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  #301  
Old 28th October 2021, 16:01
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Junkers flugmotor 205C (yes I know it's only one...)

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  #302  
Old 29th October 2021, 06:40
Engine Serang Northern Ireland Engine Serang is offline
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Originally Posted by Tim Gibbs View Post
I was asked to look at an insurance claim involving 2000 tonnes of duff fuel and that was seriously interesting :
Sharpen your pencil Tim because Duff Fuel is a growth industry. Off-Spec fuel can indeed be seriously interesting for Supers and Chief Engineers.
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  #303  
Old 29th October 2021, 15:41
Makko Mexico Makko is offline
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I'll second that, ES!

Going way back, we started to get reports of problems with Diesel plants throughout Latin America: Panama, Honduras, Dominican Republic, Colombia et al. The fuel pumps were wearing out very quickly and MAN B&W couldn't produce them fast enough. Just one plant, in Honduras, was the largest Diesel plant in the world when built, with 14x 16 cyl. engines, heat recovery and a steam turbine for an extra dozen MW. What was puzzling there were the deposits inside the pumps, on the injector nozzles an sticking piston rings.

With the first claim (Honduras), while I suspected microbial contamination, testing did not find this. The fuel preparation was good, quality certificates in order, so on and forth. All the plants received fuel from a major fuel broker based in Switzerland. Hmmm....Having joined the dots, the breakthrough came with one plant that collected and sent samples to Houston for independent testing. The testing facility kept witness samples of all the fuel that they tested. The plant was therefore able to get analyses of fuel samples prior to the problems starting and afterwards.

It resulted that the fuel was being "cut" with styrenes, industrial waste which costs money to dispose of safely. The fuel was being supplied from the USA, the worst culprit near New Orleans.

The problem was so serious that the plants were resorting to combing scrapheaps for any half-good pumps as MAN B&W couldn't produce them fast enough! Just in Honduras, the needed 224 fuel pumps, injectors and many pistons/rings/liners.

A very interesting case and challenging as an adjustment.

Rgds.
Dave

Last edited by Makko; 29th October 2021 at 15:48.
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  #304  
Old 1st November 2021, 12:55
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Originally Posted by Engine Serang View Post
Sharpen your pencil Tim because Duff Fuel is a growth industry. Off-Spec fuel can indeed be seriously interesting for Supers and Chief Engineers.
Interestingly,(depending on how much of a sad person you are!) the 2000 tonnes of fuel was duff but it hadn't damaged the engine as the owner claimed because it was possible to demonstrate that fuel hadn't actually been used at the time of the claim.
It is true that the engine was indeed knackered - primarily because it had run c25k hours without any maintenance, been using inappropriate cylinder oil and had probably used some pretty horrible fuels previously
Be careful what you claim for!
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  #305  
Old 1st November 2021, 15:05
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What was up with the fuel, Tim?
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  #306  
Old 6th November 2021, 12:08
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What was up with the fuel, Tim?
Can't remember the full details but there was certainly was a problem with the cetane number and I think also fines but once it was established that fuel couldn't be part of the engine related claim I wasn't involved
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  #307  
Old 6th November 2021, 16:21
Engine Serang Northern Ireland Engine Serang is offline
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Don't think I've ever been supplied with off-spec Lubricating Oil but Fuel Oil is a different kettle of fish. One wonders if the office cleaner fills out the BDN.
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  #308  
Old 6th November 2021, 19:17
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I have a feeling, ES, it is just a "stock form" with a few details changed!

BTW, in Ocean/BF, we had a small and efficient fuel test kit. It was just to check the bare minimum characteristics but worked. We also had one for LO after microbial contamination became known.

Then there was the Alaska HO, just a smidgeon over 1.0 relative density, the east arabian HO full of sand and the Texas HO full of waxes!!!

Best Rgds.
Dave
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  #309  
Old 7th November 2021, 13:15
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Quote:
Originally Posted by Makko View Post
I have a feeling, ES, it is just a "stock form" with a few details changed!

BTW, in Ocean/BF, we had a small and efficient fuel test kit. It was just to check the bare minimum characteristics but worked. We also had one for LO after microbial contamination became known.

Then there was the Alaska HO, just a smidgeon over 1.0 relative density, the east arabian HO full of sand and the Texas HO full of waxes!!!

Best Rgds.
Dave
And Bass Strait waxy oil It wrecked 3 Peilstick 2.2s (actually not that difficult) and resulted a 100 metre long wax candle in the bunker fuel pipe work
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  #310  
Old 7th November 2021, 22:51
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Yes, Tim! Hard times but, boy, did we learn a lot! Not only cause, but repair/remedy and future recommendations!

I remember the Honduras claim. When I asked if they were testing for microbial contamination, even though the plant engineers were very well experienced and qualified, I was met with blank an puzzled faces!

Rgds.
Dave
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  #311  
Old 17th November 2021, 14:28
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As you get older this becomes more and more appropriate ....
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  #312  
Old 17th November 2021, 19:50
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As you get older this becomes more and more appropriate ....
Oldest daughter recently got married..........! That, or change the lock and garage door code!
Rgds.
Dave
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  #313  
Old 28th November 2021, 15:15
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Omicron is an anagram of moronic.
If Greek letters are being used for covid variants, I wonder whether politicians will allow the use of Xi
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  #314  
Old 28th November 2021, 15:19
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Talking head on TV said they would not.
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  #315  
Old 28th November 2021, 15:41
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Omicron is an anagram of moronic.
If Greek letters are being used for covid variants, I wonder whether politicians will allow the use of Xi
They could use Diotis, if they persist with anagrams.
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  #316  
Old 28th November 2021, 21:12
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...... or Watts.
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  #317  
Old 28th November 2021, 22:57
Engine Serang Northern Ireland Engine Serang is offline
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Or twats.
9 10
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  #318  
Old 1st December 2021, 10:51
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Relativity explained:
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  #319  
Old Yesterday, 12:11
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Technology advances ... but there are side effects:
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  #320  
Old Yesterday, 17:12
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[QUOTE=Makko;40532]Yes, Tim! Hard times but, boy, did we learn a lot! Not only cause, but repair/remedy and future recommendations!

I remember the Honduras claim. When I asked if they were testing for microbial contamination, even though the plant engineers were very well experienced and qualified, I was met with blank an puzzled faces!

Rgds.
Yes, I could have once said The bugs ate my crankshaft. Well, actually was the City of Colombo's crankshaft - her third in 13 years. The first changed because of a design problem, the second 'cos it broke and this one just survived with a few bearings reground. A great engine the Doxford 75LB6
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