T.R | Title | User | Personal Name | Date | Lines |
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2214.1 | | OASS::STDBKR::Burden_d | Synchromesh gearboxes are for wimps | Wed Jan 26 1994 17:12 | 6 |
| I saw a picture of a 3 wheeler solar car (taken in Germany) in the minicar
and Microcar club newsletter. There wasn't really any info about the car,
mainly a picture. It had a single front wheel and might have been a 2
seater, but I'm not sure. It was fairly angular in shape.
Dave
|
2214.2 | | SUBURB::THOMASH | The Devon Dumpling | Wed Jan 26 1994 17:27 | 5 |
|
my milky has been happy enough with his for years.
Heather
|
2214.3 | fine ! | LEMAN::CHEVAUX | Patrick Chevaux @GEO, DTN 821-4150 | Wed Jan 26 1994 17:38 | 14 |
| Very good start indeed. We've already heard about
- solar EV
- battery powered EV's
How about discussing
- new battery technologies (besides lead and NiCd that is)
- hybrid vehicles (electric and conventional)
- forthcoming regulations (California, USA, EU, ...)
- pilots (I know the French ones)
Others ?
|
2214.4 | GM's efforts? | CGOOA::PITULEY | Ain't technology wonderful? | Wed Jan 26 1994 17:47 | 7 |
|
Has anyone heard the latest on the GM "Impact" EV? Last I heard it was
on hold.
Brian Pituley
|
2214.5 | | OASS::STDBKR::Burden_d | Synchromesh gearboxes are for wimps | Wed Jan 26 1994 20:59 | 28 |
| From what I remember about Californias regulations is that they will be
requiring a certain percentage of cars in the future to emit no pollution.
This percentage increases as the years go on. I can't remember any
details.
The other argument is that electric cars simply transfer the pollution from
the tail pipe of the car back to the smokestack of the generating station.
I know that France has a lot of nuclear stations and I don't want to touch
on that issue, but the power for the electricity has to come from somewhere
and that generates waste no matter how it is produced. Now, solar, hydro
or wind power plants would be different, but we don't have too many of
those around.
I think a key is for the term 'car' to be redefined when talking about
electrics. Don't expect a 4 passenger auto with all the creature comforts
you have today and the ability to cruise at 80mph all day long. Look at a
small commuting car, 1 or 2 passenger, fairly compact and light. Limited
top speed and cruising range. Gee, sounds like an Isetta doesn't it? But
think about it. It can do 50mph, carry two people, weighs 700lbs and only
requires 13.5 hp to propel it. It's design and technology is also 40 years
old so with some new lightweight material it would be lighter and safer and
more efficient. Now big is a 13.5 hp electric motor (I don't know), but it
can't weigh that much.
Trying to get the public to swallow an electric Cadillac or Senator sized
car won't work. It'll have to be a small commuter car for it to work.
Dave
|
2214.6 | Sinclair C5+ | ARRODS::SMITHA | Il y a une sange, dans l'arbre | Thu Jan 27 1994 11:04 | 32 |
| Looking at the traffic on the roads at rush-hour I've often thought that the
way to make a killing in the motor industry would be to come up with a practical
commuter vehicle.
For the most part it would only carry one person, but would need to occasionally
carry two.
It would need to give either very high mpg, or be powered by a very cheap
alternative.
For the most part it would only need to do a 50 mile round-trip BUT would need to
be able to do long trips occasionally. I would estimate that the average speed
for a commute is around 50mph, so give it a top speed of 60, but with the
acceleration to match the performance of current 'family' cars (10 sec 0-60).
It would need to be cheap enough to own to be a supplimentary vehicle for a
family.
Now the thing that fills those criteria is a motor-bike, so this 'commute-icle'
would need to be safer (for the driver, not other road-users), and provide the
creature comforts that car drivers want. Give it the same controls and driving
style as a car. Make it fun to drive.
If someone came up with this I'd buy one. As it is I've got a 2CV for schelpping
to-and-fro (cheap, but no fun !) and a Pug 205 for motoring. So where's the
replacement for the tin-snail ?
TKS.
|
2214.7 | | RIOT::gre | Gwyn Evans @IME (769-8108) | Thu Jan 27 1994 12:28 | 6 |
| >Now the thing that fills those criteria is a motor-bike, so this 'commute-icle'
>would need to be safer (for the driver, not other road-users),
Sorry to rat-hole this topic but I'd like to point out that the majority
of motor-bike accidents are caused by other road-users. Bikes themselves
aren't inherently dangerous.
|
2214.8 | C5's big brother? | PEKING::GERRYT | | Thu Jan 27 1994 12:34 | 3 |
| Whatever happened to Sinclair's post C5 prototypes?
Tim
|
2214.9 | | BAHTAT::DODD | | Thu Jan 27 1994 12:43 | 13 |
| I would think that in a few years time there should be scope for a
transport system based on a variant of the channel tunnel. When asked
why they drive for commuting many people answer that they would rather
sit in a car in a traffic jam listening to music/radio, on the phone
etc than in a carriage with 200 other wheezing coughing... commuters.
It seems logical therefore to propose a system wher one drives the
first part of a journey on norma roads then joins a mass transit
system, in the same vehicle. Wheteher this is guided vehicle, or piggy
back doesn't matter.
