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by popeye62
Fri Dec 16, 2016 12:40 am
Forum: The Workshop
Topic: Wear in stern tube bearing
Replies: 20
Views: 2647

Re: Wear in stern tube bearing

Thanks Big Pete, all spot on and pretty much where I'm at. The LO is MELO and no there are no records. Now using Hydrox which if they had been using originally we would not be in this situation but that costs money and as we all know what ship owners are like. Thanks Merlyn, it is nigh on impossible...
by popeye62
Thu Dec 08, 2016 12:25 am
Forum: Crew Mess
Topic: Engine Room Fire
Replies: 23
Views: 1046

Re: Engine Room Fire

Call general muster. Stop everything including QCV's, batten down the engine room and inject CO2. Wait for as long as possible then BA team to make entry at lowest point with foam branches and water wall while ventilating the space.
by popeye62
Tue Dec 06, 2016 9:03 am
Forum: Crew Mess
Topic: Princess "Magic Pipes"
Replies: 7
Views: 515

Re: Princess "Magic Pipes"

As an engineer with P&O/Princess Cruises for 14 years I can assure you that this is highly unusual and very surprising. It is no way 'rampant'. The chief engineer will more than likely go to prison. It is not so long ago that passengers filmed a vessel of the group dumping sacks of garbage over ...
by popeye62
Mon Dec 05, 2016 9:09 am
Forum: The Workshop
Topic: common rail Help me
Replies: 5
Views: 1164

Re: common rail Help me

Dear Wojtasfans Medium speed CR engines differ from slow speeds in that a MS cannot be 'camshaftless' a MS engine needs a camshaft to operate the valves. A slow speed uses ports for inlet and a hydraulically operated exhaust valve, or loop scavenged. While the camshaft still drives the pumps on 2S a...
by popeye62
Sun Dec 04, 2016 6:39 am
Forum: The Workshop
Topic: Wear in stern tube bearing
Replies: 20
Views: 2647

Re: Wear in stern tube bearing

Thanks D, I understand your line of questioning but unfortunately I was not on-board the vessel at the time, plus, the information I am being given is the information that the owner wants me to have. My own investigation is limited and therefore there are certain assumptions that I have to make whic...
by popeye62
Sun Dec 04, 2016 6:01 am
Forum: The Workshop
Topic: Measuring rudder pintle bearing clearances
Replies: 1
Views: 3578

Re: Measuring rudder pintle bearing clearances

Hi Vegman I was watching this job recently in DD (single pintle, semi-balanced) and the welded cover (actually this was a bolted and jointed cover) was removed. It is much easier and accurate this way i.e. you can see that you are getting a true clearance and not measuring a 'lip' in the bush or lin...
by popeye62
Sun Dec 04, 2016 3:03 am
Forum: The Workshop
Topic: Wear in stern tube bearing
Replies: 20
Views: 2647

Re: Wear in stern tube bearing

Thanks Merlyn The wear is all in the bottom of the bearing as the mass of the tailshaft and propeller is approx. 20 tons and is always acting downwards (negating transverse propeller thrust from hard turns or the 'hand' of the propeller). There is no wear in the upper portion so saying 'per side' is...
by popeye62
Sun Dec 04, 2016 1:32 am
Forum: The Workshop
Topic: Wear in stern tube bearing
Replies: 20
Views: 2647

Re: Wear in stern tube bearing

Thanks D and Revolver There are no pumps or coolers (apart from the forward seal 'circulatory' tank which cools the oil by convection). The only pump is a transfer pump for topping up the header tank. The cooling comes from a cooling tank which surrounds the stern tube and is permanently filled with...
by popeye62
Fri Dec 02, 2016 8:20 am
Forum: The Workshop
Topic: Wear in stern tube bearing
Replies: 20
Views: 2647

Re: Wear in stern tube bearing

Thanks Merlyn, the misalignment is a symptom not a cause. The original calculation and the real world measurements were all within IACS rules for bearing reaction and misalignment tolerance. There is no sign of bottom damage. Thanks D, a mathematical solution does have many variables that is why I w...
by popeye62
Thu Dec 01, 2016 8:13 am
Forum: The Workshop
Topic: Wear in stern tube bearing
Replies: 20
Views: 2647

Wear in stern tube bearing

Good day all I'm looking for a ball park figure for wear in a single (aft) oil lubricated stern tube bearing and its steel backing. The shaft is 470 mm diameter. Material unknown The bearing is 4 mm thick. Material is PbSb10Sn6 The steel backing is thick. Material is EN-GJL-250 Say the propeller and...

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