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Author Topic: Q & A - Blue Marlin - Heavy lift semi submersible ship  (Read 76040 times)

Umi_Ryuzuki

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Re: Q & A - Blue Marlin - Heavy lift semi submersible ship
« Reply #100 on: September 07, 2008, 09:42:54 PM »

 8)
Trying to find the air vents....
Are they the vinyl tubes?
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Umi_Ryuzuki

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Re: Q & A - Blue Marlin - Heavy lift semi submersible ship
« Reply #101 on: September 07, 2008, 10:00:18 PM »

So you will be running those up to the forecastle deck...  O0
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Martin [Admin]

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Re: Q & A - Blue Marlin - Heavy lift semi submersible ship
« Reply #102 on: September 17, 2008, 04:47:35 PM »


Those pumps must be really good, it's emptied that galvanised tank completely!   ::)
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dreadnought72

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Re: Q & A - Blue Marlin - Heavy lift semi submersible ship
« Reply #103 on: September 17, 2008, 08:51:47 PM »

Ha ha - too good, Martin!  O0
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boatmadman

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Re: Q & A - Blue Marlin - Heavy lift semi submersible ship
« Reply #104 on: September 17, 2008, 08:55:33 PM »

Damn - no wonder it wouldnt sink!
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Umi_Ryuzuki

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Re: Q & A - Blue Marlin - Heavy lift semi submersible ship
« Reply #105 on: September 23, 2008, 05:45:50 AM »

No real progress at the mo, been working stupid hours.

But, been thinking about the superstructure and it will need lots of small windows cut in to it.

How do you all cut windows in plastic so they look neat, straight and regular, bearing in mind this thing is about 1:175 scale?

Ian

One at a time...

1/190 scale thing... Not supposed to say for what or for who yet... ::)
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bigford

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Re: Q & A - Blue Marlin - Heavy lift semi submersible ship
« Reply #106 on: September 23, 2008, 05:55:40 AM »

ian
 how about building in levels bottom then a gap where the windows go then the next
level and a gap for the windows  and keep doing this for all 4 or 5 story's
 now where the gaps are fill in the gaps with strips  to frame out the window
opening. or where the gap is use clear plastic now cut tape to the window size
and tape all the windows then paint  :D
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Umi_Ryuzuki

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Re: Q & A - Blue Marlin - Heavy lift semi submersible ship
« Reply #107 on: September 28, 2008, 06:46:27 PM »



Your test makes me consider how delicate those oil rig moves must really be. ???

Bigford is on to something with his strip cut construction.
Depending on ho the material you choose mends, you can mark out the window location first.
Then cut the strip away, then cut the "betweens" away from the openings, and place them back.
I have done that with cardboard construction in architectrual models.

In this case, cut the full openings, then cut the out mullions and put them back. ;)
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cos918

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Re: Q & A - Blue Marlin - Heavy lift semi submersible ship
« Reply #108 on: September 28, 2008, 07:49:51 PM »

hi Ian for windows. You have options. 1 the black tape route. or 2 cut them out. I remember reading a us model railroad mag and they had a tool .It was a corner punch. I cant find the mag any were. Had a quick search on the net and found this. It might be a bit big but if you got a smaller one it would give nice corners on the window.

john

http://cgi.ebay.com/3-PC-CORNER-PUNCH-CHISEL-SET-model-wood-ship_W0QQitemZ110117293549QQcmdZViewItem?_trksid=p3286.m20.l1116
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boatmadman

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Re: Q & A - Blue Marlin - Heavy lift semi submersible ship
« Reply #109 on: September 29, 2008, 06:31:23 AM »

Thanks Umi and John,

The strip idea is a good one, the only concern I have is seeing the join line across the superstructure after finishing. The big plus to this is adding the mullions after instead of trying to cut around them.

The corner punch might be worth trying. I am using plastic, so I may be able to make one up just for this job.