I don't suggest this is a new idea, but I don't know anywhere that uses
it.
Andrew
|
2214.10 | hasn't this been done ? %^) | WOTVAX::STONEG | Temperature Drop in Downtime Winterland.... | Thu Jan 27 1994 13:11 | 8 |
|
...this sounds familiar, perhaps they could run on rails with
electricity supplied from overhead cables, then the beginning/end of
the journey could be made on foot thereby keeping the population fit
and healthy as well.....
G
|
2214.11 | No matter how you try... | ARRODS::SMITHA | Il y a une sange, dans l'arbre | Thu Jan 27 1994 13:26 | 18 |
| >would need to be safer (for the driver, not other road-users)
>>...........I'd like to point out that the majority of motor-bike accidents
>> are caused by other road-users. Bikes themselves aren't inherently dangerous.
Sorry, thats exactly what I was trying to get across - If other road users didn't
keep wacking bikers around the roads and junctions then bikes would be considered
a lot safer and more people would use them (me included).
Therefore the alternative has to have all the advantages of the bike (cost,
economy, less space on the road) but none of the disadvantages (visibility,
vulnerability in collisions, cold & wet).
T.
(sits back and waits for 'road-user' to rat-hole "...other road users didn't keep
wacking bikers.." wouldn't happen if bikers didn't wear black leathers, weave in
and out of traffic...etc, etc)
|
2214.12 | It has been tried | FUTURS::LONGWY::LEWIS | Imagine being without a Newt | Thu Jan 27 1994 14:49 | 17 |
| S'Obvious, if everybody rode (sorry, drove) this new commuter vehicle,
then there wouldn't be any other dangerous road users.
As for fuel consumption/mileage, the "Feet Forward" totally enclosed
design for bikes has been around for years, and it is perfectly
feasible to build a vehicle which would provide transport for two
people that is capable of 100mph cruising and returning 100mpg. After
all, by totally enclosing the vehicle to protect the occupants from the
elements/other road users, and reducing the frontal area by sitting the
occupants in rather than on the vehicle, you are doing an awful lot to
improve wind resistance, which is the prime cause of high fuel
consumption for modern bikes.
Unfortunately, as all of the pioneers in the last half century have
found, people don't want to buy such a vehicle.
R
|
2214.13 | | OASS::STDBKR::Burden_d | Synchromesh gearboxes are for wimps | Thu Jan 27 1994 14:56 | 9 |
| > Unfortunately, as all of the pioneers in the last half century have
> found, people don't want to buy such a vehicle.
Except in a crisis, like Europe right after WWII. So, until the fuel
situation becomes a *real* crisis, it will be very difficult to get people to
switch to a small commuter vehicle. Then again, government mandates, like
those in California might be the other way to get them on the market.
Dave
|
2214.14 | Depends on how resistant to change one is.. | CGOOA::PITULEY | Ain't technology wonderful? | Thu Jan 27 1994 15:10 | 9 |
|
I dunno 'bout that......If there was a small, *cheap* electric available
that wouldn't do too much damage to my electrical bill I would buy one.
I went out and bought a second gas-powered vehicle to commute in
because a Jag V12 sedan just ain't practical as a "daily driver". An
electric might be just the thing..
Brian
|
2214.15 | | LEMAN::CHEVAUX | Patrick Chevaux @GEO, DTN 821-4150 | Thu Jan 27 1994 15:13 | 27 |
| .5�From what I remember about Californias regulations is that they will be
.5�requiring a certain percentage of cars in the future to emit no pollution.
.5� This percentage increases as the years go on. I can't remember any
.5�details.
I'll dig out the exact details.
From the top of my head, car manufacturers will only be able to sell
'other' cars when 2% (initially) of their annual sales are 0-pollution.
The starting point (I think) is 1998. Rates of 0-pollution vs petrol
cars increase every x years. BTW, this regulation only applies to car
vendors who sell over 35000 cars per year in California. A number of
vendors (Europeans mostly) have concluded that, because they sell less
than 35000 units per year, they were not impacted IN 1998.
It is envisaged that this 'California' regulation will ripple through
the USA, if not by the letter of the law, at least in the spirit of it.
And the Europeans (EU and others) will more or less adopt similar no
pollution views in the near future.
Note: as Dave rightly pointed out, this 0-pollution is only at the
source of it = the individual car. This is replaced by pollution of
making electricity and batteries. However the specialists tell us that
it is (relatively) easy to make a pollution(almost)free production of
electricity those days (nuclear power plants is another story). We're
talking of carbon oxydes and other sorts of pollutants resulting from
incomplete combustion.
|
2214.16 | | LEMAN::CHEVAUX | Patrick Chevaux @GEO, DTN 821-4150 | Thu Jan 27 1994 17:24 | 19 |
| .13�situation becomes a *real* crisis, it will be very difficult to get people to
.13�switch to a small commuter vehicle. Then again, government mandates, like
Fuel situation might not be the real issue. How about pollution in
large cities ?
A number of French large cities are testing free car park (and cheap
recharge rates) for electric vehicles.
