Ship Building

[Speedy Builder5Participant @speedybuilder5]

How do they do that?

[Speedy Builder5Participant @speedybuilder5]

How do they do that? Big ships are built on a slipway, at an angle? So how do they get all the cabin doors vertical when the keel etc is tilting downhill.

BobH

[Bob Brown 1Participant @bobbrown1]

It's not the same as hanging a door in a house, and a lot of the fitting out is done once the ship is launched. Doubt you will see a spirit level used on a ship as the dam bubble would never stay still.

Bob

[Steven GreenhoughParticipant @stevengreenhough56335]

It’s what the tilt in the earth’s axis is for… the angle of a slipway matches it and the ship is in effect built straight up… honest.

[Neil WyattModerator @neilwyatt]

They have spirit levels with angled bubbles and squares that are set to the angle of the slipway. The workers can be sacked for bringing a conventional level or a plumbline onto the shipyard.

Neil

[Steven GreenhoughParticipant @stevengreenhough56335]

And all the spirit levels are calibrated to the slipway angle although of course if you hold the level the wrong way everything is off by twice the angle of the slipway in the opposite direction… or something…

[Steven GreenhoughParticipant @stevengreenhough56335]

Ahh Neil you beat me too it.

[jason udallParticipant @jasonudall57142]

All the above might be so.
But I would expect the keel to be laid horizontal ( neglecting any rise on said keel) building such chocks as required to match the slip.
This would allow the ship to be built square .
The thought of building a ship at such an angle looks to me to be wasteful and unnecessary.
.
Maybe look at video of ship lanches..and judge for yourself.

[SaxalbyParticipant @saxalby]

Neil had the right idea.

[Speedy Builder5Participant @speedybuilder5]

Checked out several launch videos – seems to me they do build on the slant.
Bob Brown, how did they get the bulkheads vertical ?
Steven G. – So do they have to push them down the slip – I think not.

Keep it coming BobH

[Steven GreenhoughParticipant @stevengreenhough56335]

;P

[Michael GilliganParticipant @michaelgilligan61133]

Posted by Speedy Builder5 on 15/05/2015 20:17:06:

… how did they get the bulkheads vertical ?

.

Spirit Level on Angle Plate.

MichaelG.

[Bob Brown 1Participant @bobbrown1]

You do not need a spirit level to get things square…. 3 4 5, measure along the floor say 3 and up the bulkhead 4 measurement between the two points, hypotenuse is 5 simples.

In modern construction it is all built on the shop floor in modules and craned into position.

Bob

[Martin WParticipant @martinw]

OOPS The spirit level is the wrong way round unless they going to smash the champagne onto the stern and launch bow first . Perhaps that's why some are launched sideways, no problem with bubbles then build level and heave ho off the edge.

Martin

[Anonymous]

Posted by Bob Brown 1 on 15/05/2015 20:46:23:

In modern construction it is all built on the shop floor in modules and craned into position.

Bob

A lot of modern ships are built in a dry dock or a floating dock; as Bob says pre-assembled modules are craned in, welded together and internal fitting proceeds as soon as some modules are in place. So by the time the ship is floated out, or off, it is ready for sea trials. The question of building on the slant doesn't arise.

Andrew

[Speedy Builder5Participant @speedybuilder5]

Saxlby – Was that an April 1st spirit level? or was it used to set up keel blocks ? Interesting picture.

[SaxalbyParticipant @saxalby]

Yes an "April 1st" spirit level Speedy. Courtesy of Adobe.

[Bob Brown 1Participant @bobbrown1]

Something like this.

Dry docked there and they wanted to flood the dock to get a Tug out but we had no propshaft as they were working on the stern gland seal as duty officer had trouble explain but a trip down the dock and the hole where the prop should be said all.

 

Edited By Bob Brown 1 on 15/05/2015 22:06:22

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