Jul 2007 | Page - 3
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FOR OFFICERS  
VALUE ADDED COURSES
JUL 07
BTM

2-6,16-20,23-27
SMS

9-13
BTM Refresher
30 & 31
PSC/OM
2-3,11-12,19-20,26-27,30-31
OILFAM
2-6
CHEMFAM
9-13
ATCO
16-18
ATOO
26-28
AUTOMATION
16-17
ELECTRICAL PRACTICES
2-5
FRAMO
9-11,23-25
MEMS
6-7,20-21
ESMISM
2,14,21,23 &30
ERS OPS Lvl
23-25
COC
9-11 & 23-25
TPSH
12-14 & 26-28
BULK CARRIER PRACTICE
7,21 & 30
INTERNAL AUDITOR COURSE
13-14 & 30-31
FOR CREW
VALUE ADDED COURSES
JUL 07
ISTR
 2-6,9-13,16-20,23-27
OILFAM
 2-6
CHEMFAM
 9-13
TEAMWORK
 7,21 &28
Basic Framo For Fitters
16 & 30
Please Note: Computer Based Training (CBT) is carried out everyday.
Tentative course schedule for the month of Jul 2007. May subject to changes. Please contact SIMS Mumbai for confirmation.

The dreaded months of the year have arrived in India – the monsoon. The first day of casualty was 30th June- Mumbai coming to a stand still with heavy rain. ESM, Mumbai working with a skeleton staff. Arrangements for stranded crew in the airports, advising the ship’s master for the delay in replacing in one waiting eagerly on board.
In a nutshell, these are part of the regular working/professional hazards of the crew department. Rain god does add to the woes many a times and with the threats of many more climate changes in the horizon, we probably need to think of better cover other than a regular umbrella!
However, the news from SIMS, Lonavala yesterday was rather heart warming. In spite of the incessant weeping cloud over head and the sunless gloomy blanket of the sky, the business went on as usual and 68 DNS cadets received their hearty farewell from the faculty and fellow cadets in the campus as scheduled.
Yes, that’s great news. That’s exactly what we need to work on when there are difficulties and roadblocks – sometimes natural, sometimes manmade. Be positive and the solutions do fall in place – not like monsoon rain but a soothing October shower!

The Great Traveller - Engines

Thoughtful design practices are found in nearly every part of a modern ship’s engine room and no more so than in the engines themselves. Just imagine the various antics they perform and with the same precision & finesse every time- Turn, Pump, Cool, Inject, Breathe, Exhaust and Power to name a few. During this endeavour what do they undergo - Corrosion, Erosion, Wearing, Burning.

Though otherwise they are generally treated tenderly by the ships staff!

Now let us take examples to understand how far the piston rings travel on two typical engines to understand them better.
Case 1:
A generator engine, 200mm bore, 220mm stroke 1000 rpm, running at constant speed, 80% MCR for (say) 300 days per year.
How far do the piston rings travel in that time ? Any guesses!!!

Yearly travel = 190,000 km

Case 2:
The main engine, 850m bore, 2500mm stroke 100 RPM, at sea for 300 days per year.

Yearly travel = 216, 000 km

Give it a thought, in a year each piston ring travels about 5 times round the world, a long and tiring travel indeed.
In other words in a year the rings in main engine travel about the same distance as those for the generator. This is not a coincidence as the maximum piston speed of most engines is selected for durability reasons to around 10 m/s irrespective of
engine size.
Now that we have seen what a traveler our engines are, let us give a though to see what the piston ring faces in terms of lubrication.
The oil that lubricates the rings and liners is scraped into a very thin film. At mid stroke, this film is at its thickest, being about 10 micron and yes that is less than the thickness of a human hair !! At the extremities of the stroke this thickness reduces to nearly zero. So in the engines there are a large number of piston rings travelling constantly for very great distances, separated from imminent destruction by an oil film thinner than a human hair, Amazing. Performing this magical feat constantly and reliably, often without even a thought from the engineers walking past. The only reason this can happen is because of the oil film itself.
So you see - It pays to look after your oil after all!!
By Mr Sanjeev Dubey, Technical Superintendent

 
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