data logging
battery
current and voltage, as well as just checking energy use after a trip.
I generally get around 10% of energy used on a trip returned by regen.
Usually get about 50 -55% of kinetic energy back into the batteries
during
braking, and about the same percentage of vehicle potential energy back
going down hill. You have to remember that the some of the KE and PE
is
used to do work against rolling resistance and drag forces when
coasting
downhill and braking with regen. I posted quite a bit of data on this
here:
http://www.diyelectriccar.com/forums/showpost.php?p=366384&postcount=20
Maybe Peri drives on more hills in city driving than on the highway?
As far as the main topic, I would prefer a larger pack, one that gives
150
mile range at 60 mph on level ground at 75F ambient, to my current 65
mile
range at those conditions. I have been driving a small car for several
years (Suzuki Swift) in an area where at least 40% of cars are large
pickup
trucks (quite a few dual wheel) and large SUVs like Escalade and
Excursion.
Doesn't bother me. I think a small light car with a tough, strong
shell
could be quite safe - bounce off a big truck intact, like an electron
off an
argon atom. :^) 'Course being smashed between two large vehicles would
be a
different story.
Ian Wright (original designer of the Tesla drive train) and founder of
Wrightspeed, said he didn't think Musk would sell any electric cars
because
they were too expensive. That's why he left and designed a system for
heavy
commercial vehicles where there is much greater fuel cost savings.
High
end, high quality, sexy cars was likely the only way for Musk to be
successful, and likely something Wright didn't foresee, or doubted they
could pull off - pretty unusual for a startup to make such a highly
acclaimed car right out of the chute.
--
View this message in context:
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Sent from the Electric Vehicle Discussion List mailing list archive at
Nabble.com.
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