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Costco evacuation due to fast moving wildfire in Colorado

Traveling Downwind Faster Than Windspeed

Better to be hurt on the ground than die in the air.

Payback says...

That's an odd finding. On the video, it looks like the incoming pilot landed on an apron between two pads. Even if the departing helicopter was centered, that's still awfully close. Sudden gust of wind and it might have happened anyway.

Edit: Ok, I see how the layout is.

https://goo.gl/maps/EnzXgvDf6YHMEj9S7

Seems a screwy setup, to be honest. I note the satellite image shows a chopper parked even worse than the first one in the video.

oritteropo said:

The complete NTSB accident report can be found at http://tiny.cc/helichop

They didn't place all of the blame on the landing pilot, a significant contributing factor was the second helicopter being out of position. That might not have mattered on another day but the landing pilot didn't have good visibility.

2017 Nik Wallenda 8 Person Pyramid Fail In Sarasota

newtboy says...

The difficulty increases....just like if there's a wind gust when they're crossing Niagra. Part of the danger.

ant said:

So what happens if there is an earthquake or something?

Windstorm in the Netherlands

Laura Pausini - Santa Claus llegó a la ciudad

Sonoma And Surrounding Counties Firestorm

newtboy says...

Noon report....
Now at 170000 acres burned. 21 confirmed dead, over 500 missing, and averaging <3% contained across 22 fires, many at 0% in populated areas. Calistoga and surrounding areas are now being evacuated with high winds (35mph with 50 mph gusts) expected.
This is far from over.

Rome is burning....where's Nero?

Helicopter Rescue Accident

SFOGuy says...

Thanks for those insights---so, is NOTAR a bit less efficient in transferring power (ran out of horsepower to correct the yaw because of that?)

Or do you think it was just the gust was so large (the turbulence at a crest could have been ferocious) that it wouldn't have matter what model helicopter or whether it had NOTAR or a regular tail rotor--it simply would have been overmastered?

jimnms said:

It has a fan driven by the main gearbox. It's pretty rare for those to fail, but does spin like it lost control of yaw though. My first thought was since it's landing so close to the edge of that cliff, if the wind is moving from the right to left, there is going to be a big updraft coming over the cliff.

Watching it again, it looks like the pilot is having to fight some wind and seems to be having trouble keeping it down. Between 40-45 seconds, it looks like the wind changes as the helicopter appears to lift up and weather-vane into the wind just before losing control.

I found this video which is in German. If the Google auto-translate isn't too off, it says the cause is still unknown, but whoever they're interviewing at the end speculates that the helicopter was too heavy for the altitude it was operating at.

Helicopter Rescue Accident

SFOGuy says...

What happened? Bad luck with a tail rotor failure? Gust that caught and swung it? Looked like the pilot lost tail rotor authority slowly and it started to rotate and he did the smart thing; grounded it.

or I'm completely wrong.

Man falls Off Motorcycle

HugeJerk says...

Speed Wobbles... aka Tank Slapper. Usually caused by having the steering stem too loose, resulting in no dampening. Then all you need is the right speed and a gust of wind or a shift in your weight to trigger it.

This guy was stupid to continue riding at speed after having experienced the wobbles.

Respect the lee shore and high winds

bamdrew says...

This looks like one overconfident sailor who had planned to bring friends with modest sailing experience out for a day on the water and refused to let high, gusting winds hold him back.

They couldn't control the boat enough to keep the mainsail up in gusty winds, and if they had the boat would likely be leaning and flagging soo far over in choppy seas that the passengers would be right to be scared of the boom taking one of them out. It doesn't look like there is an outboard motor, so I guess they somehow got out of the slip and away from docks on just the jib, then hit the real wind gusts.

And now the video starts with mainsail down and getting in the way, jib not fully up but providing some pull, and that pull being lost to waves and poor steering. The sailor is messing with lines up front while the tiller is manned by someone who is waaay out of their element, and who begins to just jack-knife the thing from 0:20 onwards, halting all forward momentum. I don't want to come down on that person too hard, because none of them should have been out there that day, and the sailor should have been manning the till or at least yelling very specific orders at the top of his lungs well before the situation got this bad. No idea why they don't have an outboard motor, maybe they lost it. If its a rental, that rental agency should not have let them go out there.

(grammar edits)

Mordhaus (Member Profile)

Swedish Chemist's Shop joke

ulysses1904 says...

A Frenchman and a Latino are walking down the sidewalk during a windy day. A woman in a skirt is walking towards them and a gust of wind blows her skirt up to reveal she is wearing no undergarments. She covers herself and blushes. As she passes them the Frenchman shrugs and says to her "C'est la vie".
To which the Latino replies "¡Yo también!"
jajajajajaja

Russian Cargo Ship Loses Cargo of Big Ass Pipes

Payback says...

I was thinking they'd probably be better off laying the load across the ship, although I'm sure there's probably some rule of thumb I'm missing as I've never even knowingly talked to a longshoreman.

I can't see a freighter accelerating or decelerating quickly enough to cause movement like listing through waves. Plus, if you get side gusts, it would cut down on the wind resistance.

bremnet said:

But then again, there's nothing normal about how this load was built, so anything's possible I guess. Cheers.

Microburst Event Causes Planes to Take Off

Babymech says...

From a reddit (fwtw) on the topic :

"I'm very curious as to how you got this video, i was under the impression it never left the airfield.
This happened in April 2014, this past year. The weather is absolute crap here, especially for soaring. Well... we get good weather sometimes. Anyway, it's not uncommon for those TG-16A's to go up with a 25 knot gust... But i digress.
The cadets were pushing in because winds were out of limits and the weather was getting worse... and BAM! Microburst.
This microburst hit right next to the airfield. The tower spotted it early, gave a verbal warning "look out..." and cadets are trained to do the following: grab a wing (glider) and turn broadside into the wind and put the spoilers out. The tows were not so easy... nor lucky. Their takeoff speed is about 50 knots, and none of them were powered up when they lifted off the ground, to give you an idea of how bad the wind was. Their only maneuver is to face into the wind and pray they dont actually take off. The tows that took off left for COS airport... it took another 30 minutes of holding gliders before the tower let the cadets start moving the gliders.
As for taking off... 55 kt gusts are the highest the Academy has had in a long time. Considering there were a half-dozen other aircraft within 100 ft of the tows, along with people (i.e. cadets around/in the gliders) if he was moving too far from his position in the queue, the safest action is to get some altitude and try and leave the microburst. Or at the very least put some altitude and distance in between himself and the cadets and aircraft. You saw how slow the tows in the air were moving relative to the ground... those were HARSH winds.
At about 0:20, you can see a cadet hanging onto the wing of a glider on the bottom of a screen. This wind was scary. I don't know if anyone was up at the time, but full tempo ops can be up to 5 tows and 8 gliders... on a standard afternoon training day 3 tows and 4 or 5 gliders is normal. It looks like they were already pushing the gliders to the hangar..."

eric3579 said:

So are there pilots in any of those tow planes?
(edit)
The little i could find seems to indicate the planes had pilots.



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