Electric airliner
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Electric airliner
London-Paris electric flight 'in decade' - BBC News
I'm deeply suspicious about almost everything described here.
Apart from the obvious lack of acknowledgement of energy density....
why does it have a v-tail? There seems no good reason for a lack of vertical stabiliser. Why are there huge slots in the leading edge of the wing? that would make the wing more or less useless.
How long would London-Paris take with those weedy little electric engines?
I'm deeply suspicious about almost everything described here.
Apart from the obvious lack of acknowledgement of energy density....
why does it have a v-tail? There seems no good reason for a lack of vertical stabiliser. Why are there huge slots in the leading edge of the wing? that would make the wing more or less useless.
How long would London-Paris take with those weedy little electric engines?
From the article:
"The company is relying heavily on innovation in battery technology continuing to improve at its current rate. If not, the firm will not be able to build in enough power to give the plane the range it needs."
Seems to address the point.
"The company is relying heavily on innovation in battery technology continuing to improve at its current rate. If not, the firm will not be able to build in enough power to give the plane the range it needs."
Seems to address the point.
Electric propulsion makes sense in-flight where relatively little power is used - but not for takeoff. And while storage has a long way to go, using electrically powered hybrid engines may be a longer term solution.
Just look how far electric cars have come in 10 years with little financial/economic pressure and just the green lobby. Now try it with oil in 10 years time over 100 Dollars a barrel......
Just look how far electric cars have come in 10 years with little financial/economic pressure and just the green lobby. Now try it with oil in 10 years time over 100 Dollars a barrel......
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It looks a bit like easyJet and their ecoJET concept from last decade.
And as for batteries. Consider the meltdown that people are having because a few laptops are having to go in the hold.
And as for batteries. Consider the meltdown that people are having because a few laptops are having to go in the hold.
Who remembers the "forked tailed doctor killer"?
https://en.wikipedia.org/wiki/Beechcraft_Bonanza
And the V tail is about the least implausible element in this fantasy.
https://en.wikipedia.org/wiki/Beechcraft_Bonanza
And the V tail is about the least implausible element in this fantasy.
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"The company is relying heavily on innovation in battery technology continuing to improve at its current rate.
And as for batteries. Consider the meltdown that people are having because a few laptops are having to go in the hold.
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A bit like someone in the 1960s saying - "we're expecting the speed of airliners to continue improving at its current rate... so by 2010 we'll be flying around at mach 10"
They might conceivably be able to gain battery breakthroughs by a factor of 10 or so from here to an unknown point in the future, using some nanotube discoveries or whatever, but multiplying battery performance by 10,000 in 20 years seems a bit improbable.
Apart from the fact it would likely have Props and therefor no one would fly on it because it is old there is the Freudien slip that the company is 'HEAVILY' reliable on battery technology. Batteries just that, heavy and unlike jet fuel they do not get lighter as the flight goes on and it burns off so take off weight and landing weight are just the same.
It is a lovely idea and I wish them success but its a real Everest of a mountain to climb even for a 70 seater that can do London-Paris. That would be a very very limited market even in little old Europe where an hour gets you quite along way to be cost effective a short hauler needs three hour endurance minimum for efficient deployment so you can do the likes of London-Berlin, Paris-Milan and in the US if it could not do NY-ATL/ORDits never going anywhere. Economy of scale is everything in the airline world and its very hard to start small and work upwards
It is a lovely idea and I wish them success but its a real Everest of a mountain to climb even for a 70 seater that can do London-Paris. That would be a very very limited market even in little old Europe where an hour gets you quite along way to be cost effective a short hauler needs three hour endurance minimum for efficient deployment so you can do the likes of London-Berlin, Paris-Milan and in the US if it could not do NY-ATL/ORDits never going anywhere. Economy of scale is everything in the airline world and its very hard to start small and work upwards
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Battery technology is improving by about factor of 2 every 10 years, this is far slower than computers 20 years ago.In general, loose comparisons with Moore's Law (about transistors) are never valid, since the underlying principles are unique to information processing, and don't apply to other fields such as batteries.
Usually, the Moore's Law comparison is thrown out as part of marketing hype, designed to impress investors, but has no basis in reality.
Who remembers the "forked tailed doctor killer"?
https://en.wikipedia.org/wiki/Beechcraft_Bonanza
And the V tail is about the least implausible element in this fantasy.
https://en.wikipedia.org/wiki/Beechcraft_Bonanza
And the V tail is about the least implausible element in this fantasy.
But having said that - the "doctor killer" tendency of the V-35 was nothing to do with the "V", and everything to do with the "doctors" IIRC.
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But having said that - the "doctor killer" tendency of the V-35 was nothing to do with the "V", and everything to do with the "doctors" IIRC.
Electric propulsion makes sense in-flight where relatively little power is used - but not for takeoff. And while storage has a long way to go, using electrically powered hybrid engines may be a longer term solution.
Just look how far electric cars have come in 10 years with little financial/economic pressure and just the green lobby. Now try it with oil in 10 years time over 100 Dollars a barrel......
Just look how far electric cars have come in 10 years with little financial/economic pressure and just the green lobby. Now try it with oil in 10 years time over 100 Dollars a barrel......
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what on earth does that have to do with it??
Maybe they'll take the 787 approach and build a huge fire-resistant box around them. Of course, then they'll need more batteries so they can life that weight off the ground.
But even for the Lithium technologies the suggestion doesn't really stand scrutiny. As far as I'm aware every single case of lithium battery fires to date has been able to be traced to one of four things:
1. Damage
2. Abuse (operation, handling or storage not in accordance with specification)
3. Manufacturing defect in the cells or the charging/conditioning system
4. Design error in the battery installation or the charger/conditioner system
As far as I am aware (and I have studied this at some length) there has *never* been an instance where a Lithium battery has caught fire "in normal operation". Subsequent investigations have always found one of causes 1-4 was involved.
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As far as I am aware (and I have studied this at some length) there has *never* been an instance where a Lithium battery has caught fire "in normal operation"
The 787 batteries were in normal operation when they caught fire. The Samsung batteries were in normal operation when they caught fire. That they did so due to design flaws merely reiterates my point that they catch fire in normal operation unless you're very careful with the design.
You're right that this has mostly been a lithium issue so far. But any device that stores a lot of energy in a compact form where it's easy to extract is likely to have disastrous failure modes. We understand the disastrous failure modes of jet fuel. We don't understand the disastrous failure modes of yet-to-be-invented-mega-battery.