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Old 06-24-2019, 02:32 PM   #6051 (permalink)
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"While some may have the impression that renewables account for a large share of global energy consumption, their total contribution in fact remains small. Even if we include modern biofuels and hydropower, it is still less than five percent."
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Old 06-24-2019, 02:45 PM   #6052 (permalink)
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Quote:
Originally Posted by NeilBlanchard View Post
...the Arctic is about 40F warmer than it used to be.
Define, "used to be".

The sources I'm finding say the Arctic has warmed 3.6 F over the past 50 years. Is the other 36.4 degrees considered from the coldest period of the ice age?

It's hyperbole that gives deniers ammunition against a threat which may have credibility.

People are entitled to their own opinions, but they aren't entitled to their own facts.
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Old 06-24-2019, 03:14 PM   #6053 (permalink)
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That would be perfect. It provides redundancy too so if there's an issue with the currently installed battery, you can swap it out relatively quickly.

One question I've always had is why prop planes don't have shrouds? As I understand it, shrouds increase efficiency.
The other beauty in having electric aircraft is that electric motors are much less prone to sudden unexpected failure than an ICE. With how seldom we see catastrophic engine failure in aircraft as is, with electric I think it would be near zero.

The fact that we don't see more failures is a testament to the engineering and maintenance of aircraft, as ICE are incredibly complex, picky, and delicate machines when it comes right down to it.
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Old 06-24-2019, 04:18 PM   #6054 (permalink)
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But the sun doesn't effect climate. Lol
Nobody has claimed it doesn't.
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Old 06-24-2019, 04:31 PM   #6055 (permalink)
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I'm sure there's many benefits to electric motors over turboprop, or turbofan, including reliability. Conventional engines have a more narrow range to operate efficiently, for instance. Electric motors are pretty efficient throughout the load range. Commercial aircraft have a RAT (ram air turbine) to generate electricity when engines fail, whereas an electric engine can also act as a generator if there were a sudden loss of power. No need for a RAT.

I wonder if the engines can help torque vector too. Rather than rely entirely on a rudder to turn, you could reduce power on one wing and increase power on the other. Maybe that was factored into the V tail design; which integrates the rudder and elevator functions.
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Old 06-24-2019, 04:36 PM   #6056 (permalink)
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Quote:
Originally Posted by NeilBlanchard View Post
Nobody has claimed it doesn't.
I've heard a number of climate change alarmists make exactly that claim, or that it has an 'insignificant' impact on our climate.

Someone in this thread even I believe said the sun has less than 5% impact on our climate.

The idea is nonsense on its face, as virtually 100% of the energy driving our climate is solar in origin, the little bit of heat coming from the Earth's core is quite minimal compared to that, else Mars would be a green paradise just as Earth is.
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Old 06-25-2019, 07:22 AM   #6057 (permalink)
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Yes the sun does generate most of the heat and without it life on earth would not be possible. The sun is a given.
What matters for this discussion is whether variations in solar activity cause climate change, and more specific, whether the current changes are caused by it rather than by human activities.

Most people who blame human activity for climate change will point out that the changes in solar activity are too small to cause this effect and that our more than doubling the carbon dioxide content, as well as other human generated greenhouse gases, are the motor behind current changes.

That is not the same as saying variations in solar activity have no effect on climate at all. They very well may have an effect and may have caused changes in the past.
The current changes however cannot be adequately linked to solar activity.
When a lull in sunspots coincides with a regional change in the weather but the effect elsewhere was inverse then it should be clear to all the effects are coincidental instead of causal.
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Old 06-25-2019, 08:49 AM   #6058 (permalink)
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Quote:
Originally Posted by RedDevil View Post
Yes the sun does generate most of the heat and without it life on earth would not be possible. The sun is a given.
What matters for this discussion is whether variations in solar activity cause climate change, and more specific, whether the current changes are caused by it rather than by human activities.

Most people who blame human activity for climate change will point out that the changes in solar activity are too small to cause this effect and that our more than doubling the carbon dioxide content, as well as other human generated greenhouse gases, are the motor behind current changes.

That is not the same as saying variations in solar activity have no effect on climate at all. They very well may have an effect and may have caused changes in the past.
The current changes however cannot be adequately linked to solar activity.
When a lull in sunspots coincides with a regional change in the weather but the effect elsewhere was inverse then it should be clear to all the effects are coincidental instead of causal.
The same people who are saying this stuff though are the ones who predicted a new ice age by the 90's, no more ozone by the 2000's, no ice caps by 2013, etc, etc.

Big name climate change alarmists flip flop on their story more than a fish thrown on the dock.
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Old 06-25-2019, 08:59 AM   #6059 (permalink)
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The same people... THEM, you mean?

I have not personally inspected them so I cannot be sure they are the same.
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Old 06-25-2019, 10:34 AM   #6060 (permalink)
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Quote:
Originally Posted by RedDevil
When a lull in sunspots coincides with a regional change in the weather but the effect elsewhere was inverse then it should be clear to all the effects are coincidental instead of causal.
It's not clear to me. Ignoring causality, if all regions are affected (one way or the other) that strains coincidentality.

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