My ER hatch is on the saloon deck and opens outward.
The fan is a automotive radiator fan, plastic mostly. Yes, although the main hatch is usually open, the smoke will fill the saloon. My main objective is to put the fire out. Then I can deal with the smoke later. I can see that ideally I need to continue the air duct to outside air. As it is there are three hatches and two large sliding windows that the smoke can escape from. I can suppose that a crew member can be opening these while I am attending to extinguishing the fire. Norm S/V Bandersnatch Lying Julington Creek 30 07.695N 081 38.484W > [Original Message] > From: Arild Jensen <[EMAIL PROTECTED]> > To: <[email protected]> > Date: 10/3/2008 8:00:30 PM > Subject: Re: [Liveaboard] fire fighting. ( was Reliablity) > > > > ahmet erkan wrote: > > 5. We must remove the smoke and replace it with air. > > 6. We blow cool air into the compartment because if we suck the hot > > air we might melt down the fan or the duct. > > > > Norm might be on the right path. I will wait for the explanation. > > > > REPLY > Good points! However I am still concerned about pushing the smoke into > the boat's interior. Hence the question of extraction rather than > in-feed of air. > > A number of fans blowers and such are designed for ignition proof > applications. these use metal blades and shafts plus metal ducting. > The vulnerable motor itself is mounted outside the duct path so heated > air ( or flammable fumes) are not in contact with the motor or any sparks. > > Presumably at least one hatch is open to the vessel interior to > enable a person to enter the engine room compartment and a blower > pushing fresh air into th eE/R would also push smoke through this > access opening. If no other opening was available then the fan would > simply pressurize the compartment slightly but soon the air flow would > stop when the fan's ability to pressurize the compartment reached a > limit. High volume fans typically have low pressure capability. > > A second thought. If the E/R hatch opens inward ( and many do) if you > pressurize the compartment with a fan blowing into the compartment, it > will be that much more difficult to open the door to enter and fight > the localized fire. This would not be true for boats with floor > hatches that lift up. > > regards > Arild > > > . > _______________________________________________ > Liveaboard mailing list > [email protected] > To adjust your membership settings over the web http://www.liveaboardnow.org/mailman/listinfo/liveaboard > To subscribe send an email to [EMAIL PROTECTED] > > To unsubscribe send an email to [EMAIL PROTECTED] > The archives are at http://www.liveaboardnow.org/pipermail/liveaboard/ > > To search the archives http://www.mail-archive.com/[email protected] > > The Mailman Users Guide can be found here http://www.gnu.org/software/mailman/mailman-member/index.html _______________________________________________ Liveaboard mailing list [email protected] To adjust your membership settings over the web http://www.liveaboardnow.org/mailman/listinfo/liveaboard To subscribe send an email to [EMAIL PROTECTED] To unsubscribe send an email to [EMAIL PROTECTED] The archives are at http://www.liveaboardnow.org/pipermail/liveaboard/ To search the archives http://www.mail-archive.com/[email protected] The Mailman Users Guide can be found here http://www.gnu.org/software/mailman/mailman-member/index.html
