Showing posts with label Warmth. Show all posts
Showing posts with label Warmth. Show all posts

Sunday, September 23, 2012

A tale of fire and ice

Well, not really much ice, more sort of rain and some cold wind but hey.. got your attention. But the fire, yep a real fire on the boat!

Intentional of course, and nicely contained in the welded metal firebox, nicely warming the boat to 29 degrees, and warding of that icy weather. Finally after many years of procrastination the wood heater is on the boat, and working exceptionally well.

It replaces the smelly little Taylors diesel heater that I never really bonded with. In fairness I did buy it from a garage sale for $100 and it really needed a bit of an overhaul, a very small diesel leak used to develop when it heated up and it gave of a slight whif of diesel... Yuk. 

This wood heater was of my own design, (or rather adapted from my friend Adrian's design). It is just big enough to fit a normal sized log, and has a  mesmerizing window, a secondary burning chamber, and enough controls to keep a concord pilot busy. 

I love it, I love the slightly smoky warm fug inside, the flickering of the flame through the door, and the radiant heat. 

I love the hot kettle simmering away on the top. I love playing with all the controls, stoking it, lighting it, and the lazy way the smoke curls out the chimney. Shame it has taken 6 years to build, and now I have it installed just in time for summer...

See the post on welding stuff for details of the tools I used and a photo of the door being made, I managed to source some heat proof glass to fit inside the scrap stainless steel door. It's welded up from 6mm (1/4") mild steel plate (that I also got from adrian, thanks mate!), and it weighs a ton.

The installation is not quite complete. Hopefully soon the stainless steel heat shields will be fitted instead of the cheap galvanized one, and some tiles will be glued on the floor. I also need to make a new stack top, the old one was washed overboard in the knockdown on the way to Antarctica. And finally weld up some fiddles and guards. But all in good time, I guess I have until next winter!

Maybe amongst this hive of activity I will find time to post a few things on here, my apologies for the long lapse. Some time soon my old man will get his website up and running about his book "Snow petrel". So soon I can post a link to that, and with luck it may stop him harassing me to put something about the book on here...

Ohh, Important stuff I nearly forgot, Playing with fire is something most of us grow out of when we are about five, I clearly have not yet achieved this level of maturity. However I am very careful about shielding, and do not leave the fire unattended. I was told by a firefighter that wood can slowly change into a more flammable state after years of exposure to "safe" temperatures. Then one day it bursts into flame at the same safe temperature it has always been exposed to. A homemade wood heater is also liable to nasty antisocial habits like belching carbon monoxide, flames, and hot embers, or worse. Be careful... 

Monday, March 7, 2011

Keeping extremities warm in cold weather

Just cleaned out my car today, and found an old pair of mittens left over from my Antarctic trips. (don't ask what they were there for, maybe skiing last winter?). But it got me thinking about my two favorite pieces of gear, My mittens and my boots.
Crappy boots and gloves gave us no end of problems in Antarctica
When we took Snow Petrel down to Commonwealth Bay we had the good fortune to have lots of advice and help from Don and Margie McIntyre, an two amazing people who have spent more time at Commonwealth Bay than anyone else alive. They lent us a iridium phone, some survival suits, and lots of other very useful bits and pieces, but unfortunately we had no good wet weather boots or gloves.

We tried heavy duty washing up gloves over woolen thermals, and took lots of socks and put foam liners in our sea boots. Neither worked particularly well. The insulated rubber gloves were initially great but got very smelly and were hard to dry inside. We ended up using hot water bottles and hand warmers alot, getting them set up before any big job like dealing with shorelines. Even so our hands and feet were often cold, and by the time we got back to Tassie we had numb feet for a few months due to a kind of trench foot? (any thoughts on the medical diagnosis would be interesting...)

On the trip on Blizzard across to South America I thought I had learnt more - the boots would be OK, not as cold, but I was worried about my hands, Steering for 5 weeks from an exposed aft cockpit (no dodger to hide behind). So I wasted lots of money on the best gloves and mittens.... They proved next to useless (never buy skiing stuff for the ocean), and my fingertips suffered the same numbness that took weeks to go away.
Expensive but... SO toastie and warm...

When I got to the Falklands on good advice I bought some very expensive bright orange Dunlop Thermo+ boots. These boots a bulky but surprisingly comfortable, amazingly warm, and easy to keep clean and dry inside. They are lighter than they look and quickly became my standard outside wear, even on long walks ashore in Patagonia. They totally solve the cold feet problem. No wonder all the Antarctic charter yacht crew swear by them. How I wish I had had them on Snow petrel...
Sexy boots hey... Me and Karen two hours walk up a ridge in the Beagle Channel. No blisters yet...

