More offshore wind construction pictures | 36 comments (36 topical, editorial, 0 hidden)

Re: weights (none / 1)

Max take-off weight for an A380 is 560 tonnes. Standard offshore machines are heavier, but direct drive and hybrid can be lighter.

The Areva M5000-135 (rotor dia. 135m) THM is only 375t.

"Life shrinks or expands in proportion to one's courage." - Anaïs Nin

by Crazy Horse on Tue Jun 25th, 2013 at 10:34:57 AM EST
[ Parent ]

Yes but... (none / 0)

as the picture implies, can the A380 fly through the swept zone without getting hit by a blade? At what airspeed, at what windspeed? Gentlemen, start your slide rules.

_{It is rightly acknowledged that people of faith have no monopoly of virtue
- Queen Elizabeth II}

by eurogreen on Tue Jun 25th, 2013 at 10:49:32 AM EST
[ Parent ]

Re: Yes but... (none / 0)

A new 007 (or Snowden?) movie, "Wind farms forever"!

by das monde on Tue Jun 25th, 2013 at 11:18:08 AM EST
[ Parent ]

Re: Yes but... (none / 0)

"Gone with the Wind"?

by mustakissa on Tue Jun 25th, 2013 at 02:59:04 PM EST
[ Parent ]

Re: Yes but... (none / 0)

"To Kill A (Mocking) Bird"

"Life shrinks or expands in proportion to one's courage." - Anaïs Nin

by Crazy Horse on Tue Jun 25th, 2013 at 04:17:56 PM EST
[ Parent ]

Re: Yes but... (none / 1)

Turbine max speed is 11rpm, that's a speed of 48.4 m/s at a radius of 42 m (where the A380's center of gravity should pass). At the same radius, the free space between two blades should be about 85-86 m. Subtracting the A380's fuselage height of 8.41 m, I get a possible passage time of 1.6 seconds. With the A380's length of 73.73 m, you'd need a speed of at least 165 km/h to pass. Even minimum takeoff speed (about 250 km/h) is above, so the A380 wins :-)

_{*Lunatic*, n.

One whose delusions are out of fashion.}

by DoDo on Tue Jun 25th, 2013 at 11:45:16 AM EST
[ Parent ]

Re: Yes but... (none / 1)

Yes, as long as the Rolex used to time the entry point is working properly. ;-)

"Life shrinks or expands in proportion to one's courage." - Anaïs Nin

by Crazy Horse on Tue Jun 25th, 2013 at 11:53:08 AM EST
[ Parent ]

Re: Yes but... (none / 0)

Timing is everything.

_{*Lunatic*, n.

One whose delusions are out of fashion.}

by DoDo on Tue Jun 25th, 2013 at 11:57:18 AM EST
[ Parent ]

Re: Yes but... (none / 1)

Reminds me of the question I asked of an ex-Air Force, United Airlines training pilot: "Can you barrel roll a 707?"

Answer: "Uh, I would rather not say."

by asdf on Tue Jun 25th, 2013 at 12:18:43 PM EST
[ Parent ]

Re: Yes but... (none / 0)

Well, I once wrote a short story in which a passenger took the commands of a Boeing 777, after hijackers killed both pilots. He had extensive experience with MS Flight Simulator, you see, so he knew exactly how hard you could push it without tearing the wings off. He flew it down into the Grand Canyon, then under the Golden Gate bridge, then headed for a disused airstrip in Kamchatka.

But he had never bothered learning to land the thing.

_{It is rightly acknowledged that people of faith have no monopoly of virtue
- Queen Elizabeth II}

by eurogreen on Tue Jun 25th, 2013 at 12:40:00 PM EST
[ Parent ]

Re: Yes but... (none / 0)

A barrel roll is supposedly a stress free manouevre, so it should be okay.

Concorde could barrel roll.

keep to the Fen Causeway

by Helen (lareinagal at yahoo dot co dot uk) on Wed Jun 26th, 2013 at 04:03:51 AM EST
[ Parent ]

Re: Yes but... (none / 1)

Exactly. But the only way to find out is to try it.

My experiences with perhaps a dozen ex-military pilots who went into the commercial airline business makes me think that passenger jets were routinely rolled. Back in the days before every single thing that you do is recorded. Probably not any more.

http://clickamericana.com/eras/1950s/passenger-jet-does-a-double-barrel-roll-1955

by asdf on Thu Jun 27th, 2013 at 11:56:34 AM EST
[ Parent ]

Re: weights (none / 0)

Apparently the Siemens direct-drives are even lighter: the page for the SWT-6.0-120 says THM is "under 350 tonnes". (With that, it presumably beats the Vestas V164-8.0 MW in power/THM.) Do you have a similar number for the SWT-6.0-154?

Also, looking at the rotor diameters, any chance the Alstom Haliade 150-6MW and the Siemens SWT-6.0-154 will be up-rated?

_{*Lunatic*, n.

One whose delusions are out of fashion.}

by DoDo on Tue Jun 25th, 2013 at 11:06:39 AM EST
[ Parent ]

Re: weights (none / 0)

Don't have the info on hand (incl. E-126); we'll see what and when i can pick anything up.

Uprating exercises have been done, but unlikely anything beyond the preliminaries would occur until more operational data is collected and analyzed.

"Life shrinks or expands in proportion to one's courage." - Anaïs Nin

by Crazy Horse on Tue Jun 25th, 2013 at 11:44:22 AM EST
[ Parent ]

More offshore wind construction pictures | 36 comments (36 topical, 0 editorial, 0 hidden)

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