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Topic: Weather, Climate, and Environment

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CWSooner

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Re: Weather, Climate, and Environment
« Reply #3220 on: August 01, 2020, 01:10:46 PM »
My senile senior U.S. Senator will turn 86 in November and he still pilots his own plane, so the 3rd-class physical must not be too onerous. He lands at the wrong airport, lands on closed runways, and scares the hell out of anyone foolish enough to ride with him.
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Cincydawg

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Re: Weather, Climate, and Environment
« Reply #3221 on: August 01, 2020, 01:13:55 PM »
 I once landed in a soy bean field, that could be worse than wrong airport, but my options were limited.

We had a club member have a prop strike on landing and didn't notice it.  The tower called him to inquire what happened, he didn't notice.  I had the prop for several years, about 4 inches were bent back (C172).  The engine was checked out OK fortunately.

New props are expensive.

CWSooner

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Re: Weather, Climate, and Environment
« Reply #3222 on: August 01, 2020, 01:41:28 PM »
How nose-low do you have to be to get a prop-strike landing a Cessna 172?

Or maybe he was in a 1000-fpm rate of descent and compressed the nose-gear as far as it would go.

Or both.

Anytime we would have a blade-strike with the main rotor the transmission would have to be torn down and inspected. Doing that cost more than replacing the blade, IIRC.

And when you are flying nap-of-the-earth, blade strikes happen occasionally.
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Cincydawg

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Re: Weather, Climate, and Environment
« Reply #3223 on: August 01, 2020, 03:02:37 PM »
We're taught to land on the mains and keep the nose wheel in the air until it drops normally as speed decreases.  You have to land not only flat, but on the nose gear to strike the prop on the pavement, which is dangerous because of "wheel barrowing" down the runway.  Suffice it to say it's really poor piloting.  You'd fail your practical if you got anywhere remotely close to that, your BFR as well.  I can't imagine anyone on a 1000 fpm decent in a Cessna 172 anywhere near the ground.

The plane didn't have a transmission but the engine had to be torn down and checked for crankshaft issues.

The standard landing pattern is downwind at 1,000' AGL, then crosswind and then turn to final at maybe 500' at about 65 knots air speed.  Line it up, stay lined up, use throttle to control height basically, maybe drop flaps and put the nose down at that point and then flare out over the threshhold.

Maybe he had the nose down with flaps and didn't flare properly, you feel like you are vertical with flaps down.

CWSooner

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Re: Weather, Climate, and Environment
« Reply #3224 on: August 01, 2020, 04:12:03 PM »
I've got 3-4 hours in Cessna 152s, so I know what you're talking about on approach with the flaps down.  In a helicopter, you are descending and decelerating at the same time, so you're nose-up on final approach.  In the 152, it felt as if I were diving to my death.
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Cincydawg

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Re: Weather, Climate, and Environment
« Reply #3225 on: August 01, 2020, 05:11:30 PM »
Yeah, it's an odd feeling at first, and if you see you are short, you don't go nose up, you add power, which is counter intuitive.  But it works, amazingly well.

I took my flight test in a C152, I really liked flying that plane.  That's the one that quit on me.

CWSooner

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Re: Weather, Climate, and Environment
« Reply #3226 on: August 01, 2020, 06:23:29 PM »
One of the things we did in Apaches was practice run-on landings as an emergency procedure in case of tail-rotor failure.  It was a shallower, flatter, more-level approach than a normal one.  Different from a normal helicopter approach, but still not the "dive" of a small airplane with flaps down.
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FearlessF

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Re: Weather, Climate, and Environment
« Reply #3227 on: August 01, 2020, 07:44:36 PM »
The world’s largest experimental nuclear fusion project, one which may find a way to secure our energy needs in the future, achieved a key milestone recently.

On 28 July, a celebratory occasion marked the start of assembling major components that make up the fusion device.


https://swarajyamag.com/science/iter-the-bumpy-road-to-building-worlds-largest-fusion-reactor-and-indias-role-in-mega-project
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Cincydawg

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Re: Weather, Climate, and Environment
« Reply #3228 on: August 01, 2020, 11:17:18 PM »
Maybe by 2070, maybe, probably later.

FearlessF

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Re: Weather, Climate, and Environment
« Reply #3229 on: August 02, 2020, 08:11:27 AM »
by then it's too late and the world has come to an end
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Cincydawg

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Re: Weather, Climate, and Environment
« Reply #3230 on: August 02, 2020, 08:32:32 AM »
I read several articles on ITER that laid out a rather daunting forecast, based on their own timing.  The hope to get to break even continuously by 2035, and perhaps have enough to start construction of a pilot power plant, this isn't a power plant now, it's a test bed, by 2050, and then if all goes well they could start a power reactor by perhaps 2060, maybe.

FearlessF

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Re: Weather, Climate, and Environment
« Reply #3231 on: August 02, 2020, 08:39:14 AM »
Let's imagine an analysis that shows the following as facts.

1.  Climate change is real and going to be dire.
2.  The only way to prevent this is a crash program to product electricity globally using nuclear fission reactors.  (Wind and solar can help to the extent possible, but we can't get to the goal fast enough.)

If those were accepted as facts, and there was not alternative, would you support Item 2 as a viable approach?

This is a hypothetical, if you want to claim these are not facts, fine with me.
so, can we get there fast enough with nuclear fission?
Wondering how quickly enough reactors could be built and on-line in 10 years?
how many would be enough?  (1000)  
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Cincydawg

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Re: Weather, Climate, and Environment
« Reply #3232 on: August 02, 2020, 09:11:24 AM »
It would have to be a crash program, government financed, standardized reactor design, etc. (which is not going to happen).

We'd need in the US about 40 nuclear plants to replace coal (give or take).  You'd have to annihilate red tape.  And that only replaces coal (which would be a something).

We'd still have NG to replace, at least it's cleaner burning (less CO2 and NOx and SOx).  Replacing NG on the grid would be tough as it has advantages in start up and shut down times, but you could perhaps replace half of it, so maybe 100 power plants with 2-3-4 reactors each in ten years.  

Yes, it is technically doable, in the US anyway.  The impact on climate change would be marginal of course, maybe a tenth of a degree.  

If you couple this with a huge push to EVs like Norway has done, you might cut automobile CO2 in half or so by 2030.  This really highlights how tough this problem is when you cut to the chase.

847badgerfan

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Re: Weather, Climate, and Environment
« Reply #3233 on: August 02, 2020, 12:35:04 PM »
Lip service is all we will get. No plans. Just bullshit.
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