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Solar Impulse

Old 17th Jun 2016, 00:35
  #61 (permalink)  
 
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Not the same thing. Sunlight converted to electricity doesn't have enough energy density to make this "fuel" viable......... EVER.
You might want to let Airbus know then that they are wasting their time.
Zephyr ? unmanned aircraft system UAS

the problem with that is LEO satellites are getting much cheaper every month as are the launch costs, to the point SpaceX are already looking to launch their own LEO constellation for net connectivity (the way they are heading is looking like they could put up enough in 2 launches to cover the planet).

in reality, the number of planes/blimps/whatever to do this job would simply be far to expensive and have too high a running costs for anything practical.
Whilst you are correct that launch costs are still declining rapidly. Its no where close to being cheaper, especially when you take the ground segment into account. Fundamentally its far harder to address most of the intended applications from 300+KM altitude than from 10-25KM in the stratosphere
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Old 17th Jun 2016, 13:06
  #62 (permalink)  
 
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@ion berkley

While long endurance solar cell powered flights in the stratosphere by Helios NASA - Helios and Zephyr Zephyr ? unmanned aircraft system UAS type aircraft are demonstrably feasible - although not validated by extended flight. There are also any number of UAS that are battery powered both commercial and toys. The implications from the media releases that in a few years South West and Easyjet can be expected to be flying pax on all electric aircraft is completely false. Solar impulse like Gossamer Albatross only shows that there may be niche uses. The amount of energy for powered flight has not altered so the energy density has to be sufficient. Currently there is no battery or electrical generation system that provides anything close to hydrocarbon fuel energy densities which exceed battery capabilities by several orders of magnitude.
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Old 20th Jun 2016, 16:36
  #63 (permalink)  
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Heading for Seville. Solar Impulse - 15th Leg from New York to Seville

The Atlantic Crossing
Another multiple-day flight is on its way over the Atlantic Ocean. Bertrand Piccard will be making this first transatlantic solar and electric crossing with zero fuel and zero emissions.
The flight will last between approximately 90 hours and 110 hours, representing the longest distance we have had to fly this year. He took off at 6:30AM UTC, 8:30AM CET and 2:30AM EDT on June 20th from JFK in New York and will be landing in Seville Airport over three days later.
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Old 21st Jun 2016, 10:21
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braver man than me for sure...................
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Old 22nd Jun 2016, 22:36
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Doing well. Close to the Iberian peninsula now.
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Old 23rd Jun 2016, 07:29
  #66 (permalink)  
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Flight Time 2d 23h 56m 4s
Distance 6272 km (100 %)
Altitude 278 ft (85 m)

They had hoped for Le Bourget, but as any football fan knows, France covered by storms.
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Old 23rd Jun 2016, 07:49
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https://www.periscope.tv/w/ajor2DFET...34sYfeko3j3SFq

Replay of the landing as broadcast live on periscope, from the ground crew on the tarmac.

Mickjoebill
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Old 24th Jul 2016, 07:12
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Now en route CAI - AUH


Expected to take about 48 hours. Great achievement -if it makes it - but slightly clouded in my view by the cooked batteries which had to be replaced.
Still round-the-world on solar power alone is quite something.
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Old 24th Jul 2016, 07:55
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https://www.solarimpulse.com/leg-17-...o-to-Abu_Dhabi

It's an impressive achievement. Good luck to them with the Arabian heat.

Last edited by mutt; 24th Jul 2016 at 13:13.
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Old 24th Jul 2016, 14:27
  #70 (permalink)  
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My goodness >30kts at 30,000 feet.
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Old 24th Jul 2016, 22:31
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They were doing 25 kts in the climb to that altitude. Impressive wing design.

Their flight planning was quite intriguing, takeoff at dawn to avoid temperature and winds. Hold off the coast of Saudi for a number of hours during the hottest part of the day, therefore avoiding extremely unpleasant temperatures and thermals.

Looking forward to seeing them complete the journey tomorrow.
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Old 26th Jul 2016, 05:26
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Talking completed flight

approx 4 am local time
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Old 26th Jul 2016, 06:13
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Safely down at Al Bateen Executive Airport, downtown Abu Dhabi. (Not at AUH).
Great achievement. Hadn't appreciated it's unpressurised so 30,000 ft is even more impressive.
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Old 26th Jul 2016, 09:33
  #74 (permalink)  
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Wonder what Picard's next project will be ...
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Old 26th Jul 2016, 09:42
  #75 (permalink)  
 
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yes - well done - some impressive engineering and flight planning !!!
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Old 26th Jul 2016, 11:02
  #76 (permalink)  
 
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er...maybe a couple of you missed the point. Experimental and Pioneering it was... bringing together and building a team capable of utilizing renewable energy to accomplish something that has NEVER been done before. Flying Round the WORLD using absolutely NO (Fossil) FUEL !! Now how much did that cab cost the other day back to the airport?? Tesla would be pleased... and so am I. Well done to ALL who played their part in the team.
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Old 26th Jul 2016, 12:40
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Originally Posted by ExXB View Post
Wonder what Picard's next project will be ...
Most intresting question. And obviously what has been learned.

But for now congratulations are in order!
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Old 26th Jul 2016, 14:25
  #78 (permalink)  
 
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So, just to put this in context, a massively expensive Solar plane takes months to do the job a Russian dude has managed in 11 days in a balloon.

Russian priest breaks round-the-world ballooning record | Australasia | News | The Independent
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Old 26th Jul 2016, 17:51
  #79 (permalink)  
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That guy didn't do anything close to the kms that the Solar Impulse did. "Round the World"? No, I think it's Round the Southern Hemisphere".
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Old 27th Jul 2016, 06:57
  #80 (permalink)  
 
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Hi,

Flying Round the WORLD using absolutely NO (Fossil) FUEL !!
Fot the flight only yes .. but this flying was impossible if not a crew at each stop point .. and those used a big amount of fossil fuel
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