HMS Queen Elizabeth

Author
Discussion

ninja-lewis

4,239 posts

190 months

Wednesday 16th April 2014
quotequote all
MartG said:
Don't forget that when they float her out of the dock she'll be lacking a lot of equipment etc. so will be light and therefore floating high wink
Not to mention fuel and other liquid stores so she will be sitting very high in the water while they float her out. Google has pictures of last year's USS Gerald R Ford float out - the before and after pics show she was barely using half her expected operational draught.

Kenty said:
Wasn't there something on the news recently that the channel has to be dredged for her to leave, at a cost of around £40M?
It was only in the news because some MP asked a question in Parliament, got a perfectly reasonable answer and then proceeded to spout off nonsensically anyway.

It was always part of the project that Portsmouth will be upgraded to support the new carriers. The harbour channel will be deepened and new jetties built (the existing ones are past their sell by date anyway). Various other upgrades to HMNB Portsmouth will involve a new dedicated power supply (either generated on site or a new connection to the Grid) to supply warships alongside. Not surprisingly some silly councillor got his name in the paper by claiming they would take power from the city supply and cause power cuts.


Godalmighty83

417 posts

254 months

Wednesday 16th April 2014
quotequote all
mybrainhurts said:
It'll never float, the fools are making it out of steel...
Getting steel things to float can be tricky, just ask the spanish submarine industry...

FourWheelDrift

88,483 posts

284 months

Wednesday 16th April 2014
quotequote all
PugwasHDJ80 said:
That last picture really make it looks like the boat won't actually float when the dock is flooded

Has anyone checked because otherwise that's going to be a touch embarrassing!
Of course it will float and get out the dock, this is an example of great modern Brunelian precision engineering........er............ok, bad example - http://en.wikipedia.org/wiki/SS_Great_Eastern#Laun...

smile

rhinochopig

17,932 posts

198 months

Wednesday 16th April 2014
quotequote all
Out of interest, who's supplying the PMS for her?

hidetheelephants

24,167 posts

193 months

Wednesday 16th April 2014
quotequote all
I hope for the sake of the matelots it's not TM Master.

PugwasHDJ80

7,523 posts

221 months

Wednesday 16th April 2014
quotequote all
That last picture really make it looks like the boat won't actually float when the dock is flooded

Has anyone checked because otherwise that's going to be a touch embarrassing!

MartG

20,663 posts

204 months

Thursday 17th April 2014
quotequote all
PugwasHDJ80 said:
That last picture really make it looks like the boat won't actually float when the dock is flooded

Has anyone checked because otherwise that's going to be a touch embarrassing!
You DID read the last page of comments, didn't you ?

PugwasHDJ80

7,523 posts

221 months

Thursday 17th April 2014
quotequote all
MartG said:
PugwasHDJ80 said:
That last picture really make it looks like the boat won't actually float when the dock is flooded

Has anyone checked because otherwise that's going to be a touch embarrassing!
You DID read the last page of comments, didn't you ?
Wtf

I didn't post that message last night, that's really freaky


hidetheelephants

24,167 posts

193 months

Thursday 17th April 2014
quotequote all
doogz said:
Seight_Returns said:
What's a brake propeller ?

I'd guess it's something that allows the shafts to be driven under power without generating any propulsion - but that's purely a guess.
Pretty much. They produce a much more violent wash/wake than a regular prop because they don't produce any thrust. They're used to check mounting systems for equipment, and vibration/fatigue allowances.

The comment about it not having the props fitted wasn't so much to point out that they'll be using brake wheels, it was more that it'll likely be leaving the dock with no prop/wheel fitted, as they might need the extra little bit of clearance it provides.
How do they fit props if not while the thing's in drydock? Fitting them while afloat seems rather impractical.

Boatbuoy

1,941 posts

162 months

Thursday 17th April 2014
quotequote all
hidetheelephants said:
How do they fit props if not while the thing's in drydock? Fitting them while afloat seems rather impractical.
Long snorkels

shouldbworking

4,769 posts

212 months

Thursday 17th April 2014
quotequote all
Boatbuoy said:
Long snorkels
[trivia]
The maximum length of a snorkel for a human is ~50cm.
[/endtrivia]

hidetheelephants

24,167 posts

193 months

Thursday 17th April 2014
quotequote all
doogz said:
hidetheelephants said:
How do they fit props if not while the thing's in drydock? Fitting them while afloat seems rather impractical.
With great difficulty.
SRSLY? Jings, who thought that would be a good idea? It's hard enough wrangling a 50 tonne lump of bronze that cost £1m+ when you're stood on concrete and can use cranes. Who signed off on it, so I can go round their house and throw eggs?

