CTRL + V!
SubscriberDidn't think I would see any thing worse than Darwin after Tracy. How anyone survived this tornado is beyond me.
Dozens Dead After 'Most Severe Tornado Event In Kentucky's History' | NPR - YouTube
I’m pretty sure the dinosaurs died out when they stopped gathering food and started having meetings to discuss gathering food
A bookshop is one of the only pieces of evidence we have that people are still thinking
LordRover
SubscriberMain reason people survive is that tornadoes. while furiously powerful, are really quite localised, unlike cyclones. I once saw a pic in National Geographic that showed the path of one through a town. It looked as if someone had steered a path driving a 100 meter wide combine harvester. Everything in its path totally destroyed, everything else virtually untouched. Scary damn things.Originally Posted by bob10
JayTee
Nullus Anxietus
Cancer is gender blind.
2000 D2 TD5 Auto: Tins
1994 D1 300TDi Manual: Dave
1980 SIII Petrol Tray: Doris
OKApotamus #74
Nanocom, D2 TD5 only.
ForumSage
SubscriberNatures pretty awesome isn't it, just imagine if there hadn't been all that crap put there by humans, a few trees in the forest gone and a swathe of cleared land. Looking at most of those houses and knowing the construction techniques used in the US it isn't surprising. The centre of that town took a battering but those old brick buildings are probably over 100 years old with rusty ties (not) holding the masonry together.
Regards,
Tote
Go home, your igloo is on fire....
2014 Chile Red L494 RRS Autobiography Supercharged
MY2016 Aintree Green Defender 130 Cab Chassis
1957 Series 1 107 ute - In pieces
1974 F250 Highboy - Very rusty project
Assorted Falcons and Jeeps.....
RoverLord
We had a severe tornado about 25 years ago, fortunately missing the house. (One about fifteen years ago didn't but was far milder).
You could see the track of it on the satellite pictures for years, and I'm still using the firewood!
John
JDNSW
1986 110 County 3.9 diesel
1970 2a 109 2.25 petrol
Cynical Moi?
Also Tote, after a century mortar joints would be weakened so making it easy for those walls to be pulled apart.
CTRL + V!
SubscriberMate , the winds were over 300 kmh. And that particular tornado was on the ground for 350 miles. A lot of those houses were not that old , it would be like trying to survive a nuclear burst. Horrifying.
I’m pretty sure the dinosaurs died out when they stopped gathering food and started having meetings to discuss gathering food
A bookshop is one of the only pieces of evidence we have that people are still thinking
LordRover
SubscriberIt's why all houses etc in the tornado belt have mandatory tornado shelters underground. Folk there know the destructive force of even an F2 twister. This thing was F5. In the movie Twister they describe F5 as "the Finger of God". If you get in its way...., well, don't get in its way. An F5 tornado is one of the most destructive natural forces on the planet. Luckily they are 'localised', rather than a cyclone/hurricane, earthquake or tsunami.
JayTee
Nullus Anxietus
Cancer is gender blind.
2000 D2 TD5 Auto: Tins
1994 D1 300TDi Manual: Dave
1980 SIII Petrol Tray: Doris
OKApotamus #74
Nanocom, D2 TD5 only.
OldBushie
SubscriberDidn't Monkey urinate on that?
'sit bonum tempora volvunt'
LordRover
SubscriberAs in Magic? Possibly. The Librarian probably did.
JayTee
Nullus Anxietus
Cancer is gender blind.
2000 D2 TD5 Auto: Tins
1994 D1 300TDi Manual: Dave
1980 SIII Petrol Tray: Doris
OKApotamus #74
Nanocom, D2 TD5 only.
Super Moderator
SupporterThe power in a wind is expressed as 0.5*air density*area*velocity cubed. Power in the wind from this equation is expressed in Watts (W).
Rho is air density at the location at the time of the incident wind.
Area is usually expressed as 1 square metre if discussing power density per sq m. If discussing power able to be exerted on an object... say a building, it would be the square metres of wall area receiving the full wind.
Velocity cubed is the kicker here. It is expressed as metres per second (divide kph by 3.6). As wind speed is cubed it is an exponential function and therefore small increases in speed equals increasingly larger increases in power.
Assume air density is 1.2 kg/m^3
Assume a vertical surface (e.g. a house wall 8m long and 3m high) = 24 sq m.
The wind was supposedly running at 190 mph = ~306kph = ~85m/s (Tornado Damage Survey Summaries)
0.5*1.2*24*(85*85*85) = 8,843,400W = 8,843kW = approx 11,859 US Horsepower in the wind at 306kph against a 24 sq m wall. As a power density it is ~368kW per sq m.
This is just a raw empirical figure of possible power available in a wind of that speed. Throw in debris and you have a giant grit-blaster/jack hammer/grinder.
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