* Posts by Adalat

8 posts • joined 30 Jan 2012

Tesla, Nissan, BMW mull all-for-plug, plug-for-all electrocar charger plan

Adalat

Re: Electric car batteries don't "swap"

Ok, I'm wrong. And this is how it works:

http://www.forbes.com/sites/pikeresearch/2013/06/27/tesla-tries-out-battery-swapping/

"...Ideally, the [Tesla] Model S owner will return to the station and retrieve the original battery pack when finished with the replacement pack, once again paying the service fee [currently about $60 to $80]. The owner may choose not to go to the station and have the older pack delivered to them for a fee, or choose to simply keep the replacement pack and Tesla will submit a bill for the value difference of the battery pack based on its age."

And you do this every week, right? And you live handy to a Tesla Station? Or Tesla and BMW and Nissan will have interchangeable batteries?

But hey, why don't you keep a spare battery pack at home and swap it whenever it suits you (but did they mention that it weighs 544kg? see http://www.roperld.com/science/TeslaModelS.htm )

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Adalat

Electric car batteries don't "swap"

Why are we talking about battery swapping? Quoting Wikipedia on the Nissan Leaf for example "…the battery and control module together weigh 300 kilograms…" Batteries are built in to a car body (not the boot) with particular attention to weight distribution. They can't be "swapped" even with a forklift.

Notwithstanding all that, I do see a market for a portable and interchangeable small battery pack of maybe 15kg for emergency use to get you home, or to the nearest charging station. A stuck driver might call an RAC van to deliver a loan or leased battery (or two). To make such a service work needs a connector in the car boot, with standardised plug and voltage settings. Would be handy if more than one could be run in parallel, if only to keep the individual package weight manageable, so each battery pack would need an input and an output connection to make a daisy-chain. Car makers should seriously consider keeping that option open.

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Techies with Asperger's? Yes, we are a little different...

Adalat

No need to see it as a problem.

Stuart, may I suggest that you don't have to "medicalise" your condition, unless you choose to. I am retired now but I recognize in myself and my early career that I was a classic example of Aspergers Syndrome long before the term was invented. My employers observed that I was better suited to some tasks than others, and I could see that was a fair assessment. I got on with my job and the boss was happy to keep me there. Diagnosing problems and thinking up treatments that might fix them is only a modern habit, decades ago we just worked around individual characteristics and they weren't regarded as problems, just "different strokes for different blokes".

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Under cap-and-trade, flying is greener than taking the bus

Adalat

This is a highly academic re-statement of the bleeding obvious. Individually reducing emissions under a "cap and trade" system might save you money but does nothing to reduce total emissions if someone else fills in the space you create. And Australia's carbon tax is just as leaky. We tax the electricity that trains and trams use, but exempt the petroleum fuels that cars use... tell me again, why are we doing this?

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Adalat

And your problem is...?

"...For a typical cross-country flight in a commercial airplane, you are likely to receive 2 to 5 millirem (mrem) of radiation, less than half the radiation dose you receive from a chest x-ray. People in the United States receive an average of 360 mrem of radiation per year from natural and man-made radiation sources, which includes cosmic radiation exposure during commercial flights. "

http://www.epa.gov/radtown/cosmic.html

I wonder how this compares with the x-ray scanners?

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Europe's prang-phone-in-every-car to cost €5m per life saved

Adalat

My main concern is the emergency services and call centre time wasted on false positives. Bearing in mind that all the call centre knows is "something happened", and then have to figure out what, where, whether anyone was injured, match this call with bystander calls that might or might not be about the same accident, and whether to divert an ambulance that happens to be a block away on another job. Cost to install the hardware is only the start. By the way will tow truck drivers be notified?

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US Senator: 'Retest airport scanner safety'

Adalat

And your problem is...?

"...For a typical cross-country flight in a commercial airplane, you are likely to receive 2 to 5 millirem (mrem) of radiation, less than half the radiation dose you receive from a chest x-ray. People in the United States receive an average of 360 mrem of radiation per year from natural and man-made radiation sources, which includes cosmic radiation exposure during commercial flights. "

http://www.epa.gov/radtown/cosmic.html

I wonder how this compares with the x-ray scanners?

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SpaceShipOne man, Nobel boffins: DON'T PANIC on global warming

Adalat
Holmes

It is not science to quote sixteen opinions, however well qualified (or not). What research have these people done that supports their argument, and where is it published?

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