Print

Please login or register.
1 Hour 1 Day 1 Week 1 Month Forever
Login with username, password and session length

[BazaJT]

So Britains biggest,most expensive warship H.M.S. Queen Elizabeth has a leak.Apparently it's a seal on one of the propeller shafts that's the cause.As yet the cost of repair is unknown.perhaps they should have ticked the box for an upgraded warranty

[Varche]

New design so you expect teething problems. I am not unduly concerned.

We live in an age where every small problem is blown out of proportion by a media driven only by sensationalism . It would be interesting to see what teething problems China andRussia experienced on sea trials of their new designs. Of course they would not publicise them.

[aaronjb]

200L/day water ingress apparently; which sounds like the proverbial drop in the ocean to me, given the size of the ship and assuming it has a decent bilge pump..

[aaronjb]

Of course they would not publicise them.

I'm sure plenty of journalists there would love to.. but they know they would swiftly disappear, never to be seen again.

I think I prefer our version of the world, but I'm not entirely sure these days...

[Marks DTM Calib]

From what I have seen, the prop lines always piss water in when the prop is stationary, the amount quoted is bugger all, the local pump would shift that much in a few minutes tops.

[Varche]

From what I have seen, the prop lines always piss water in when the prop is stationary, the amount quoted is bugger all, the local pump would shift that much in a few minutes tops.

or three disident journalists armed with buckets.

[Sir Tigger KC]

Send some spotty yoof down there with a grease gun and that'll be alright! 

[Marks DTM Calib]

The seals I have seen on other vessels are a pretty hard polyurethane or similar tube and the shaft has a spiral profile machined into it. In fact, many setups have a tank arrangement at the base of the shaft to collect and manage the leak.

When the shaft is rotating you get pretty much bugger all leakage but, when its stationary, it pisses in.....in reverse (which is actually pretty rare) it increases further.

[aaronjb]

The seals I have seen on other vessels are a pretty hard polyurethane or similar tube and the shaft has a spiral profile machined into it. In fact, many setups have a tank arrangement at the base of the shaft to collect and manage the leak.

I always wondered how the prop shaft was sealed.. now I know!  Clever setup (in forward rotation, anyway).

[Kevin Wood]

So we need to take it out and give it a good Italian tune-up?

I guess the senior service are saving up for the fuel now.

[LFF64]

200L/day water ingress apparently; which sounds like the proverbial drop in the ocean to me, given the size of the ship and assuming it has a decent bilge pump..

It says 200L an hour from what I read

[Marks DTM Calib]

Either way its all pretty irrelevant, must be a slow news day 

The ship is currently in port for systems snagging (we have a crew back on board), it will be 'well sorted' before it even becomes a major issue

[Bigron]

I seem to remember that one of my earlier cars (maybe the A30?) had a similar arrangement, called an "oil scroll" in the manual, to help with crankshaft sealing - or am I dreaming?

Ron.

[Andy B]

It's too long ago for me to remember how shafts were sealed. We had a few educators dotted around to 'pump' bulges out .... venturi connected to fire main .... many a bilge pumped out under the cover of darkness 

[Andy B]

I seem to remember that one of my earlier cars (maybe the A30?) had a similar arrangement, called an "oil scroll" in the manual, to help with crankshaft sealing - or am I dreaming?

Ron.

Many a car used an oil scroll in years gone by