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Grex > Cars > #106: Cleaner motor vehicles |  |
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keesan
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Cleaner motor vehicles
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Apr 1 17:15 UTC 1998 |
In item 33 on handicap access we started talking about less-polluting forms
of public transportation. Someone claimed that electric cars would produce
more total pollution than gasoline burners. I found a reference to the fact
that gasoline burning engines are less efficient than fuel cells, which are
less than 40% efficient. Electricity is about 30%, more if you use the heat
generated as a by-product. Does anyone know more about the various forms of
cleaner motor vehicles, those utilizing the various types of batteries,
electricity from power lines or 'third rails', or fuel cells? How does the
different technology work, what is the current state, what sorts of vehicles
are actually being manufactured and in use, relative costs, legal aspects?
California was supposed to be selling 10% zero-emission vehicles by 2003 -
does this include hydrogen fuel cells, or methanol fuel cells?
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| 163 responses total. |
albaugh
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response 1 of 163:
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Apr 1 18:18 UTC 1998 |
Actually the newest craze you'll see on the market, before electric cars, are
natural gas powered autos.
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n8nxf
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response 2 of 163:
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Apr 1 18:39 UTC 1998 |
I think that vehicle size is more of a problem. Why do people have to
have such huge vehicles? Those monsters get less than 13 miles out of
a gallon of gas. Current production small cars can go three times as
far, and further, on the same gallon.
Wasn't it Honda that said they would be building a zero emissions,
gasoline burning, vehicle by the turn of the decade?
Electric vehicles won't be accepted until we find a better way to store
electric power. Battery technology hasn't gone far since 1900. The
mass / energy and energy / $ ratio simply isn't high enough to compete.
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keesan
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response 3 of 163:
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Apr 1 20:34 UTC 1998 |
I presume zero-emissions does not include water and carbon-dioxide, but what
does Honda plan to do about the sulfur and nitrogen?
Fuel cells supposedly can burn fuel much more efficiently than internal
combustion engines. I read about hydrogen powered buses, and possibly
methanol power cars, that use fuel cells. What has actually been accomplished
already? Seems like you could generate an awful lot of methane from manure,
and then use it for fertilizer. Or from city dumps - there is a greenhouse
running off the methane from the Ypsi city dump. How difficult is it to
generate methanol from agricultural wastes? Why is more methanol not already
used in internal combustion engines?
The problem with electric cars is that people want them to also provide
heat. In California, this should not be a problem, but in the north perhaps
some other fuel, such as LP gas, could be used in a heater?
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senna
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response 4 of 163:
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Apr 1 20:46 UTC 1998 |
People concentrate too much on finding new ways of expending limited
resources, if you ask me. If you're going to worry about new sources of
energy and the limit on fossil fuels, why bother moving on to something else
that's going to run out, too?
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keesan
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response 5 of 163:
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Apr 1 20:50 UTC 1998 |
Methane and methanol will not run out, that is the point. You can generate
them from plants, which get their energy from the sun, which will not run out
of energy for many of our lifetimes. Batteries can be charged directly from
solar cells. Methanol is wood alcohol, the stuff that bootleg liquor used
to be adulterated wtih that caused blindness. Lots of little creatures will
produce the stuff for you at very low wages (just feed them waste, from
agriculture or industry). I think methanol has less energy per gallon, so
you would have to refuel more often, but is that a problem?
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dang
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response 6 of 163:
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Apr 1 22:51 UTC 1998 |
Not if the method of extracting that energy were more efficient.
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n8nxf
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response 7 of 163:
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Apr 2 03:32 UTC 1998 |
Some race cars run on Methanol. It is not currently a cheap fuel. I
know one problem is that alcohol burns with an inviable flame and no
smoke, making alcohol fires almost impossible to detect.
During WWII my grandfather, in Germany, had a car that ran on wood gas.
Wood was cooked in a boiler by a wood fire and the gases given off were
then used to run the internal combustion engine. I saw one of these cars
in a museum in Germany.
I have also seen pictures of busses with large bladders of methane
attached to their roofs. I'm sure the Ford Expedition and Chevy
Suburban crowd would go for those. Perhaps an electric Ford Power
Stroke truck or Dodge Ram?
In short, I don't think any of this is going to catch on big-time
unless it makes cars cheaper or more powerful or better looking.
First the mentality of the biology behind the wheel needs to changed.
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gibson
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response 8 of 163:
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Apr 2 03:36 UTC 1998 |
Hondas car is a low emission vehicle (lev) not a zev. I think levs are
10% of current emissions. There are batteries that can go extended distances
but the cost is prohibitive.
