RIN
Well-Known Member
What a noisy ship it is. We're currently staying half a mile away at Royal Clarence behind Burrow island, yet every time they start the gennies on the PoW, our boat begins to vibrate. How do the locals put up with it?
The Prince of Wales Aircraft Carrier
- Thread starter RIN
- Start date
Rappey
Well-Known Member
From news articles the locals are very annoyed about it.. There was meant to be a power supply for the ships but seems this has yet to materialise..
Its even better when both of them are along side..
Border force use many docks around the uk.. One dock has been redeveloped and is now all properties so the people living there complain about the generator running all night..
Its even better when both of them are along side..
Border force use many docks around the uk.. One dock has been redeveloped and is now all properties so the people living there complain about the generator running all night..
Farmer Piles
Well-Known Member
If the wind is in the south we can hear the generators on the RFA ships that berth in Falmouth and they are 3-4 miles away and beyond the next headland from us. Not loud but audible if you are outside.
Bowlerhat
Well-Known Member
The HV/LV system is very complex and suitable shore power supplies are rare. The 2 gas turbines and 4 diesel generators produce power for electric motors to drive the shafts (as well as domestics). As such, for redundancy and resilience they sit high in the ship rather than on the shaft line. The twin island design is basically 2 funnels for the gas turbines. However, the F35B is considerably more noisy!
penfold
Well-Known Member
The quayside in pompey was supposed to get a whizzo power supply so the carriers can switch off the donks when alongside, but it's no doubt been deferred for budgetary reasons; quaysides generally are devoid of power hook-ups, it would be a quick win for decarbonising shipping to equip them to do so and allow shipping to switch off their generators when tied up, as well as beneficial to local air quality(and quieter).
Throbbers who buy houses next to noisy things(airfields, motor racing circuits, container terminals etc) and then complain about that noise deserve ritual humiliation, not pandering. The gowks who whined to Forth Ports because there were some ships tied up in Leith Docks during the pandemic are a good example of this.
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Gary Fox
N/A
I thought large warships were designed with the machinery hidden far below the waterline for protection, maybe it doesn't apply today.
If they can't easily use shore power it's a shortsighted error by the designers!
penfold
Well-Known Member
The diesels on POW and QE are in the bilge, it's just the gas turbine generators which are in the sponsons beside the hangar; they are designed to use shore power, it's just there isn't a ~8MW 11kV power socket handy.
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Gary Fox
N/A
I see, thank you.
Bowlerhat
Well-Known Member
That exists in Pompey.
john_morris_uk
Well-Known Member
Indeed. It’s funny how people jump to conclusions about design as if Naval Architects just plonk things in the hull without a thought.
Type 23’s which were designed to be as quiet underwater profiles have electric drives direct to the shafts with no gearbox. (The main sources of the acoustic signature of the ship). The generators are on acoustically isolated beds above the waterline to reduce noise transmission. Some of the 23’s were VERY quiet underwater (and therefore optimised for submarine hunting)
I’m not sure where this quaint idea of protecting equipment by putting it low down in the ship comes from. Missiles and torpedoes and mines don’t discriminate and ship survival is complex.
penfold
Well-Known Member
The carriers are highly subdivided to that end; the diesels are in 4 separate machinery spaces. Even the T23 didn't have that level of compartmentalisation, each pair of generators shared a space.
They've obvs not paid the leccy bill then.