On 02/12/2017 09:26, charles wrote:
In article ,
Rod Speed wrote:


"whisky-dave" wrote in message
...
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 .

Nope, nothing even remotely like the energy capacity
as the wings of an A380 or Dreamliner full of avgas.

it wasnt; that long ago that drones didnlt exist

Something like 80 years in fact.

adn couldn;t be made with the tech avaiible otherwise
they'd have them in WWII V2 was the closest

Nope, the V1 was.

It wasn't a drone - it was an unguided weapon. Drones are controlled from
the ground.


Of course the Germans did have guided weapons during WW2.

The allies also had some, one was a bomber that was radio controlled and
was loaded with explosives with the intention of crashing it into the
target. It failed as it exploded early and killed a Kennedy who was
piloting it for takeoff and was supposed to bail once it was in the air.