The hybrid propulsion vehicles might also be the answer to the 'one car
that does everything' question. Volvo, VW and a few others have presented
some interesting prototypes. The battery powered electric car is
limited to 100-200km between recharges: that's usually enough for many
people who go to work, visit a couple of customers down town and go
back home. Limited top speed is not a problem in most congested city
centres. For longer trips or when the battery shows weaknesses then
the conventional engine is there to take over.
Only problem today: price.
|
2214.17 | 13.5 HP = 10KW approx.... | ROCKS::CAMP | | Thu Jan 27 1994 18:11 | 1 |
|
|
2214.18 | Electric-vs-Renewable | UPROAR::WEIGHTM | Act, Don't React | Thu Jan 27 1994 18:39 | 22 |
| I thought the Californian regs related to reducing the percentage of
fossil fuelled (= non-renewable energy source) cars rather than electric
cars per se. Electric cars could actually be environmentally *more*
damaging than petrol ones; it depends how the electricity is generated.
The _entire_ energy cycle must always be taken into account.
I also believe there is a lot of interest in alcohol-fuelled cars in the
context of the Californian legislation. The idea is to get the alcohol
(e.g. Ethanol, Methanol) from a renewable (agricultural) source. The
resulting exhaust fumes are cleaner than either petrol or diesel exhausts
and the CO2 emissions are a non-issue because it only replaces the CO2
absorbed from the atmosphere in the first place. Well, that's the
theory.
Regarding the 'cars vs bikes' safety rathole (sorry), since safety is
very closely linked to likelyhood of injury, bikes must be less safe than
cars as they afford very little protection in the event of an accident.
Motor accidents are an unfortunate fact of life and, in this context, the
causes are irrelevant. Certainly, when I had a bike it didn't comfort me
to think that most accidents are not the fault of the biker!
Mike
|
2214.19 | | OASS::STDBKR::Burden_d | Synchromesh gearboxes are for wimps | Thu Jan 27 1994 21:09 | 12 |
| 10kw - what does that relate too? How big would the motor be and how many
natteries would it take?
CA regs - Yes, I do believe the California regs don't specifically say they
have to be electric, but just non polluting or something. Maybe a hybrid
electric/solar/propane car would be good (add wings and you've got a good
car for the LA rush hour! :-))
Maybe I'll take one of our engineless Isettas and see what we can do with
it!
Dave
|
2214.20 | Cal regulations | LEMAN::CHEVAUX | Patrick Chevaux @GEO, DTN 821-4150 | Fri Jan 28 1994 08:20 | 27 |
| .19�CA regs - Yes, I do believe the California regs don't specifically say they
.19�have to be electric, but just non polluting or something. Maybe a hybrid
CA regulations brief
1998 Car manufacturer intending to sell more than 35000 cars per
year in the state must sell (or be ready to sell) a number
of ZERO POLLUTION cars equal to or greater than 2% of its total
sales.
2003 Same as above except percentage = 10%
Translation: said car manufacturers must have the product in their price
list, in the plants, in the warehouse ... and probably at a price and with
characteristics that will appeal to customers.
At this point ZERO POLLUTION = ELECTRIC VEHICLE (solar, battery, ?)
The US big 3 have engaged into a very agressive program to meet the 1998
deadline with a lot of joint projects, cross fertilization programs
with electric motor and battery manufacturers. The Japanese have similar
plans but I don't have much detail of these (although the traffic in
some Japanese cities seems a good place to start). European champions
(in US sales) Mercedes, BMW, Volvo and Saab are not targetting 1998 but
2003 rather. While in most European countries there are active plans to
introduce Electric Cars, especially in heavily congested cities like
Paris, Amsterdam, Munich, Milan, Athens, ...
|
2214.21 | More on france | TOMMII::RDAVIES | Amateur Expert | Fri Jan 28 1994 12:26 | 6 |
| RE .16
Auto express had an article last week on the French experiment. They're Pug 205's and
Citroen AX's fitted with an electric system. They've got the economy and comfort, the
range is the only real problem still.
Richard
|
2214.22 | | LEMAN::CHEVAUX | Patrick Chevaux @GEO, DTN 821-4150 | Fri Jan 28 1994 12:55 | 12 |
| Richard,
These 2 cars are a bad example. In the various pilot experiments around
here PSA has tried to stuff their 106-AX things with some mixed success
(people have gladly accepted them as presents but noone would pay for).
In most experiments, the real succesful EVs are the specially designed
ones ie cars made with the battery weight in mind and with the usage
profile well understood. The most succesful EV's (Ligier, Erad, Vesta)
are all basically 2 seaters + some payload, all built out of
lightweight components, etc ... The PSA cars have no future (except
perhaps the AX which is a lightweight).
|
2214.23 | | FORTY2::PALKA | | Fri Jan 28 1994 13:07 | 22 |
| re .19
10kW is a fair sized motor. I think it would be bigger than an
equivalent petrol engine, though not greatly so. A starter motor is
probably about 1kW, though it isn't designed for continuous use or long
life.
A motor that size would be too big to mount in the wheels. I suspect
you couldn't even put a 2.5kW motor in each wheel without radical
rethought of the way a cars suspension system works. It may be too
heavy (too much unsprung weight) to do that as well. (I dont know if
you could do something like the Reliant Robin with an electric motor).