So just the hands to sort out... Well Spirit of Sydney had a decent dodger, so my hands survived better, and the peninsular is much warmer than the Antarctic Mainland. But even then my fingers still got very cold handling shore lines and such.

The final solution to the hands problem came from Siggy (Sigurður Jónsson) from Borea adventures in Iceland who was my excellent first mate (and a superb cook) on Spirit of Sydney. He kindly gave me his Icelandic fisherman's Mitts when he went back to Iceland. Apparently the are cheap and common over there (good luck trying to find any in Australia..).
The ultimate mitts (so far..), reversible liners for drying and washing, and totally waterproof




These have sorted out the hands.. Mittens are alot warmer than gloves and they are quick to remove for fiddly tasks, easy to dry by pulling out the liner, And totally waterproof. Spirit of Sydney had a tell tale of water from the main engine syphon break that filled a little bucket near the helm. These mitts were often dipped in the warm water to take the chill off. Thank you Siggy..


Winter grip gloves are very comfortable, quick and easy to get on and off and although not waterproof they are great for any fiddly jobs. They are still quite warm even when wet, and dry quickly. they are much more comfortable to wear than neoprene.  Neoprene gloves are good for those really wet jobs like running shorelines, but are rather unpleasant to wear for any length of time, and not really all that warm for general use. 

The problems with alot of the other boots and gloves is that they get progressively damper inside from sweat even if they keep the water out ok, so they are warm for 3 days then get colder and colder..(and smellier and smellier..) You need to be able to wash and dry the insides easily.

I have seen some neoprene boots and they look pretty good (any feedback appreciated), but I like the way the Thermo+ stays open and loose, pumping air around the boot with each step, expelling any damp manky air.. My socks seem to stay dry right though a cold watch.

I just need to find a great solution for my head (the Antarctic division DORK hat worked ok but looks abit stupid...) and I am interested if any of you have any thoughts on good cold weather gear for hands and feet at sea, after all Australia is pretty warm so my testing opportunity's are limited.

Cheers

Ben

PS   I have just found AAC has two great article's with lots of good comments on keeping hands and feet warm. Well worth a look... I am constantly impressed by the quantity and quality of articles and comments at AAC, many thanks to Phyllis, John, Colin, and all contributers.

Saturday, February 26, 2011

A High Latitude Dodger.

The dome needs abit of "De-icing"
I was Lucky when I bought Reiger, Jim Dilly had already put a canvas spray dodger on her. If he hadn't it probably would have taken me a few years to work out how great they are. I am sure I would have maintained that I liked the taste of salt water and by not having a spray dodger it improved my "feel" for the boat or some other utter rubbish along those lines, so Jim did me a big favor...

Reigers dodger had a fantastic canvas flap that zipped onto the back of the dodger and bungeed down to the cockpit completely enclosing the whole area under the dodger. With this fitted I could actually cook standing up in the companionway, inside my little canvas tent, warm and dry, even with driving rain from astern. The steam from cooking would rise and condense inside the dodger and not the cabin. Wet weather gear could be stashed either side of the hatch, out of the cabin, and in cold weather it kept alot of the heat in the boat, like an airlock, but still provided ventilation.  I could even sail with the flap on. and of course the dodger kept me warm and dry at sea, all up it was brilliant...

My only complaints were that I couldn't work out how to fit a perspex dome to the hatch, and when I was sailing across the Tasman on my own I needed to climb right out into the cockpit to have a good lookaround, This required wet weather gear and a harness, and waking up properly - and I usually got at least a face full of salt water..

When it came time to fit a proper dodger to Snow Petrel I thought long and hard whether to put a canvas dodger or a hard dodger on the boat. We had built a series of hard dodgers for a few boats up at Launceston. The designer/artist was my friend Greg, he has a great eye for a nice looking dodger and after 3 builds we had worked out a quick strong method of building a hard dodger, But I was worried about how one might survive a southern ocean breaker landing smack bang ontop of it, at least with a canvas dodger I could just straighten the frame and stitch it back together, If I had been stupid enough not to fold it down...

The answer to building a stronger dodger came when I sailed on 2041, one of Chay Blyth's challenge 67's. The dodger onboard 2041 was maybe abit "practical" looking but had very strong knees at the after end that also doubled as somewhere to lean against. After seeing this I decided to go with a hard dodger, and as a bonus I could just squeeze a dome under the dodger on the main hatch and another on top of the dodger, above the hatch, meaning I would be able to have a look around without leaving the security of the main hatch.

It looks like this.





