|Topic Review (Newest First)|
|03-08-2010 09:42 PM|
Originally Posted by TrueBlue View Post
|08-20-2008 10:05 AM|
Don't store the propane canisters below. They're prone to leaking, especially after being used once...
The best storage system for them is to make a "propane locker" for them out of Schedule 80 PVC pipe. The locker is basically a section of tube with end cap welded on the bottom, that has had a large 1/2" hole drilled in it. The tube is then fastened to a stanchion or the lifelines and the propane tanks are dropped into it. Another end cap is put over the top and fastened either by a hole drilled with a 1/4" fast pin or a piece of bungee cord.
Originally Posted by Joesaila View Post
|08-20-2008 08:25 AM|
|Joesaila||Just finished a second 150 mile sail around the outer cape to Nantucket, M.V. and the canal. Each trip lasted a week and there were 4 adults on board. The non pressurised [2 burner Origo] lasted on a single fill up at the start and there were no problems. [I would never try to fill it while sailing] Its not difficult at all to see the blue flame and the heat was very sufficient. I am looking for a way to make bread. [we don't have an oven, but I'm certain it can be done] We do have a propane grill for the rail and I would like to find out about safely stowing those small tanks below. Is there a locking box or system anyone is aware of?|
|08-20-2008 07:29 AM|
It seems clear to me that most people have made the mental switch to propane and find the risk acceptable. I was not sailing at the time, but I bet a similar change in perception occured in the 70s as gas engines were being replaced by diesel - after decades of use, gas became too dangerous. We learn to accept certain "truths".
I chose kerosene as a cooking and heating fuel on my C&C. I have young chidlren and feared a carless mistake was too high a risk for the convenience of propane.
You may find it ironic, though, that when I needed to repower, I replaced the old Atomic 4 gas engine with a rebuilt Atomic 4 gas engine. I hate the smell of deisel and could not find a documented case of a sailboat suffering an explosion for gasolene. Propane makes boats look like popcorn when all goes wrong.
BTW, I have a complete propane oven/stove, storage locker, aluminum tank, soelenoid system available for sale.
|08-20-2008 06:12 AM|
If you're really worried about the propane system, install an ignitioin proof blower fan, like what is found on in-board gasoline powered boats. It would be able to vent the boat rather quickly, removing the risk of the boat exploding.
IIRC, if you look at BoatUS's book, Seaworthy, which is based on their claim experience of 20+ years, you'll see that alcohol stoves, particularly pressurized ones, were a much greater danger. The problem with alcohol is that it burns with a near invisible flame and it is often hard to tell if an alcohol fire has been started, or if you've spilled the fuel.
Also when you try to extinguish an alcohol-fire, don't use water, since an inadequate amount of water will only spread the alcohol and flames, and it can often end up with the flames pouring down into the bilge and making the fire worse.
Yes, you can extinguish an alcohol fire with water, but it takes a lot more water than most people think. If you think about the fact that most hard liquor, 80 proof and stronger, is highly flammable.... that means that you only need 40% alcohol by volume for the flames to continue burning...
Yes, gasoline and propane can be an explosion hazard. Yes, they're both heavier than air. However, a proper fume detector and bilge blower setup can reduce the risks greatly. BoatUS's book also points out that very few gasoline or propane explosions happen on boats that are properly equipped with a bilge blower system.
User error is the biggest cause of galley fires—regardless of the type of stove used. The more difficult or complicated a stove is to use, the more likely the chance the user will screw it up. A propane stove, especially one with a piezo or electric igniter will generally be far easier to use than an alcohol or diesel/kerosene stove. YMMV.
One other point... where do you store the fuel for an alcohol stove. Most denatured alcohol I've bought comes in metal cans... and they tend to rust out fairly quickly. A properly installed propane locker will have an overboard drain for the gas, in case the tank itself or the regulator components start to leak. I have a composite fiberglass tank for the propane system on my boat, and it solves the problem of the tank rusting for the most part. Storing alcohol inside the cabin of the boat can be just as problematic as storing gasoline, and if it spills, it can also become an explosion hazard.
Originally Posted by Hartley18 View Post
|08-20-2008 03:19 AM|
Originally Posted by Sailormann View Post
It might not be a frequent occurence - but it does happen somewhere in the world on at least a yearly basis ...and if it happens, I'm quite sure you don't want to be on board at the time.
That would be an experience you would not live to regret.
|08-20-2008 01:30 AM|
In order for the propane to explode the gas to oxygen ratio has to be just right. It does happen of course, but it's not a frequent occurrence.
|08-20-2008 12:20 AM|
Originally Posted by Plumper View Post
|08-19-2008 11:29 PM|
I have a Dickenson Pacific that I use in cold weather and an alcohol stove that sits on top that I use in warm weather. My previous boat also had an alcohol stove (gimballed with and oven). The alcohol stoves (and the Dickenson) are slower than propane but both are easy to live with.
One point not noted here: if your propane stove does leak and the sniffer alarm goes off then what do you do? Getting a heavier than air gas off a boat at sea is very difficult. Spilled alcohol can be mopped up or will just evaporate. Spilled diesel, you all know that drill.....
A charter boat that had just disembarked a load of school kids blew up in Nanaimo Harbour last summer because of a propane leak. Even the most cautious and safe installations can have failures and the result is catastrophic, not just a fire that you can put out with water.
Sailboat explodes, sinks off Nanaimo
|08-17-2008 09:05 PM|
Originally Posted by sailingdog View Post
The metho dribbles into the pan under gravity, and, yes, if you're not careful you can get a decent fire going before the burners are pre-heated enough to start working. You have to be bloody unlucky to lose it out of the stove itself though!
Once the pool of meths is alight, we put a pan over the top to stop the flame reaching the deckhead (yes, it can get that high!!), but that's no different to leaving the gas on for a few seconds too long when lighting a propane stove (it's actually probably safer, 'cause at least you can see the alcohol!)
gmalan: It's a problem with no easy answer, but we're glad to hear you're okay. Now that you've got the fire out, you've got the fun task of cleaning up the mess. Fire exinguishers contain corrosive chemicals, so make sure you clean it all up and wash down with water where you can.
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