HMS Queen Elizabeth
Discussion
doogz said:
Correct, yes.
It's likely that's how the T26 Frigates will be built as well.
Dynamic launches can be tricky things, and are must riskier than a float out.
Thanks.It's likely that's how the T26 Frigates will be built as well.
Dynamic launches can be tricky things, and are must riskier than a float out.
Why was it not always done like this ? Seems a much less dramatic but much more controlled way of doing things.
Is it because we used to build more ships than we had dry docks available to build them in ? And presumably the pre-fabricated construction meansm that the dry dock is tied up for much less time.
Seight_Returns said:
doogz said:
Correct, yes.
It's likely that's how the T26 Frigates will be built as well.
Dynamic launches can be tricky things, and are must riskier than a float out.
Thanks.It's likely that's how the T26 Frigates will be built as well.
Dynamic launches can be tricky things, and are must riskier than a float out.
Why was it not always done like this ? Seems a much less dramatic but much more controlled way of doing things.
Is it because we used to build more ships than we had dry docks available to build them in ? And presumably the pre-fabricated construction meansm that the dry dock is tied up for much less time.
Thanks again.
I get the modular build concept and how CAD has made that possible.
But my question was really more why we now build ships in dry docks and float them out - rather than building them on a slipway and pushing them down a slippery slope into the water. Even with the old "build a frame and clad it" construction method you could still build it in a dry dock and float it out ?
I get the modular build concept and how CAD has made that possible.
But my question was really more why we now build ships in dry docks and float them out - rather than building them on a slipway and pushing them down a slippery slope into the water. Even with the old "build a frame and clad it" construction method you could still build it in a dry dock and float it out ?
Any sort of slipway launch is much more complex and involved and has greater risk as the ship will still hit the water with a lot of energy and its a one shot deal, if it goes wrong in any fashion off to the scrappers. A dock flotation is much more controlled with no stress on the hull or surroundings if any problems are sighted the water can be immediately pumped back out for almost same day repair. We couldn't do this in the past as it would tie up a dock for far too long, but now we don't actually have any ships to fill the docks spaces so we have a couple spare for construction.
Seight_Returns said:
Thanks again.
I get the modular build concept and how CAD has made that possible.
But my question was really more why we now build ships in dry docks and float them out - rather than building them on a slipway and pushing them down a slippery slope into the water. Even with the old "build a frame and clad it" construction method you could still build it in a dry dock and float it out ?
Because you can build more on land and them poke them out the back door when they're finished. Dry docks aren't cheap.I get the modular build concept and how CAD has made that possible.
But my question was really more why we now build ships in dry docks and float them out - rather than building them on a slipway and pushing them down a slippery slope into the water. Even with the old "build a frame and clad it" construction method you could still build it in a dry dock and float it out ?
DDH is a good example where they're building the A-Class boats.
Edited by rhinochopig on Thursday 5th July 10:17
A dynamic or slipway launch is simpler than the alternatives, hence the fact that its been used since the dawn of shipbuilding, but apart from the inherent risks & stresses imposed during the once in a lifetime event, for which additional structure is sometimes required, it imposes a couple of other constraints. Firstly the ship is constructed at an angle, rather than flat, and secondly there are usually weight limits for the launch which means that the vessel has to be outfitted while afloat.
The other alternative to a drydock or slipway is a shiplift, basically a big platform which can be lowered (slowly) down into the water. With a capacity of 23,400 tonnes the shiplift at Barrow used to launch the Astutes is one of the bigger ones, so its not really practical for CVF.
Having been involved in the concept design of CVF its interesting seeing her being put together.
The other alternative to a drydock or slipway is a shiplift, basically a big platform which can be lowered (slowly) down into the water. With a capacity of 23,400 tonnes the shiplift at Barrow used to launch the Astutes is one of the bigger ones, so its not really practical for CVF.
Having been involved in the concept design of CVF its interesting seeing her being put together.
LB04 the biggest 'single piece' has just left its warehouse and is getting ready to be shipped and joined with the front half of the carrier in the coming weeks.
https://twitter.com/BAESystemsplc/status/257416623...
http://imageshack.us/scaled/landing/546/ohmsqueene...
Once welded on the carrier Will have the majority of its length and be significantly further through its build.
http://www.flickr.com/photos/qeclasscarriers/
If you're interested as to which block goes where, LB04 will soon be joined onto LB03, most of the CB's and SP's forward of that join are already on. A fair portion of the bits rearward of that join are done and waiting to go on.
http://img202.imageshack.us/img202/8134/blockalloc...
https://twitter.com/BAESystemsplc/status/257416623...
http://imageshack.us/scaled/landing/546/ohmsqueene...
Once welded on the carrier Will have the majority of its length and be significantly further through its build.
http://www.flickr.com/photos/qeclasscarriers/
If you're interested as to which block goes where, LB04 will soon be joined onto LB03, most of the CB's and SP's forward of that join are already on. A fair portion of the bits rearward of that join are done and waiting to go on.
http://img202.imageshack.us/img202/8134/blockalloc...
Block on its way now, passing west of the IoM at the moment. AIS report of the tug pulling the barge.
Wasn't it already delayed due to the weather predictions? I guess they decided better to get her there all be it late, rather than risk a trip north or keep hold of it until the weather clears.
Am in Rosyth today and tomorrow and QE's looking very good. Amazing to think how much of it's now in place and will in the dock by Christmas.
Am in Rosyth today and tomorrow and QE's looking very good. Amazing to think how much of it's now in place and will in the dock by Christmas.
hidetheelephants said:
Block on its way now, passing west of the IoM at the moment. AIS report of the tug pulling the barge.
It doesn't look very big, for part of a super carrier. 
[img]http://farm9.static.flickr.com/8484/8154696065_0e0efdbe0d.jpg[img]
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