On 01/12/17 16:24, whisky-dave wrote:
On Friday, 1 December 2017 13:29:33 UTC, The Natural Philosopher
wrote:


flight is all about energy density and power to weight.

which is where the new sodium battereis might come in .

Nope. Lithium air is the only piossible technology that even
theoretically can do te energy desnity




it wasnt; that long ago that drones didnlt exist adn couldn;t be made
with the tech avaiible otherwise they'd have them in WWII V2 was
the closest but hardly stearable remotely.
That hjas nothin g to do with electric fliaght.

Soem probbaly thought it wa simpossible to get to the moom and
others said man couldnt travel faster than the runnikng speed of a horse.
Man cant. Takes a machien.




Electric has the power to wighght , bit not the energy density, not
even in theory.

There are drones which can carry people availble NOW. How do they
work then ?


Dave, stop drinking and listen. Electric flight, carrying passnegers is
completely feasible. For about 30 minutes. MAX

You are muddled in your thinking. You confuse ' things we thought we
couldn't that do we have done' with 'anything is possioble'

Thats because you are a thick addled brain **** who probably doesnt even
have a maths O level.

Ther are things we cant do, that we conceivably might within the laws
of physics, and there are things that we cant do because the laws of
phsyics say so.

Flying passengers with chemical battery technology any commerially
useful distance is simply not possible except with one technologuy.
Lithium air. No opne has managed to make a decent producation calss
lithium air baqttery.

We use lithoum simply because it has the greatest battery potential in
terms of energy per unit weight of any element. there simply are none
better. And no amount of research will change that, any more then any
amount of research will make a windmill that extracts more energy from
the wind than is in it, etc. etc.

In short you are suiffereing from a completel lack of a scientific
education, which leads to lefty****ish 'magic thinking'

6 years ago I said renbbele energy would never work. Now people have
tried it out, and it doesn't work.,

Elkectric aeroplanes for more than sport6 flying will never work
*unless* someone can make a practical lithium air batteryty.

If they can all bets are off and a jumbo jet with electric fans is
entirely possible.





You could sick ducted fans in an airbus and lithium batteries in
the fuel tanks and take off with a full load. But you would only
have the juice for one circuit befiore landing.

How many horses can you get in car ?




--
If I had all the money I've spent on drink...
...I'd spend it on drink.

Sir Henry (at Rawlinson's End)