A 10kW motor would drain a typical car battery in a couple of minutes,
so you would need a lot of batteries. But then there are battery
technologies which provide much greater power/weight than conventional
car battery, particularly in larger sizes.
Most electric cars are based on the chassis/transmission/suspension of
existing cars. That is probably not the best way to do it.
Andrew
|
2214.24 | Not 10KW continuously. | ROCKS::CAMP | | Fri Jan 28 1994 14:18 | 7 |
| The 10KW equates to the 13.5HP IC engine. However you would not run the
engine at full power all the time, (though some people try to). Once
upto the speed required the only power needed is to overcome friction, wind
resistance, and any forces as a result of road slope, (though the up loss
should balance the down gain on average in a regenerative system).
So the view of a 10KW motor running flat out all the time is incorrect.
|
2214.25 | 2 seaters only | OASS::STDBKR::Burden_d | Synchromesh gearboxes are for wimps | Fri Jan 28 1994 15:11 | 7 |
| Thanks for the info on the motor size. I definately agree that simply
taking a current small 4 seater and replacing the IC engine with an
electric motor and a pile of batteries is not the way to go.
Make the car for commuting only and they have a chance.
Dave
|
2214.26 | | LEMAN::CHEVAUX | Patrick Chevaux @GEO, DTN 821-4150 | Fri Jan 28 1994 15:42 | 19 |
| .25�Make the car for commuting only and they have a chance.
Right on Dave. Not much a problem in most European cities but I hear
that commuters in the LA region are used to fairly long runs on the
state highways before they reach the city. US EV manufacturers are
therefore looking at better ranges (more batteries, better batteries,
small IC engine for battery recharge, hybrids, ...)
The operational EV's around here (France and neighbourhood) typically
weigh around 600-700kg, they reach a top speed of 80-120kph and have an
operational range of 100-250km. About 20 pilot cities have started to
install public electric recharge stations, mostly in public car parks,
with the active support of EDF (the national power company).
The EV's mentionned above are of the new type, not Renault, PSA, VW,
Fiat, modified for electric batteries + motor. They're mostly used at
this point for public municipal services (power dist, post office,
roads, ...). Certainly the most popular one is the SEER Vesta, which is
a light multi-usage pick-up.
|
2214.27 | | SUBURB::THOMASH | The Devon Dumpling | Mon Jan 31 1994 10:55 | 11 |
|
>>...........I'd like to point out that the majority of motor-bike accidents
>> are caused by other road-users. Bikes themselves aren't inherently dangerous.
Don't be rediculous, of course they are more inherently dangerous.
They are less stable, therefore less likeley to stay upright when hit,
or when encountering dodgey road surfaces (eg oil spill) when
cornering.
Heather
|
2214.28 | | COMICS::FISCHER | Life's a big banana sandwich | Mon Jan 31 1994 12:40 | 2 |
| ...or when the rider cuts you up on the inside, or races
around at well over the speed limit.
|
2214.29 | Shocking.... | CGOOA::PITULEY | Ain't technology wonderful? | Mon Jan 31 1994 16:10 | 5 |
|
Are we talking about *electric* 'bikes here? :-)
Brian
|
2214.30 | Bike Danger Shock Horror | FUTURS::LONGWY::LEWIS | Imagine being without a Newt | Tue Feb 01 1994 12:49 | 9 |
| I used to have a really dangerous electric bike.
A Honda 500-4, which had the plug caps for the two outer cylinders
about 1cm from your knees. Every time it rained it was quite shocking.
Otherwise, bikes are *not* inherently dangerous. I have two of them
parked in my garage, and they have not caused any injury to man or
beast for quite some time now.
Rob
|
2214.31 | | LEMAN::CHEVAUX | Patrick Chevaux @GEO, DTN 821-4150 | Tue Feb 01 1994 14:59 | 25 |
| .23� 10kW is a fair sized motor. I think it would be bigger than an
.23� equivalent petrol engine, though not greatly so. A starter motor is
.23� probably about 1kW, though it isn't designed for continuous use or long
.23� life.
Current EV's available have electric motors in the 10-30kW range. Some
are just mounted like traditional IC engines and drive a gearbox. The
high current is drawn when starting the motor. Manufacturers recommend
to drive those like race cars: ie don't be afraid to pull high revs.
Propotypes are announced with 30kW motors on average.
What's interesting is that the electric motor technologies include all
of the known possibilities today:
- DC motors
- AC asynchronous
- AC synchronous with PM (Permanent magnets)
.23� A motor that size would be too big to mount in the wheels. I suspect
.23� you couldn't even put a 2.5kW motor in each wheel without radical
The solar cars that have completed the last 'world challenge' in
Australia (3000km from Darwin to Adelaide) have electric motors in the
wheels. I'll check what power they were developing
|
2214.32 | fast recharge | OASS::STDBKR::Burden_d | Synchromesh gearboxes are for wimps | Thu Feb 17 1994 14:01 | 16 |
| I'm not sure if the actual numbers for California came up before, but it is
2% of the cars sold starting in (or by?) 1997 have to be non-polluting.
