On Friday, 1 December 2017 13:29:33 UTC, The Natural Philosopher wrote:
On 01/12/17 13:06, whisky-dave wrote:
On Thursday, 30 November 2017 21:04:53 UTC, Rod Speed wrote:
"whisky-dave" wrote in message
...
On Wednesday, 29 November 2017 18:48:26 UTC, The Natural Philosopher
wrote:
On 29/11/17 17:02, whisky-dave wrote:
On Wednesday, 29 November 2017 16:54:32 UTC, harry wrote:
https://www.express.co.uk/finance/ci...-Royce-Siemens

Well if drone can fly by battery power why can't planes eventually run
on batteries.

They already can. Just not for very long

Solar Impulse 2, did OK

Pity about the number of pax it can carry. Like none, zero, nada, ziltch.

How many pax could the wright brothers plane carry ?


flight is all about energy density and power to weight.

which is where the new sodium battereis might come in .

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.
Soem probbaly thought it wa simpossible to get to the moom and others said man couldn;t travel faster than the runnikng speed of a horse.




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 ?


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 ?