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Author Topic: Shearleg Crane Barge  (Read 6940 times)

Umi_Ryuzuki

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Shearleg Crane Barge
« on: July 23, 2010, 08:31:01 PM »

In an effort to support the offshore energy industry Ryuzuki Heavy Industries created and installed
an offshore transformer platform to act as a hub and transfer energy created by new offshore
windmills and wave energy generators. With the platform in place, it became apparent that to
get the actual transformer module in place, a new crane would be required. With an August 14th
deadline looming, construction of the RHI Heavy Lift Barge was begun earlier this month.
The new HLB will be used, at sea, to lift the new tranformer module into place and complete the
offshore installation built earlier this year.

Umi_Ryuzuki

Minor set backs,...
The destruction of the perspex crane head when a test lift dropped the boom during lowering.
A brass brazed crane head replaces the orginal. And then the embarrasing mix up of the port
and starboard crane pulleys by the yard manager during a subsequent full rigging test.
 %)

http://www.youtube.com/watch?v=pbakmZrOSBQ&feature=related

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cos918

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Re: Shearleg Crane Barge
« Reply #1 on: July 23, 2010, 10:36:20 PM »

Umi
That crane is great. Cant wait to see photo's of her lifting that transformer.

John
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derekwarner

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Re: Shearleg Crane Barge
« Reply #2 on: July 23, 2010, 10:56:00 PM »

Umi says..... "And then the embarrassing mix up of the port and starboard crane pulleys by the yard manager during a subsequent full rigging test"

One of the difficult aspects of model building is the requirement of multi skilling  <:( %% ...you know  :embarrassed: one day we can be the dock yard cleaner, the next the dock yard manager  :o :-).... & the best of all...it it all goes to SH*T, the next day you can be the dock yard managing director & sack that stupid dock yard manager 

...but next problem is  <*< ....who do you replace him with?...maybe a new name?   how about naval engineering consultant..... ;D O0 ...that sounds OK...& probably on a higher pay packet too.........keep up the good work Umi  :-)).......


Oh BTW....are Ryuzuki Heavy Industries listed on the Stock Exchange??????  ;) ......................Derek

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Derek Warner

Honorary Secretary [Retired]
Illawarra Live Steamers Co-op
Australia
www.ils.org.au

hama

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Re: Shearleg Crane Barge
« Reply #3 on: July 23, 2010, 11:20:59 PM »

I will follow RHI with great interest, seems like a upcoming company!  :-))
Great work as always.
Hama
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Umi_Ryuzuki

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Re: Shearleg Crane Barge
« Reply #4 on: July 30, 2010, 05:44:38 AM »

Good help is always hard to find.
Keeping it is always harder...

The electricians went through and wired up everything.
Battery, ESC, Motor, Lights... It should make for some nice
pond dressing later in the evening, or an interesting challenge should
someone choose to run night ops.

 :-)
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CGAux26

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Re: Shearleg Crane Barge
« Reply #5 on: July 31, 2010, 12:19:45 AM »

What, no Navligts??  The Coasties will get you.   O0  :police:  First rate job, Umi.
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Umi_Ryuzuki

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Re: Shearleg Crane Barge
« Reply #6 on: August 03, 2010, 10:05:53 AM »

If I have a spare moment I will add Nav lights, and uptakes, and a lounge and coffee pot.  :P

I was working on the crane hooks, and having a hard time getting a clean casting.
Finally chatted with someone that asked if I had "talc'd" the mold. Since we do that
for most resin castings, ... I hadn't thought to do that for metal. It made all the difference
in the world... You can see the huge difference in pitting, before and after in the crane hooks.

 :-)
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Umi_Ryuzuki

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Re: Shearleg Crane Barge
« Reply #7 on: August 05, 2010, 04:57:38 AM »

Got the barge down to the pond for a float test.
It needs a bit more floatation. I took some out earlier, thinking that I had
too much, Now I have to put it back. However I may hold out on putting
the floation back into the stern.

There is five pounds (2.26kg) hanging from the hooks, and I needed
 17.5 pound(7.93kg) of cournterweight at the stern to level the barge.

I think we can get one more trial in before the regatta.

 O0



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geoff p

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Re: Shearleg Crane Barge
« Reply #8 on: August 05, 2010, 12:01:05 PM »

That is just magnificent!