I found an article about an Atlanta based company that has developed a
recharger that supposedly recharges an 'average' electric car (converted
pickup) in about 18 minutes. This pickup has 24 batteries that are the
same type used for backup by telephone companies - what type are those??
This truck ran over 800 miles in a 24 hour period and it averaged 70-90
miles at 35mph per recharge.
They didn't say if the pickup was a full sized or small one, but even a
small one would weigh over 3000lbs. A lighter car would hopefully be able
to drive faster and go longer between 'fillups'.
Dave
|
2214.33 | | LEMAN::CHEVAUX | Patrick Chevaux @GEO, DTN 821-4150 | Fri Feb 18 1994 09:40 | 3 |
| .32�same type used for backup by telephone companies - what type are those??
48 Volts, probably Lead
|
2214.34 | | LEMAN::CHEVAUX | Patrick Chevaux @GEO, DTN 821-4150 | Fri Feb 18 1994 09:42 | 9 |
| .32�I'm not sure if the actual numbers for California came up before, but it is
.32�2% of the cars sold starting in (or by?) 1997 have to be non-polluting.
Dave,
See .20, that's a summary of what I've been digging on the subject.
Any info you have on US developments are most welcome.
Cheers, Patrick
|
2214.35 | Chrysler Patriot project | LEMAN::CHEVAUX | Patrick Chevaux @GEO, DTN 821-4150 | Mon Feb 28 1994 10:41 | 10 |
| Has anyone heard of the Chrysler Patriot project ?
If development goes well this car could race at Le Mans. The car is a
hybrid: rear wheels are powered by an electric motor (triphase async)
which in turn gets power from an alternator coupled with a small
constant speed turbine. The accumulator in between the alternator and
the electric motor is quite interesting: a flywheel spinning up to
100,000 rpm with motor/alternator. Chassis is all carbon fibre made by
same supplier as Bugatti GT cars (I think). Electronics all round to
save energy as much as possible.
|
2214.36 | | WAYOUT::LOAT | Stop throwing those bloody spears! | Mon Feb 28 1994 11:09 | 18 |
|
re .-1
There was a feature in an issue of Autocar a while back about this car.
I can't remember the numbers, but I think it's about 500 bhp output
normally, and if they release the stored energy from the flywheel, the
power goes up to ~750 bhp.
Also, the braking energy produced when slowing down 'charges' the
flywheel. They have worked out that if it were to race at Le Mans, the
energy stored in the flywheel when braking at the end of the Mulsanne
(sp?) straight (~220mph down to whatever speed) would be enough to
drive the car around the circuit twice more, using nothing but the
energy stored in the flywheel!
Steve.
|
2214.37 | more on the Patriot | ASDG::ZETTERLUND | | Mon Feb 28 1994 13:17 | 11 |
| re .-1 .-2
A friend of mine is working on the flywheel and traction motor for the
Patriot (Satcon in Cambridge, MA). The chassis builder is Reynard.
Reynard refuses to allow the braking to be coupled into the drive system,
i.e., no regenerative braking. The turbo-alternator will dump energy
into the flywheel whenever full power is not required. If the car
works, they will have to be very careful not to reveal the true
performance until DURING the race they want to win.
Bjorn
|
2214.38 | gyroscopic effects? | UKARC1::HUDSON | That's what I think | Mon Feb 28 1994 14:16 | 4 |
| If you have a flywheel in the car, doesn't that cause you problems when you
go round corners?
nick
|
2214.39 | | OASS::STDBKR::Burden_d | Synchromesh gearboxes are for wimps | Mon Feb 28 1994 14:25 | 10 |
| >If you have a flywheel in the car, doesn't that cause you problems when you
>go round corners?
I think it should be worded:
-If you have a flywheel in the car, doesn't that cause you problems when you
-*try to* go round corners?
Dave
|
2214.40 | | ERMTRD::BURKE | Nullius secundus | Mon Feb 28 1994 15:07 | 10 |
| If the flywheel is mounted so that it's axis is at 90 deg to the road
surface (ie so that it spins like a rotary lawnmower) there will be no
gyroscopic interference with the steering. In fact this will aid
overall stability and will help prevent the vehicle from rolling over
because the gyroscopic effect tends to prevent any axial tilting.
However, depending on the weight of the flywheel, stamping on the
brakes could prove interesting. Talk about a pirhouette 8-)
Gav$trying_to_sound_technical
|
2214.41 | | WARNUT::ALLEN | It works better if you screw it in.. | Mon Feb 28 1994 15:12 | 6 |
| I wonder what would happen if you put angled slots in the flywheel, and
some vents in the engine cover and had a small electric motor to keep it
spinning? ;-)) Mr Ecclestone (ex Brabham fan car of course) must be
winding up Max already.....
I bet whatever it turns out to be someone will ban it.
|
2214.42 | gyroscope to you too ! | NEWOA::CALF::johnson_n | | Mon Feb 28 1994 15:26 | 27 |
| Humm ..... Gyroscopic precession !
Well - If they have a single flywheel they are in real trouble !
If you move a gyroscope across it's plain of rotation you get
a kick or reaction which is equal (to a first order) to the active
force. That is the action and reaction are equal. However the
reaction is not opposite. It is in fact 90 degrees back against
the direction of the gyro's rotation !
