On Why the D850 is Revolutionary

Started 11 months ago | Discussions thread
Tord S Eriksson
Tord S Eriksson Veteran Member • Posts: 9,906
Re: On Why the D850 is Revolutionary

bobn2 wrote:

david vella wrote:

bobn2 wrote:

david vella wrote:

Iain G Foulds wrote:

... David: To repost-

... If a new model of car came out, and it was 30% faster with 30% better gas mileage, and a long list of serious innovations and upgrades, it would unanimously be considered a revolution. But, apparently, not with cameras...

No it would not . It would be a good EVolutionary improvement .

To be revolutionary requires major disruption of the market such as digital v film and smartphones v low end digital cameras .

Not sure. Disruptive products are often evolutionary, they just hit a sweet spot at the right time. Think of the iPhone, didn't really do anything that a 'personal organiser' didn't do, just did it in a more nicely presented way, in a more convenient package.

Really ??

You had personal organiser that could shoot stills and video , transmit TV and Radio , store music, share information and offer FaceTime ?

Pray tell, who made it ?

https://en.wikipedia.org/wiki/Personal_digital_assistant

Nearly all PDAs have the ability to connect to the Internet. A PDA has an electronic visual display, letting it include a web browser. All models also have audio capabilities, allowing usage as a portable media player, and also enabling most of them to be used as mobile phones. Most PDAs can access the Internet, intranets or extranets via Wi-Fi or Wireless Wide Area Networks. Most PDAs employ touchscreen technology.

Several had cameras, and so could record stills and video:

For instance

http://www.mobiletechreview.com/viewsonic_V36.htm

In motoring terms Tesla are near revolutionary , but if their vehicles were to run on two AA batteries, do 500 miles per set , and cost the same as conventional engined transport , now that would be a motoring / personal transport revolution .

As well as an impossibility.

Impossible today yes , but in the future who knows .

Unless someone changes the laws of thermodynamics to suit, yes, an impossibility.

Did you think a conventional 60 watt light bulb could be replaced by one with the same light output but consumed less that one tenth the wattage ?

Doing 500 miles on two AA batteries is a different order of things altogether. Let's assume you can make a drive system with 100% efficiency (which is tricky, because you'd need frictionless wheels, and frictionless wheels aren't very good at providing any forward impulse). You'd also need a drag coefficient of 0, which is testing, aerodynamically, but let's say some revolutionary advance has achieved it. Two top-notch AA batteries would give about 2.5AH at 3V. That's 27kJ.

Now, let's assume a car with a mass of 500kg, Let's assume that we'll make the journey on a perfectly straight, flat road. What we'll do is use all the energy to accelerate, use our frictionless wheels and perfect aerodynamics to travel as far as we want, then use perfect regenerative braking (notwithstanding the fact the our frictionless wheels can't brake in the first place) to recharge the AA batteries. So, we'll transfer all of the battery energy to kinetic energy. That will result in a velocity of sqrt(54,000/500), about 10m/s or 22mph. The average speed will be half this, 11 mph, so your 500 miles will take you 45 hours, assuming that you can find frictionless wheels capable of providing tractive effort, which is of course impossible. Also, aerodynamic design that gives a zero drag coefficient, also impossible.

Innovation isn't about just thinking what might be 'revolutionary'. it's also about doing it.

But things have moved along amazingly, already! Consider the fuel-hungry aircraft of yesterday, compared with those around us today, which use less than a third of the fuel used just a couple of decades ago, and a similar huge decrease in fuel consumption is possible in the future.

But not right now !

Airbus is already designing battery-powered passenger aircraft, but how good they eventually will be is yet unknown.

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