Hi Walker, I haven't sailed on a 15, 000 ton cargo ship. The place to find this information is on a Classification Society Website, where you will find the rules that determine these things. If the plating is made of high tensile steel it will be thinner than if made of ordinary steel. If you were l...

I think you have got it pretty well covered. To me a blower would always be a rotary device, designed for large flow rates with a low differential pressure. Turbocharger, supercharger, Rootes blower, even an electric fan for aerating a sewage plant. A compressor on the other hand, may be reciprocati...

Hi, You were actually asking about the clearance volume of the cylinder, Martin told you how to calculate the swept volume. The clearance volume is the space above the piston when it is at top dead centre. The total volume or capacity of the cylinder is the swept volume plus the clearance volume. Th...

I think all the previous posts have covered everything except Fuel. UK Regulations used to be that you should have sufficient fuel on board for the estimated consumption to the next Port plus a safety margin of 3 days or 3% whichever was less. You can always be cought out by the unexpected. I was to...

Hi, This is a very good question. I suspect the reason that you have had no replies is that no one knows what a blast air line is. Apart from the blast air lines (Tuyeres) in a steel blast furnace, the only blast air lines I know of are completely obsolete. In the early days of the dastardly Dr Dies...

Hi again, Further to my earlier post I have had problems in the past with totally spurious cards caused by blockages or leakages of the indicator cock, or leakages on the screw thread on the cock connection to the indicator machine. If everything has been overhauled, all the fuel rack standouts on t...

Hi Diesel Dame, Taking leads is a way of measuring bearing clearances. Open up the bearing, and place lengths of lead wire (hence the name) across the bearing journal, refit the top half of the bearing and tighten down according to makers instructions. The lead wire will then be flattenned down to t...

Hi,

This may be a stupid question, but have you tried changing or overhauling the indicator cock itself?
Big Pete.

Hi Sorry I have not answered before, As fitted the crankshaft is perfectly aligned with the bearings, usually deflections are small except where they are influenced by the mass of the flywheel, hanging off the end of the crankshaft which will cause the the end of the crankshaft to droop. Try to visu...

Hi Guys, Thanks for your replies, they confirmed the way I was thinking. In the drawings the corrossion pieces are just short lengths of pipe, in the middle of the pipework between the sea inlet and the cooler and between the cooler and the overboard discharge. On the drawings we have a total of 6 p...

Can anyone help me? According to the drawings of the sea water system on my ship, Corrossion pieces were fitted in the pipe systems. Most of the system is made of 90% Copper, 10% Nickel Alloy, with chemical dosing pipes in stainless steel. There are some pipes in Galvanised steel, which I suspect mu...

I am not familiar with this system either, but in many systems where temperatures are measured electronically from a PT100 sensor, or similar, the system has to be calibrated. Probably somewhere in the instruction manual there will be instructions for this. In some systems you place the sensor in a ...

Crankshaft deflections will not reveal any problems with the crankshaft or the bearings. Even if the crankshaft is bent. They will reveal a problem with the alignement of the main bearings, this can be caused by a failure of the chocking arrangements or distortion of the Hull. This is why, in order ...

It all depends on what you have got. BSP ( British Standard Pipe Threads) are the same as metric pipe threads. If you try to screw a BSP pipe thread to an American NPT (National Pipe thread) fitting, they will screw together perfectly for one turn then lock solid (different TPI), trying to force the...

Think things through, I remember back in the early eighties I was 2/E on a Panamanian flag ship, managed from London and we received a circular letter from the company which copied some energy saving practices of a German Chief Engineer in the company. They included, switching off all the engine roo...