In practise this means that it is impossible to install such a
device in a moving body without very strange things
happening to the way said device reacts to direction control.
So Smart A*** (I here you say) "how do they get away with
this stuff in aircraft using big fans as part of the engine" ?
The answer is that there is almost never one fan, and each pair of
fans rotate in opposite directions to cancel out the gyroscopic effects.
Which is exactly what these folks are going to have to do - e.g.
Twin flywheels rotating in opposite directions.
Regards,
Nick.
|
2214.43 | no electric brakes ? | LEMAN::CHEVAUX | Patrick Chevaux @GEO, DTN 821-4150 | Mon Feb 28 1994 16:02 | 14 |
| .37� A friend of mine is working on the flywheel and traction motor for the
.37� Patriot (Satcon in Cambridge, MA). The chassis builder is Reynard.
.37� Reynard refuses to allow the braking to be coupled into the drive system,
Very interesting. Can we have your friend give a talk on this subject ?
Seriously, this braking problem certainly means that you don't want to
implement this only on the rear axle, probably for stability and safety
reasons.
Now on a pure theoretical level, having a fully electric 4 wheel
braking system that allows maximum braking power on all 4 wheels
whatever the road conditions are ... sounds very exciting. Maybe this
is a little bit remote from reality and from what a "normal" race
driver would like to feel.
|
2214.44 | gyroscopic precession, oh yes | LEMAN::CHEVAUX | Patrick Chevaux @GEO, DTN 821-4150 | Mon Feb 28 1994 16:39 | 16 |
| .42�Well - If they have a single flywheel they are in real trouble !
.42�So Smart A*** (I here you say) "how do they get away with
.42�this stuff in aircraft using big fans as part of the engine" ?
Pilots know what you're refering to ! I've heard lots of stories on
Spitfires and the like which, even with full rudder applied, were able
to point towards the tower when pulling on the stick for take off ...
I've also read of several electric locomotives with vertical motors in
the 30's. Their stability on the tracks was perfect. But as pointed out
they had several motors, not just one.
I'm also aware of a more recent diesel powered light train which stored
energy in a flywheel, allowing it to make quicker starts. I don't know
how it was mounted though.
|
2214.45 | | GEMCIL::PW::winalski | Careful with that AXP, Eugene | Mon Feb 28 1994 19:22 | 6 |
| RE: .35
The Patriot was supposed to race in the IMSA Daytona 24 hour race. Does
anybody know how it did?
--PSW
|
2214.46 | a REAL patriot ? | LEMAN::CHEVAUX | Patrick Chevaux @GEO, DTN 821-4150 | Tue Mar 01 1994 12:42 | 7 |
| .45�The Patriot was supposed to race in the IMSA Daytona 24 hour race. Does
.45�anybody know how it did?
Are you saying that a car was actually built ? I was under the
impression that the whole thing was on the drawing board with a lot of
open issues and that maybe they could manage to get to LeMans this year
but most probably next year ...
|
2214.47 | Patriot for next year | ASDG::ZETTERLUND | | Tue Mar 01 1994 13:17 | 8 |
| re: last two
The Patriot that was shown at the Detroit Auto Show was a mock up; the
chassis was real but not the propulsion system. Several of the major
propulsion components have not been built. The goal is to have the car
ready for next year's Daytona 24hr and/or LeMans.
Bjorn
|
2214.48 | Re.44. Anyone else see this one? | CMOTEC::POWELL | Nostalgia isn't what it used to be, is it? | Tue Mar 01 1994 13:48 | 16 |
|
>>> I'm also aware of a more recent diesel powered light train which stored
>>> energy in a flywheel, allowing it to make quicker starts. I don't know
>>> how it was mounted though.
There was on Tomorrows World a couple or so weeks ago, a working model
of an Electric powered tramway that used a Flywheel powered unit that was "wound
up" by an electric motor that was powered by electricity picked up only at the
stops. So there was no need for overhead cables or under road systems as in the
old London Transport trams.
If I remember correctly, the trams on TW used a form of regenerative
braking too.
Malcolm.
|
2214.49 | Swatch-Car? | OASS::BURDEN_D | and a dozen grey attorneys | Sun Mar 06 1994 04:28 | 6 |
| Saw an article in the newspaper today about the Swatch watch maker SMH.
They have designed a small commuter car which they plan to build with
M-B. They don't say what powers it but they do say it should produce
less pollution than 'conventional cars'.
Dave
|
2214.50 | Time to move on... | MILE::JENKINS | Norfolk enchance | Mon Mar 07 1994 18:31 | 7 |
|
This is presumably the same vehicle that Swatch were planning
to build with VW about a year ago.
VW pulled out when they realised they (VW) were in financial trouble.
Richard.
|
2214.51 | SwatchMobile | LEMAN::CHEVAUX | Patrick Chevaux @GEO, DTN 821-4150 | Tue Mar 08 1994 09:14 | 9 |
| .50� This is presumably the same vehicle that Swatch were planning
.50� to build with VW about a year ago.
Yep, that's the same old SwatchMobile project. Daimler-Benz owns 51%
while SMH has the remaining 49%. There have been some photos published
recently but I would not rely on those since the whole project will
probably be restarted from scratch under the DB management.
