I think most folk are getting rather worried about this FM 200 stuff -
"I'm acutely aware that an accidental FM200 dump would be like a bullet in the head......."
But please rest assured, the various manufacturers claim that it is not toxic at all - for instance, on this Q & A page http://www2.dupont.com/FE/en_US/prod...200_faq.html#8 they say :
8. "How can I be sure that DuPont™ FM-200® is safe for people?"
"Exhaustive testing has been conducted to assess the safety of FM-200®, giving it the most comprehensive toxicity database of any clean agent. In fact, FM-200® is so safe that it is used as a propellant in pharmaceutical inhalers that dispense asthma medications. FM-200® is a single, pure compound; there is no active ingredient in FM-200®"
The killer extinguishing system which is literally like a bolt to the head is CO2 - if you are in an engine room which is flooded with this gas you are pretty much dead instantly.
The same effect has often happened with maintenance crews on big ships going into tanks on the ships without breathing apparatus - there have been cases where there is no oxygen left in the tank (all of the O2 was probably consumed by rust) and the crew(s) have literally keeled over instantly.
Changing tack, I love those very neat remote closing devices on your engine room vents - these are basically following on from what many ships and commercial vessels have as standard and should (imho) be encouraged on yachts as well.
Even if commercial ships and work boats do not have remotely operated vent covers they are required to have manually operated flaps so that the engine room can be sealed shut fairly quickly in the event of a fire.
The little OSRV built by Alnmaritec (http://www.alnmaritec.co.uk/boats/bo...at_aln096.html) for the Barbados National Oil Terminal earlier this year has a pair of very simple closing flaps on the intake and extraction vents of her two engine rooms (she is a catamaran) - they are not very big, but the engines are only 150 hp each.
Last edited by Bajansailor; 24-11-10 at 20:25.
Here is a useful guide to Barbados - http://doyleguides.com/barbados.html
Take your point BJ but nevertheless there is still a significant risk to health and if inhaled in quantity, its less harmfull than Halon for sure but I would not want to be in its presence for more than a short while, best be out of there in the first place.
Last edited by Nautical; 24-11-10 at 23:27.
P.S. if any of you forumites want something similar then you know where we are!
Remember a couple of years ago now someone I think from Brighton marina started posting stuff and replied to threads etc. Stopped pdq I recall.
Have to say on this particular thread of jfm's he has been a super ambassador for Fairline and EBY for that matter. Praise where its due is not out of place.
Thanks Bajan, that's very enlightening. I think you're right - FM200 aint that bad. To summarise what I've read on it:
1. It puts out fire not be displacing/removing oxygen, but rather by impeding the chemical reaction that is combustion. At molecular level
2. To work, it needs to be at about a 7% concentration in the air.
3. It's not toxic
4. So if it goes off accidentally while you are in engine room, you are fine. It reduces the oxygen concentration by about 7%, but that's not going to harm you
5. If it goes off because of a real fire, then as it works on the fire some HF is produced. That's not a nice substnace but in the concentrations produced it is not any problem
So, there is no need to worry about an accidental discharge while you're spannering in the e/r
Good stuff then. Thanks again BajanS
I've a feeling Gerald Wainwright used to post on here occasionally, when he was MD of Sealine.Actually thinking about that a bit further I don't recall any regular poster from any of the mainstream manufacturers, why's that? Do they all have prohibition clauses in their contracts of employment?
.....But he was the MD, of course....
Itis apis spotanda bigon etoo
You have a very satisfied customer here for sure. As you know I have seen behind the scenes and so I appreciate how beautifully put together it is, in the areas you can't see as well as those you can
This kind of stuff will keep customers coming back to you. This evening Derek and Karl are having dinner in Istanbul with one of my business partners (I mean a partner alongside me in my/our firm) who is very keen on buying #73, currently sitting in the mould. He has followed the build of mine and we've exchanged lots of emails about how good it is. He currently has a s55 but is pretty keen on taking an s78. Of course he might not buy it - it's not a done deal yet, but my point is that your work is appreciated way beyond me, and the quality of what you're doing will turn into further orders.
Hey, if he buys it, he wont be able to come and watch the build much as he mainly works in E Europe, so he's asked me if I'll come down to the factory to look at it for him and get pictures. And you thought you were going to get rid of me next week
If you or any of the build team are ever down in the South of France (Antibes, near Cannes/Nice) on holiday or whatever, look me up and you're always welcome on the boat. Mike, Karl etc have my mobile. (Though, i'll probably find some jobs for you to help me out with!)
I'm back in Oundle next Tuesday
Last edited by jfm; 25-11-10 at 23:54.