taking figures for a 2.3MW turbine, 80m tower, 100m diameter blades
the height above ground levelof the blade tip when at 45 degrees from bottom, is 80 - (50 * sin 45) = 37 meters
feeding v0 = 90m/s, theta = 45, y0 = 37m into a handy trajectory calculator
give a range of 861m (but it ignores drag, so will be overstated).
Absolutely. Not contradicting that at all.
Bloody dangerous, is rotating stuff.
Some interesting stuff on flywheel safety here. They've killed people already.
I'm very curious to see how you'd go about storing energy in plutonium or coal.
Thanks! I didn't know about this. There is so much badly maintained plant in the world, many bombs waiting to go off.
Drag will be very important.
Fascinating. The magnitude of the floods apparently puts the whole dam (and the lives of hundreds of thousands of people downstream) at risk. Regarding the latest accident: "Dam subcontractor Gidroelectroremont's chief accountant has been accused by the Khakassia police of embezzling
24 million rubles from the funds allocated by RusHydro for repairing the dam."Official report summary:
On 3 October 2009 the official report about Sayano-Shushenskaya hydro accident was published. In summary, it states that the accident was primarily caused by vibrations of turbine ? 2 which led to fatigue damage of the mountings of the turbine, including its cover. The report found that at the moment of the accident, the nuts on at least 6 bolts keeping the turbine cover in place were absent. After the accident, 49 found bolts were investigated: 41 had fatigue cracks. On 8 bolts, the fatigue-damaged area exceeded 90% of the total cross-sectional area.
On the day of the accident, turbine ? 2 worked as the plant's power output regulator. At 8:12 the turbine ? 2 output power was reduced by an automatic turbine regulator, and it entered into a powerband unrecommended for the head pressure that day. Shortly afterwards the bolts keeping the turbine ? 2 cover in place were broken. Under water pressure (about 20 atmospheres) the spinning turbine with its cover, rotor and upper parts jumped out of the casing, destroying the machinery hall equipment and building.
Pressurised water immediately flooded the rooms and continued damage to the plant. At the same time, an alarm was received at the power station's main control panel, and the power output fell to zero, resulting in a local blackout. It took 25 minutes to manually close the water gates to the other turbines; during that time they continued to spin without load.
No need. It's there already
Only a matter of time before a windmill kills an innocent dogwalker as well.
You are obsessed with wind power. The risks of wind turbines are of a completely different character from those posed by huge power plants, especially nuclear and hydro.
as in a lot of them about but each only kills one person, as agianst very few of them about that kill no one (nuclear) or a few about that kill shitloads (hydro).
The GPO installed them in 1960s & 70s telephone exchanges. The rotor was installed underground.
What goes around comes around eh ?
Fukushima went bang at least twice, not to mention Chernobyl.
But *not* a nuclear bang, hydrogen.
That was but compared to the damge the burning of coal has done to people and nature, minimal.
He is obsessed/demented,full stop.
In terms of economic cost, nuclear accidents are way out ahead.
well the steam part went bang when it got near the hot zirconium part.
a bag of flour can go bang if you want to be that pedantic.
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