Current launch date is 1997.
|
2214.52 | new conf | OASS::BURDEN_D | and a dozen grey attorneys | Fri Jul 29 1994 21:47 | 3 |
| click KP7 to add PATE::ELECTRIC_VEHICLES to your notebook.
Dave
|
2214.53 | Patriot Update | ASDG::ZETTERLUND | | Wed Sep 21 1994 23:34 | 10 |
| Andy Wallace will do the testing of the Reynard-chassied Chrysler
Patriot. Wallace asked the project manager from Satcon if there was
anything he should be aware of about the power unit and was advised not
to hit anything. Other than the usual reasons, why? It turns out that
at the design rotational rate, the energy stored in the flywheel is
equal to four times the kinetic energy the mass of the car would have
travelling at 200 mph! Work seems to be on schedule to begin testing
the car late this fall.
Bjorn
|
2214.54 | Patriot Update II | ASDG::ZETTERLUND | | Fri Nov 04 1994 20:21 | 9 |
| It turns out that Satcon is doing some of the spin testing of the power
unit components for the Patriot at a small facility close to the HLO
plant. I got a tour of the facility (several spin pits with air
compressors, vacuum pumps and instrumentation) at lunch today and
also got my first look at the flywheel (70 lbs of composite material).
The thought of anything going wrong when it's spinning at full design
speed is pretty scary.
Bjorn
|
2214.55 | | AIMTEC::BURDEN_D | A bear in his natural habitat | Tue Jan 31 1995 15:05 | 66 |
| Article 1565 of rec.autos.sport.info:
Newsgroups: rec.autos.sport.info
Path:
netnews.alf.dec.com!crl.dec.com!crl.dec.com!caen!hookup!nic.hookup.net!metrics.c
om!tomh
From: Ivan Berg <[email protected]>
Subject: MISC: FIA Electro-Solar Cup race announced for UK
Approved: [email protected]
Message-ID: <[email protected]>
Sender: [email protected] (Tom Haapanen)
X-Issue-No: 1480
Organization: BBC Top Gear magazine
Date: Sat, 28 Jan 1995 00:32:08 GMT
X-Original-Date: Fri, 27 Jan 1995 15:58:47 +0000
X-Copyright: Copyright 1994 by Motorsport News International and the author
Followup-To: rec.autos.sport.misc
Lines: 46
BBC MOTORING MAGAZINE SPONSORS ALL-ELECTRIC FIA RACE MEETING
BBC Top Gear magazine is sponsoring the first-ever UK round of the FIA
(Federation Internationale de l'Automobile) Electro-Solar World Cup at the
Mallory Park motor racing circuit, near Leicester, England. The event,
taking place over three days, August 26/27/28, is called The BBC Top Gear
World Electric Challenge and is open to vehicles meeting the FIA regulations
in the following classes:
1. Lightweight single-seater electric racing cars under 350 kilos (Karts)
2. Single-seater electric racing cars over 350 kilos
3. Homologated saloon (sedan) cars (i.e., minimum volume manufacture)
4. Electric prototypes (anything goes)
5. Electric motorcycles
The BBC Top Gear Electric Challenge is the first-ever international motor
race meeting for electric vehicles to be held in the UK. There will be an
electric car exhibition and opportunities to ride in the latest electric
production cars.
You'll be able to see the previews and the event itself on BBC Worldwide
TV's news and information channel - available on cable and satellite around
the world.
If you would like to know more about BBC TV motoring programmes and BBC Top
Gear magazine, take a look at the BBC Web pages
<http://www.bbcnc.org.uk/bbctv/>.
We'll be previewing the race meeting on the Web, showing off our
state-of-the-art electric kart; telling you what it's like to drive the
ASMO, the world's fastest production electric racing kart (0-60mph in six
seconds - top speed 103 mph), talking about the electric car scene in
Europe, and putting up race entry details.
Ivan Berg
Associate Editor New Technology
BBC Top Gear magazine
I
Ivan Berg
BBC Top Gear magazine
|
2214.56 | hybrid cars | AIMTEC::BURDEN_D | A bear in his natural habitat | Wed May 10 1995 16:53 | 17 |
| I heard on the radio that California *may* be considering letting a hybrid
electric/gas vehicle qualify as part of the 2% rule for 0 emissions cars.
Apparently the car makers are stating that the technology and markets for
electric cars are just not there. However, some have a basic electric car with
a small (they didn't say how small) gas engine that constantly recharges the
batteries.
This will allow the gas engine to run at a constant speed and the battery takes
up the 'buffering' of power needed to move the vehicle. It would also allow for
a longer driving range.
At least they mentioned the point that an electric car is not really 0
emissions. The electricity to charge the batteries has to come from somewhere,
and that somewhere (a power plant) usually produces pollution, unless it's a
hydro, solar or wind powered station.
Dave
|
2214.57 | | LEMAN::CHEVAUX | Patrick Chevaux @GEO, DTN 821-4150 | Thu May 11 1995 13:39 | 8 |
| I too believe that we'll see hybrids take off in the coming years. The
EV industry has been waiting for a giant step in battery technology but
nothing has come so far ...