MBBlat

1,620 posts

149 months

Thursday 17th April 2014
quotequote all
hidetheelephants said:
SRSLY? Jings, who thought that would be a good idea? It's hard enough wrangling a 50 tonne lump of bronze that cost £1m+ when you're stood on concrete and can use cranes. Who signed off on it, so I can go round their house and throw eggs?
Probably the same person that signed off on Rosyth as the build yard in the first place.
And the MP who's constituency, Dunfermline East, borders Rosyth obviously had no influence on that decision rolleyes

HarryW

15,150 posts

269 months

Thursday 17th April 2014
quotequote all
MBBlat said:
hidetheelephants said:
SRSLY? Jings, who thought that would be a good idea? It's hard enough wrangling a 50 tonne lump of bronze that cost £1m+ when you're stood on concrete and can use cranes. Who signed off on it, so I can go round their house and throw eggs?
Probably the same person that signed off on Rosyth as the build yard in the first place.
And the MP who's constituency, Dunfermline East, borders Rosyth obviously had no influence on that decision rolleyes
Yes, that well known centre of shipbuilding by a company with hundreds of years of provenance....

andy97

4,702 posts

222 months

Thursday 17th April 2014
quotequote all
MBBlat said:
Probably the same person that signed off on Rosyth as the build yard in the first place.
And the MP who's constituency, Dunfermline East, borders Rosyth obviously had no influence on that decision rolleyes
Long studies were done on where the ships could be assembled and given the size and draft of the ships Rosyth was the only option within GB without developing new facilities or recommisionimg some of the old North Sea oil rig yards.

andy97

4,702 posts

222 months

Thursday 17th April 2014
quotequote all
ninja-lewis said:
It was always part of the project that Portsmouth will be upgraded to support the new carriers. The harbour channel will be deepened and new jetties built (the existing ones are past their sell by date anyway). Various other upgrades to HMNB Portsmouth will involve a new dedicated power supply (either generated on site or a new connection to the Grid) to supply warships alongside.
And even then they are too big to get in to Portsmouth at all states of the tide. There will probably periods when they have to anchor at Spithead and not come in to Portsmouth.

hidetheelephants

24,167 posts

193 months

Thursday 17th April 2014
quotequote all
andy97 said:
MBBlat said:
Probably the same person that signed off on Rosyth as the build yard in the first place.
And the MP who's constituency, Dunfermline East, borders Rosyth obviously had no influence on that decision rolleyes
Long studies were done on where the ships could be assembled and given the size and draft of the ships Rosyth was the only option within GB without developing new facilities or recommisionimg some of the old North Sea oil rig yards.
Not very in-depth studies; Inchgreen drydock is big enough and so is the assembly dock and the dry dock at H&W in Belfast. You'd need to shift the cranes to accommodate the flightdeck sponsons, but given the £50 million spent rebuilding the dock at Rosyth I had rather assumed the bloody thing fitted the hole provided. Which just goes to show, assuming makes an ass out of everyone.

andy97

4,702 posts

222 months

Thursday 17th April 2014
quotequote all
Very in depth studies and I worked for the former head of naval base infrastructure who chaired the study team. Not sure why Inchgreen was rejected but it was, along with many others, including some quite innovative ideas.

H and W is not in GB and was rejected for other reasons.

ninja-lewis

4,239 posts

190 months

Thursday 17th April 2014
quotequote all
andy97 said:
And even then they are too big to get in to Portsmouth at all states of the tide. There will probably periods when they have to anchor at Spithead and not come in to Portsmouth.
I think that's always been the case for the Navy's capital ships.

andy97

4,702 posts

222 months

Thursday 17th April 2014
quotequote all
Very in depth studies and I worked for the former head of naval base infrastructure who chaired the study team. Not sure why Inchgreen was rejected but it was, along with many others, including some quite innovative ideas.

H and W is not in GB and was rejected for other reasons.