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gibson
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response 9 of 163:
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Apr 2 03:42 UTC 1998 |
Klaus, Amhearst has a wood gas pick up truck most years. If you're
interested in going this year, we will be trying to put together some car
pools. We would like to have a visible Mi. presence.
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roadtrip
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response 10 of 163:
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Apr 2 06:26 UTC 1998 |
I agree with the changing of the wheel.. something along the lines of a
*shudder* joysick, or a flight yoke would be much more interesting and
enjoyable.. and quite possibly safer in a crash.. but that's just my
speculation. actual milage my vary (depending on fuel type)
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scg
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response 11 of 163:
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Apr 2 08:03 UTC 1998 |
I suspect that while a joy stick might be safer in a crash, it would also make
it much harder to control the car, and therefore make crashes much more
likely.
However, that doesn't have much to do with changing the "mentality of the
biology behind the wheel" (in other words, the driver), which is what Klaus
talked about.
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n8nxf
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response 12 of 163:
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Apr 2 13:48 UTC 1998 |
I didn't see the wood-gas pickup the last time I went a couple of years
ago. I'd like to go again but other obligations will keep me close to
home for a while yet.
Got it on the 10% of current emissions, Patric. Thanks. That is pretty
darn good, however.
I can't see a flight yoke or stick on a car. Those are used on airplanes
where you have two axis of control: Back and forth and up and down.
In a car one could use the back and forth motion for accelerate and
decelerate, however that might be nasty in the case of and accident where
the driver is thrown against the stick / yoke.
Skid-loaders and dozers use two sticks poised in front of the driver.
These just control the speed of the wheels (tracks) on the left and
right side of the machine to control direction. They steer by skidding.
Tough on tires, tracks and driving surfaces.
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dadroc
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response 13 of 163:
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Apr 2 17:08 UTC 1998 |
I drove both the Ford joystick and the wrist twist cars. Both required massive
power boosters to work. Both reduced the "feel" of the road to almost not at
all. When safety issues first boiled to the top the steering wheel was a
killer to be banshed. Then they realized how many lives were being saved by
the feel of the car.
Electric cars have a simple drive, a motor in a wheel. But to control that
motor pushes the complexity into the power control circuits. We have no high
power contol technology that is cheep and easy. Star Wars has not begot
anything good enough to use.Did not thingk of it
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rcurl
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response 14 of 163:
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Apr 2 18:06 UTC 1998 |
Methanol is considerably more expensive to produce than gasoline. It is
also quite toxic by inhalation and has a high vapor pressure. It is also
hygroscopic, which leads to corrosion.
Biofuels are a "last resort". "Gasohol" is/was a subsidy to farmers, and
also diverted resources that would be better used for food production.
Farming wastes are *best* returned to the soil, to maintain fertility.
Fuel cells are the best choice as they can make use of a variety of liquid
and gaseous fuels, and have a higher efficiency than internal combustion
engines. The capital cost is the major economic problem.
The *even better* choice is conservation - public transportation, smaller
cars, car pooling, etc. This extends our fuel resources most efficiently
at very low cost.
seena put his finger on the current madness - primarily looking for ways
to find new resources to squander. The SUV craze is the most bizzare example
of this.
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dang
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response 15 of 163:
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Apr 2 19:07 UTC 1998 |
(Smaller cars *and* carpooling? I have yet to see a small car that can
fit me comfortably in the back, and I'm not even that big.)
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other
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response 16 of 163:
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Apr 2 21:48 UTC 1998 |
i think hybrid vehicles are really the next thing. combinations like electric
powered with a small internal combustion generator to recharge when needed,
etc.
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keesan
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response 17 of 163:
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Apr 2 22:25 UTC 1998 |
Isn't there some way to produce methanol from agricultural wastes, using
fermentation, while preserving the nutrient part of the wastes, which is the
nitrogen, phosphorus and potassium, not the carbon and hydrogen?
I found a chapter in Phillip Ball's 1997 Made to Measure, New MAterialsf or
the 21st Century, on different sorts of batteries and on fuel cells and solar
power. Let's stick to fuel cells, first. They may be expensive as regards
technology, but so are internal combustion engines. If you made enough of
the fuel cell type, costs would go way down.
In the hydrogen fuel cell, there are two separate cells, one with
oxygen, the other with hydrogen (you can substitute other fuels). There is
an electrode in each cell. The gases are bubbled through solution over the
metal electrode, they give up or accept an electron via the metal, and you
have electricity. (I presume there is some way to join the resulting ions
to make water). Other cells can burn methane, and produce CO2 and water, but
they operate much more efficiently than just burning the methane (natural
gas). These cells can be made very lightweight, and you can refuel rather
than carrying a heavy battery. They were used in the 1960s on the Apollo.