France continues to push the EV and the numerous pilot cities, but
we're still talking of cars weighing 1.5 ton to carry 2 to 4 passengers
at up to 75kph on a distance of 50 to 100km between recharges. Not very
useful ...
|
2214.58 | A nit to pick..... | CGOOA::PITULEY | Ain't technology wonderful? | Mon May 15 1995 21:10 | 11 |
|
Re: .56
Actually, hydroelectric power causes pollution too. It adds heat to
the water, noise to the air and visual pollution to nature. On top of
that, the typical hydro development causes flooding over a vast area,
ruining natural beauty and habitat, and causing the displacement of
animals including humans.
Brian Pituley
|
2214.59 | | CBHVAX::CBH | Lager Lout | Mon May 15 1995 22:07 | 5 |
| ...but the argumentative might say that the area, and more besides,
could be damaged by acid rain caused by alternative chemical powered
generators...
Chris.
|
2214.60 | | LARVAE::LINCOLN_J | | Tue May 16 1995 10:52 | 8 |
| Re: .58
> Actually, hydroelectric power causes pollution too. It adds heat to
> the water ...
Removes heat from the water to be precise.
-John
|
2214.61 | Splitting nits..... | CGOOA::PITULEY | Ain't technology wonderful? | Tue May 16 1995 19:16 | 7 |
| Hmmmm.....I have always thought that making something do work would make
it warm up......but you may be right on the "removes heat" bit.....I've
never claimed to be an expert on such matters. Either way it damages
(or at least changes) the environment.
Brian Pituley
|
2214.62 | | CBHVAX::CBH | Lager Lout | Tue May 16 1995 22:10 | 5 |
| I thought that hydro-elecrtics took advantage of potential energy
by reduction is altitude; if anything, the water is heated by the
friction in the process...
Chris.
|
2214.63 | O-level physics | BRUMMY::MARTIN::BELL | Martin Bell, North PSC, Birmingham UK | Wed May 17 1995 11:19 | 14 |
| Yup,
i thought that in Hydro, the water lost potential energy, gaining
kinetic energy (and a little heat due to fiction through the pipes and
slight compression). As it passed through the turbines, most of the
kinetic energy in the water changes to kinetic energy in the blades,
shafts and generators, which produces electricity and heat. Turbulence
etc would also cause more heat energy in the water, and as the
remaining kinetic energy is dispersed as the water hits the bottom
lake, this too is converted to heat.
Or something like that!
mb
|
2214.64 | | RDGE44::ALEUC8 | | Wed May 17 1995 12:31 | 8 |
| making batteries causes pollution too
i believe there is a study whose results are due out soon that
indicates the net effect will be worse
(probably sponsored by an oil company!)
ric$cynic
|
2214.65 | | FORTY2::PALKA | | Mon May 22 1995 18:17 | 9 |
| The water in a hydro scheme is generally going to fall from the high
point down to the low point anyway�, so it would normally be gaining
some heat (and losing some of that to the environment). The hydro
scheme takes away some of that energy, so the water does not get as
warm as it normally would (the temperature gain is low anyway).
Andrew
�except for pumped storage systems, which will usually add some heat to
the environment as they are not 100% efficient.
|
2214.66 | I beg to differ.......... | CGOOA::PITULEY | Ain't technology wonderful? | Tue May 23 1995 22:01 | 29 |
| re: last
Not necessarily so......the drop involved in a hydro project is often
an exageration of the drop that existed in nature. For example, look
at the Hoover Dam in the US or, for that matter, the James Bay
development in Quebec, Canada. In both cases, the drop required to
create a saleable(sp?) amount of power was created by damming up a
river that had a longer series of smaller drops.
In terms of personal experience, I lived in a small town in northern
Quebec that had its own hydro dam. In the lake below the dam, a
species of fish (pike) that likes warmer water was thriving as were various
aquatic plants. In the reservoir above the dam, the plants were much
smaller and the pike were far less numerous and smaller. The lake
below the dam became known throughout the north as *the* place to catch
pike. I personally caught a three foot long specimen when I was about
four feet tall....
In the winter, the ice on the lower lake was never thick enough to walk
on safely while the intake side of the dam was regularly plugged by the
much thicker ice of the colder lake. Really cold winters made for
frequent power outages......clearing the ice from the intakes wasn't a
fun time.
Brian Pituley
|
2214.67 | | FORTY2::PALKA | | Thu May 25 1995 10:52 | 8 |
| re .66
The total release of energy to the environment must have decreased with
the hydro dam. However the energy is now all released at the foot of
the dam, and before the dam was built it was released along the length
of the (now submerged) river bed.
Andrew
|
2214.68 | | RHETT::BURDEN | A bear in his natural habitat | Tue May 27 1997 18:17 | 10 |
| We took the '24 to a local car over the weekend. They had lots of street rods,
a few antiques and some trucks. One of the strangest vehicles there was a
1913 Detroit Electric coupe. It was designed as a woman's car, nicely restored
with a plush interior and a tiller instead of a steering wheel!
It looked like it ran on 24v - it had 4 batteries up front and 4 in the back with
a 24v converter at each end. The motor has 5 'speeds' controlled from a
rotating handle like on a motorcyle.
Dave
|