Ian
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SteamboatPhil

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Re: Q & A - Blue Marlin - Heavy lift semi submersible ship
« Reply #110 on: September 29, 2008, 01:54:00 PM »

You could try making a punch from square tube and file the insides to give you a nice sharp edge. Depends on how many windows, you might have to make several. Should work on the the thickness you will be using.  O0
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boatmadman

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Re: Q & A - Blue Marlin - Heavy lift semi submersible ship
« Reply #111 on: September 29, 2008, 03:30:16 PM »

Phil,

Thats just what I had in mind  O0
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Martin [Admin]

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Re: Q & A - Blue Marlin - Heavy lift semi submersible ship
« Reply #112 on: October 02, 2008, 09:47:33 PM »


Looks great Ian!  O0

While we're sort of on that subject, has anyone tried photo etching brass for windows etc?
I was wondering if it could be computer printed, transfered to the brass and etched at home
like I used to for circuit boards as a teenager.
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bigford

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Re: Q & A - Blue Marlin - Heavy lift semi submersible ship
« Reply #113 on: October 03, 2008, 12:22:06 AM »

NICE!!!!! O0
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Umi_Ryuzuki

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Re: Q & A - Blue Marlin - Heavy lift semi submersible ship
« Reply #114 on: October 03, 2008, 03:31:53 AM »

Now you're making it look too easy... ::)

Looks fantastic. Although, I thought the face of the
bridge was canted. You're going to have to start building
 an SBX platform, or Thunderhorse pretty soon.

 ;)
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boatmadman

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Re: Q & A - Blue Marlin - Heavy lift semi submersible ship
« Reply #115 on: October 03, 2008, 06:58:46 AM »

Actually, Umi, you are right, the bridge face is canted, but I didnt realise that until after I built the bridge (its the age you know), so I thought I would just claim that the bridge was modified in a later drydock.  O0

Ian
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Mankster

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Re: Q & A - Blue Marlin - Heavy lift semi submersible ship
« Reply #116 on: October 03, 2008, 01:36:09 PM »

I just caught up with this thread, excellent work and glad to see it has moved on. O0

dreadnought72

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Re: Q & A - Blue Marlin - Heavy lift semi submersible ship
« Reply #117 on: October 03, 2008, 03:22:27 PM »

I hadnt appreciated just how tender it would be when submerged, I havent put any stabilizing buoyancy in yet, I thought it would be ok in a flat calm test tank!

Hi Ian - I just picked up on this bit of the thread.

If the hull's full of water, and underwater, there's not much righting ability there at all. I suspect, with the generous beam, the above water "stubby towers" for buoyancy, and a thin layer of dense ballast on the bottom of the hull (meaning there'll be some air in the tanks) all will be well.

After all, if the big boys can move oil rigs then the physics has to be ok.

One last point: "tender when submerged". That rather reminds me of the first bath I had after my vasectomy. :o

Andy

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dan

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Re: Q & A - Blue Marlin - Heavy lift semi submersible ship
« Reply #118 on: October 05, 2008, 10:02:02 PM »

hi boatmadman,

it looks fantastic, how long has it taken you to make the superstructure so far?

cheers, dan

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boatmadman

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Re: Q & A - Blue Marlin - Heavy lift semi submersible ship
« Reply #119 on: October 05, 2008, 10:03:35 PM »

Dan,

Not really sure, maybe about 15 to 20 hrs - I am a slow worker!

It would probably be a real surprise if I worked out how much time I really spent on boat building.
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cos918

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Re: Q & A - Blue Marlin - Heavy lift semi submersible ship
« Reply #120 on: October 06, 2008, 06:08:03 PM »

ian she is realy starting to take shape O0. You are at that stage i love were you can put all the big assemblis together and it statrs to take shape ,squint your eyes and it looks done

john
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dan

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Re: Q & A - Blue Marlin - Heavy lift semi submersible ship
« Reply #121 on: October 06, 2008, 08:31:27 PM »

Dan,

Not really sure, maybe about 15 to 20 hrs - I am a slow worker!

It would probably be a real surprise if I worked out how much time I really spent on boat building.

its certainly payed off, it looks fantastic, all of it does

cheers, Dan
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cos918

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Re: Q & A - Blue Marlin - Heavy lift semi submersible ship
« Reply #122 on: October 15, 2008, 01:18:34 PM »

hi Ian looking  good  :-)) :-)) :-)) %) O0 . Were you able to have the box off centre and compensate in the lift or is that still to come . you said you lifted 4lt of water thats about 4 KG is that near max lift. 


john
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boatmadman

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Re: Q & A - Blue Marlin - Heavy lift semi submersible ship
« Reply #123 on: October 15, 2008, 01:20:49 PM »

Thats about max lift, I only had the box on centre, off centre trials will be somewhere in the future
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cos918

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Re: Q & A - Blue Marlin - Heavy lift semi submersible ship
« Reply #124 on: October 15, 2008, 01:22:34 PM »

will that lift capacity go down in weight when the ship is full detailed which adds more weight to her

john
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