IF you use an acid rather than alkaline electrolyte solution it can tolerate
carbon dioxide impurities in the fuel, and you can even use air instead of
oxygen. 200 phosphoric acid fuel cells can generate 210 kW at 140 volts.
You can also burn methanol in a fuel cell.
A typical acid fuel cell is less than 40% efficient. "That's still
better than an internal combustion engine". At the moment they cost twice
as much as a conventional power plant per kilowatt.
Vancouver put in a hydrogen powered bus in 1993, Chicago was supposed
to have one that can go 200 miles by 1996, and eventually all 2000 buses
should be fuel-cell types. Ballard was planning full commercial production
by 1998.
Cars are not designed to carry such bulky fuel, but can instead use
methanol. (Rane, gasoline fumes are also toxic, is there much difference?)
Methanol generates less CO2 than gasoline. The methanol is catalytically
converted to hydrogen, and can store more energy in the same volume.
Reasons to convert away from combustion-powered vehciles include
pollution, noise, and the fact that these fuels will run out. Simply using
less of them will just postpone this.
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keesan
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response 18 of 163:
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Apr 2 22:36 UTC 1998 |
From www.ttcorp.com/nha/advocate/ad24cta.htm, it appears that Chicago was
about a year behind schedule. Excerpts from the website:
Chicago Chooses Nonpolluting Fuel Cell Buses for City’s Public
Transit
Air Quality Grants, Stock Options Provide Financial Incentives
by Jacquelyn A. Cochran, Director of Publications, National Hydrogen
Association
_________________________________________________________________
The Chicago (Illinois, U.S.A.) Transit Authority announced in
September that it had added the first of three zero-emission fuel
cell-powered buses to its service fleet. A partnership between the CTA
and Ballard Power Systems, maker of the fuel cell engine which powers
the vehicles, will test the buses on actual public transit routes for
two years.
Once bus operators have been trained to operate and maintain them, the
fuel cell buses will be placed into revenue service later this year.
The three routes where the buses will run were chosen because they all
operate out of the same garage where the fueling station will be
located and because they travel through the downtown area where the
highest concentration of pollutants are created.
[part of section omitted on grants that funded this]
Congestion Mitigation and Air Quality grants
from the Federal Transit Administration (80%) and monies from the
Regional Transportation Authority (20%) provided a total of US$6.7
million toward the project.
The cost of the three Ballard fuel cell buses was US$1.4 million each.
Spare parts, maintenance, training, and engineering are expected to
cost US$1.6 million. Construction of the fueling station and the
hydrogen fuel cost US$900,000. An additional US$2.9 million was
provided by the FTA and the RTA to modify an existing CTA bus garage
that will house the new buses and to pay for additional site work,
labor costs by field forces, and additional monitoring systems. In
total, US$9.6 million was allocated for this project.
A newly built hydrogen fueling station at CTA’s Chicago Avenue
Garage houses the storage tank and refueling equipment for the fuel
cell buses. Air Products & Chemicals, Inc., built and maintains the
fueling facility, is supplying the hydrogen (derived from natural
gas), and is training CTA staff in safety and refueling procedures.
[INLINE] ©Copyright 1997. All Rights Reserved.
[the webpage was updated this January, don't know if they referred to the
buses put into Service Sept. 1997 or 96]
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drew
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response 19 of 163:
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Apr 3 00:45 UTC 1998 |
In my ongoing attempts to cope with the expanding universe, I've looked into
these things myself. I have found:
* Solar power yields 1300 watts per square meter, directly facing the sun.
The conversion efficiency is probably up to 10% by now.
* An _Impala_ class passenger car requires 25000 watts to cruise at 60 MPH.
A _Monte Carlo_ I think measured out at around 17000 to 19000 watts. This
is what must reach the drive wheels.
* Fuel costs as of the early '80s:
Propane $1.30 per gallon equivalent of gasoline
Methanol $2 to $2.50 per GEG
Ethanol $2 to $2.50 /GEG
Methane 50 cents /GEG
Wood (purchased) 33 cents/GEG
* The wood gas burner works by burning the wood with insufficient oxygen, thus
producing carbon monoxide, which is combustable, and feeding that into the
intake manifold. along with enough oxygen to burn it. The major problem with
the wood gasogen is that air is mostly nitrogen, which means that your fuel
is diluted right from the start. The end result of the calculations was that
a _Delta_ which topped out at 100 MPH on gasoline was expected to barely
make one-minute miles on wood gas. Other problems included ash particles
in the wood gas.