BTW, where do you get those perfectly formed architectural-model trees?  They are just too regular to be 12":1ft  :-)

Geoff
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Umi_Ryuzuki

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Re: Shearleg Crane Barge
« Reply #9 on: August 06, 2010, 03:40:55 AM »

Thanks Geoff,

The trees are provided by the local parks department.
But I could make them if I had to... http://mysite.ncnetwork.net/res1tf1s/

 ok2
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Tug-Kenny

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Re: Shearleg Crane Barge
« Reply #10 on: August 06, 2010, 11:16:01 AM »


Hi Umi

Do you plan to move the Jib arm in and out. I was thinking that this would upset the balance with the varying load. I would imagine that the floatation would be need under the jib and the counter weights would need to be quite solid in the water.

Just my thoughts that occurred when I saw the construction. Hope you don't mind.   ;)

A lovely looking piece of engineering.   :-))

Ken

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Umi_Ryuzuki

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Re: Shearleg Crane Barge
« Reply #11 on: August 06, 2010, 06:30:25 PM »

At this time I simply wanted to get the hoist lines working for the competition.
It may remain that way as we wanted to focus on the tugs spotting the barge rather
than the crane operator lining up the load.

When the crane is unloaded and no counterweight set, the barge floats stern down.
So as I constructed it, I tried to plan out the trim. I was surpised by the amount of
counter weight still required. Once we get a final trim and counter weight I will create a
fixed pin to set the weights over.

 :-)
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derekwarner

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Re: Shearleg Crane Barge
« Reply #12 on: August 06, 2010, 11:15:13 PM »

Hi Umi....I has a similar thought to Ken..... :embarrassed:...but you don't need a  >>:-( computerised design package

a. luff the crane boom up to the highest desired angle .......mark & position your counterweight inboard for even keel
b. luff the crane boom down to the lowest desired angle .......mark & position your counterweight outboard for even keel
c. motorize the horizontal position of the counterweight relative to angle of boom luff to run between the points established @ a. & b.
d. the variation in horizontal positioning required for the counterweight will be proportional but not linear to the luff angle of the boom .....
e. one simple method is a tapered rope drum with a continuous U shaped helix machined into the drum

Derek :}
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Derek Warner

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Illawarra Live Steamers Co-op
Australia
www.ils.org.au

Umi_Ryuzuki

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Re: Shearleg Crane Barge
« Reply #13 on: August 08, 2010, 01:30:25 AM »

Yes, I had considered some pulley and counter weight ideas, but I was trying to keep
the build simple.  I only partially succeeded on that point.

In todays trials, a bit more floataton was added to the bow, and the final weight of the
"transformer module" was reduced to 4lbs(1.81kg). The total counterweight required was
subsequently reduced to a single 5lbs(2.26kg) weight.  :-)

The crane was very stable on the water, and under tow.
We found that there were little or no issues with the load penduluming or
behaving in any unruly manner. I think Phil will use a tow line on the stern next
time he has a go at this..  We ran several simulations, and are quite confident that
the crane will present a fine challenge to  event participants next weekend.

 8)
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Umi_Ryuzuki

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Re: Shearleg Crane Barge
« Reply #14 on: August 16, 2010, 03:51:37 AM »

We have sailed, and had fun..
The crane barge was built for a planned event during the Portland Regatta.
While we must admit, that the Belgians did it first, everyone that attended enjoyed the challenge.
Even those that did not sail in the event.

Plenty of wind for the sail boats, it made maneuvering
fairly difficult for every other boat.
But the weather calmed a bit for a beautiful night float

More here...  
http://www.rcgroups.com/forums/showthread.php?t=1292021

Foss Cup this coming Saturday, August 21st, in Bellevue Washingron...
Ryuzuki Heavy industries will be considering additional tug contractors for spotting this barge...
Some of those reviewed Saturday left a bit to be desired in experience...  %)

.
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pugwash

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Re: Shearleg Crane Barge
« Reply #15 on: August 16, 2010, 05:49:18 AM »

Umi,  Looks as though you gave them quite a challenge with that heavy lift barge,  nice setting but
I hope the water wasnt too cold for you.

Geoff
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Tug-Kenny

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Re: Shearleg Crane Barge
« Reply #16 on: August 16, 2010, 10:21:24 AM »


I thought that was great. Well done Umi and your club. What an idea for next years Wicksteed Park meeting.

See it here. Who's gonna make one ?     :-)) :-))

http://www.youtube.com/watch?v=Rk6km6_oA1Q&feature=player_embedded#!


ken


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Umi_Ryuzuki

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Re: Shearleg Crane Barge
« Reply #17 on: August 24, 2010, 07:43:17 PM »

A few more pics from events...

Some of the landings...

And Pics of the crane at Foss Cup, and Burnaby BC regatta...
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