Greta Thunberg is in New York - Ships Nostalgia
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Greta Thunberg is in New York

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  #1  
Old 29th August 2019, 01:02
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Greta Thunberg is in New York

re: Sailing on the 60-foot (18-meter) Malizia II, outfitted with solar panels and underwater turbines to generate electricity, Thunberg will make (made) a zero-carbon trans-Atlantic journey.

So can anyone shed some light on these underwater turbines to produce electric power?

Greg Hayden
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  #2  
Old 29th August 2019, 08:54
Laurie Ridyard Laurie Ridyard is offline  
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Quote:
Originally Posted by kewl dude View Post
re: Sailing on the 60-foot (18-meter) Malizia II, outfitted with solar panels and underwater turbines to generate electricity, Thunberg will make (made) a zero-carbon trans-Atlantic journey.

So can anyone shed some light on these underwater turbines to produce electric power?

Greg Hayden
Not really. Here is a FB exchange....



Laurie Ridyard She was a passenger on a boat.. Jimmy describes it as " epic ".


Laurie Ridyard The only " exceptionally long and arduous task or activity." she carried out was to urinate and defecate into a bucket.
Oh ! Yes ! I forgot to mention . Dumping untreated sewage into the sea is hardly the work of a person committed to cleaning up the World. Since the 1950s, all commercial vessels are required to have a septic tank sewage system. Also , it is a criminal offence to dump untreated sewage into coastal waters of the US and Canada.

You have to laff....
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  #3  
Old 29th August 2019, 08:59
Winmar Winmar is offline  
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Lighten up lads, she is a schooly with a dream! I doubt that her taking a sh*t mid Atlantic will add to the problems of Global Warming! But to please the pedants she could change her name by deed poll to Greta Thunderbox!
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  #4  
Old 29th August 2019, 10:45
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I wonder how much carbon was emitted when that "boat" was made. Not exactly from "green" materials was it?

BW

J
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  #5  
Old 29th August 2019, 12:28
OilJiver OilJiver is offline  
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Quote:
Originally Posted by kewl dude View Post
….So can anyone shed some light on these underwater turbines to produce electric power?
Hi Greg, sorry to see that you simply ask a technical question and your post immediately gets hijacked by one of those “sad little men”, as fittingly defined by TommyR in another thread.

So anyway as I understand, Malizia has two hydro-generators installed on the stern of the boat. Physical appearance of the generators almost similar to outboard motors. When the boat is making sufficient speed under sail, the props can be lowered into the water to drive the generators.

(A bit similar to those systems on larger yachts where the propulsion engine is de-clutched and the prop allowed to trail & drive shaft mounted generator).

Rgds
OJ
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  #6  
Old 29th August 2019, 15:12
lakercapt lakercapt is offline  
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A big thing is being made of this. She was a passenger on the boat and maybe helped but did not sail it by herself.
Who like flying across the Atlantic anyhow as you are crammed in with little space to move.and the food is indescribable.
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  #7  
Old 29th August 2019, 20:15
OilJiver OilJiver is offline  
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Seems plenty comment on all that stuff in other threads LCapt.

But here, I think Greg’s OP was simply asking for some information re tech systems as installed on vessel.
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  #8  
Old 6th September 2019, 01:50
gordonarfur gordonarfur is offline
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Who cares, a stupid little girl still wet behind the ears prattling on about something she knows F.A. about.
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  #9  
Old 7th September 2019, 20:11
Dartskipper Dartskipper is offline  
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Be fair, she has read loads of stuff that agrees with her view, but not much it seems of a counter argument.
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  #10  
Old 8th September 2019, 01:20
gordonarfur gordonarfur is offline
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Hi Roy, you probably know that in the 1100,s England exported wine to Europe, in the 1600,s the Thames froze over for significant period, but does she? . A couple of weeks ago the biased broadcasting service plus all the other wimps were whining about the temperature in the UK, today I notice that the Mancunians watching the test match were wrapped up in their winter woolies, the climate changes all the time nothing new about that except to little girls still wet behind their ears.
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  #11  
Old 9th September 2019, 09:48
Biggles Wader Biggles Wader is offline  
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Originally Posted by OilJiver View Post
Seems plenty comment on all that stuff in other threads LCapt.

But here, I think Greg’s OP was simply asking for some information re tech systems as installed on vessel.
And thank you for your sensible answer. It seems to be a development of the rather crude generation system I can remember which was a Walker log used to twist a dynamo rather than a distance counter.
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  #12  
Old 9th September 2019, 10:38
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Can`t but wonder about her parents & how they figure in this, & what their views are or their agenda. To me, & I could be wrong, it just doesn`t stack up, but I feel she`s being led up the garden path, & where is the backing coming from.
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  #13  
Old 9th September 2019, 10:53
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That prompted my interest. The instrument for mounting on the taffrail did display distance not speed. Some models may have had a tacho generator for onward repeating but the least complicated/expensive would have been to close and open a contact every time the counter passed 9.26 metres, giving out (and maybe defining the origin for) the standard 200 pulses per nautical mile.

Can't find a drawing on line.
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Old 9th September 2019, 19:03
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I had an electronic speed indicator on my small launch (36ft) Our Rosalie in the 1980's. It looked and worked like a patent log, but also indicated speed. The impeller was at the end of a long cable towed astern. It was notorious for giving wildly exaggerated readings when altering course, eg. it noted that we were achieving nearly 15 knots when I made an alteration of course, which was a good margin above the best speed for the hull of 9 knots!

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  #15  
Old 10th September 2019, 02:08
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There are commercial installations of propeller turbine generators using wave and tide power operating successfully. Several around the UK coastline.
Read about one here:- https://www.independent.co.uk/enviro...-a8503221.html
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  #16  
Old 10th September 2019, 05:29
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Found one:

https://www.wattandsea.com/en/produc...ydrogenerators

They have both transom-mounted swing down units and a permanently installed in the hull models.

hydro-300W-970mm+610mm.jpg (19.8 KB)
Outremer-avec-hydro.120.jpg (52.2 KB)
pod-carene-300px.jpg (13.1 KB)
station-cao-400x300.jpg (32.6 KB)

Greg Hayden
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File Type: jpg hydro-300W-970mm+610mm.jpg (19.8 KB, 2 views)
File Type: jpg Outremer-avec-hydro.120.jpg (52.2 KB, 2 views)
File Type: jpg pod-carene-300px.jpg (13.1 KB, 1 views)
File Type: jpg station-cao-400x300.jpg (32.6 KB, 2 views)
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  #17  
Old 10th September 2019, 10:20
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So, the message to take away is that we are already using renewable energy sources. Try telling that to virtue-signalling kids.
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  #18  
Old 10th September 2019, 13:11
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Over our heads in the Pliocene: https://www.sciencenews.org/article/...test_Headlines
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  #19  
Old 10th September 2019, 16:47
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So, the message to take away is that we are already using renewable energy sources. Try telling that to virtue-signalling kids.
Virtue signalling eh Basil? A phrase associated almost exclusively with authoritarian types.
This "kid" has had more impact on the world's view of climate change than anyone else in recent years.
Gammons may not like it, but opinion is changing fast and it is being driven by the young. More power to them I say.
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