Nonetheless, it was the most attractive option, since not only would it have
been the cheapest per BTU to buy fuel for, but would also have allowed
wilderness refueling. So I looked into it a bit more closely than otherwise.
Unfortunately, I had no place to work on it at the time.
* Electricity from the power company currently costs about 13 cents a kilowatt
-hour (Detroit Edison) (or around 10 cents/kw-hr from Wyandotte Municipal.)
Gasoline out of the pump works out to about 2.2 cents/kw-hr.
* The Otto engine cycle running an 8:1 compression ratio has a maximum
theoretical thermal efficiency of around 65%.
* And finally, fuel consumption accounts for only about 20% to 25% of the
total cost of running a car. Half or more is in the purchase price, along
with the fact that the machine eventually wears out and needs repair or
replacement.
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keesan
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response 20 of 163:
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Apr 3 01:29 UTC 1998 |
Detroit Edison is selling us power at 9.13 cents/kWh.
Their special electric vehicle rate (7 pm - 10 am) is about 4 cents/kWh.
I live in Ann Arbor, where do you live?
The cost of running our car is primarily the $25 a month or so for minimum
required insurance. The car goes about 1500 miles/year at 35 mpg. At
$1/gallon, about $45 for gasoline. A new muffler was $90.
What happens to all the pollution in the form of wood smoke? And how
air-tight is the system that gets the carbon monoxide to the air?
I would expect that a car running on a battery would not need the muffler
replaced too often. Probably the same for fuel cell technology.
And you would not be repairing the engine. Less or no corrosion.
What maintenance costs would be involved in a battery-driven car?
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keesan
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response 21 of 163:
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Apr 3 01:31 UTC 1998 |
Correct that electric rate for electric vehicles to:
3.90 cents offpeak June-Sept, 2.90 cents Oct-May.
Sounds like electricity could be competitively priced quite soon.
Particularly if gasoline were taxed higher to penalize the pollution.
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gibson
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response 22 of 163:
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Apr 3 03:04 UTC 1998 |
One benefit of the wood gas generator is you can burn almost anything,
old tires are said to work great but filthy.
Ballard is in production and among other things has teamed up with Ford
Motor Co. to produce foel cell vehicles, I believe they are doing pickups.
If anyone wants to see a miniature fuel cell run a fan off the sun,
come to the Urban Options renewables day in Lansing , April 18, Keesan is
looking to car pool. I'm going to enter a car pool item, it may come in handy
for many events.
Electric vehicles are quiet, thoy dont need mufflers. A friend has
driven the GM Impact, he says it silent at idle<no motor turns) and under
acceleration you only get road noise. Lots of power. When U.S. Solar comes
through with a battery breakthrough we'll start seeing EVs on the roado
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senna
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response 23 of 163:
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Apr 3 04:30 UTC 1998 |
Methanol is primarily the fuel used by Indy style cars. It is less efficient
(The turbocharged CART rules engines burn about 1.8 miles a gallon over the
course of the race, and are capable of worse numbers), and expensive. It is
less likely to catch fire than conventional gasoline, but it burns clear--you
can't see it. This has caused the occasional problem in race condition pit
lanes, most notably at the 1981 Indianapolis 500 when Rick Mears caught on
fire along with his car. Methanol is a usable fuel, but it's not very
practical.
(In the 1994 German Grand Prix, Jos Verstappen's pit stop turned into a very
visible inferno when a connection problem caused less than a liter of gasoline
to spill out over a wide area, including much of the pit crew and Verstappen
himself. The fire was very visible and caused only minor injuries)
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rcurl
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response 24 of 163:
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Apr 3 06:24 UTC 1998 |
Electric powered with gasoline to recharge is *very* inefficient - plus
the battery problem. Fuel cells skip the heat-engine-electric generator
links.
Fermentation yields ethanol, not methanol. Methanol must be synthesized.
The soil also needs the cellulose and lignin, etc, for the creation of
humus to create loams. Otherwise you will end up with clay/sand.
The description of a fuel cell in #17 is not correct. The electrodes are
porous and on opposite sides of a porous (ceramic, e.g.) membrane, in which
is the electrolyte (e.g., potassium hydroxide).
Gasoline fumes are obnoxious. Methanol fumes are rather pleasant. Also, the
vapor pressure of methanol is higher than gasoline, so the concentration
is higher (and higher losses by evaporation). Gasoline fumes make you sick
first. Methanol fumes make you blind.
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