1 - 18 inch 6mm perspex dome, absolutely amazing view, doesn't steam up and can be used from inside the hatch or inside the cockpit. It is high enough to have a good view forward. It is a feature that I wouldn't be without. For tropical sailing I might fit it onto a hatch so it can be removed.

Little green hatted man is warm, dry and very happy!
2 - Hand rails set inboard to serve as longitudinal stringers, and gives a comfortable seat on the edge of the dodger roof. By setting them inboard the are easy to hold onto when on the lee deck.

3 - The dodger top is 2 layers of 6mm plywood laminated into a curve. It also has glass sheathing and non skid paint. This is more than strong enough to jump on. I intend to put a mainsheet traveller on top of it at some point...

4 - At the aft edge of the top and the sides is an external laminated beam. Inside this is an aluminium boltrope extrusion to take the canvas flap, to close in the dodger. This Beam stiffens and strengthens the top. It also stops water blowing back from the dodger top into the cockpit. And It forms a good handhold, hence burying the aluminium track inside the wood to stop my fingers getting cold.

5 - Big plywood and glass knees strengthen the aft end of the dodger, they also have handholds and make a nice backrest, or place to lean against. They also give the canvas flap something to overlap to stop rain driving in. They are tied with several heavy layers of unidirectional glass onto the top of the dodger, and bolted to stainless tangs on the coamings.

6 - Cabin top is used as a step to get onto the dodger, it also makes the dodger look better to set it slightly inside the cabin edge, and it is easier to build.

7 - Windows are 4 mm perspex, designed to break before the dodger does...

8 - Dodger sides are 9mm ply, doubled in high load areas, with heavy biaxial fibreglass tape in all the corners. They are bolted through welded stainless steel tabs on the cabin top. a Sikaflex fillet seals it to the deck.
From Astern, a bit of food on the wharf to store somewhere...
I spent alot of time looking at the ergonomics, mocking stuff up and trying to balance looks with functionality. I am happy with the results. There is room to sit in the cockpit completely under the dodger totally out of rain, snow or spray, and I can steer from this position, peering out the dome for a good look around. I need to add a few small windows to the top of the dodger so I can see the jib luff from this position.

I shifted the main winches aft 6 inches or so so I had space to sit on the cockpit coaming alongside the dodger steering with the tiller extension. This is very comfortable and gives a great view.

The dodger got its test on the way down to Antarctica, It copped a big southern ocean breaker, landed right on top of it, knocked us down and got some water below. I was sure it must have broken a window in the dodger but they survived. At some point I can imagine a storm bad enough to destroy the dodger, but if I survive I will just build another one, If I built it strong enough to survive anything it would be far two heavy, instead it is designed so that it cannot damage the watertight integrity of the boat.

One big advantage of having a dodger is that you can dress lighter, meaning when deck work needs doing you don't overheat, sweat and then get very cold as can happen if you are dressed very warmly for a windy cockpit watch with no shelter.

I think the dome/dodger combination is a big safety factor in cold water, keeping crew dry and warm, but some experienced sailors like Rolf and Deborah off Northern light don't have one, using the dome on the main hatch and an effective windvane instead. And I must say that if I got a bigger boat I would probably have more of a pilothouse setup, but with a sheltered area off the back.

I have sailed on a few boats that have a dodger sheltering the crew at the front of the cockpit but not the helmsman at the back of the cockpit. In my opinion this is stupid, the helmsman should be able to get their body out of the worst of the wind and spray, and ideally duck and get their eyes away from a dollop of spray. I have had my eyes get so much salt water driven into them that I could hardly see, A sensible dodger would have solved that problem.

On Blizzard we really wished we had at least a half dodger over the exposed wheel to keep at least our hands dry (or a good autopilot...), but instead we had numb fingers and could only manage half hour tricks in bad weather. Spirit of Sydney had a big lexan dodger, covering most of the cockpit and giving the wheel some shelter, this worked well, and I could hand steer for hours in the worst weather. A big safety plus.
Now thats a dodger! All Polycarbonate on alloy frames, it goes right back to the helm, ideally the helm needs raising slightly for better visibility, but you can stand to the side and steer with you foot for excellant vis. Note the clutter on deck...
 My father got home from the trip on snowpetrel and quickly fitted a spray dodger and roller furling to their 45 foot gaff ketch, after the 30 years that we had to put up with being wet and cold, so at least he was convinced of the benefits. But he couldn't quite bring himself to add a dome. Saying it just wouldn't look right...

The original dodger that spawned provided the pattern for mine, Looks much sleeker on a 38 footer, Nice work Wayne, Greg and Grant. 
Gosh Dad a spray dodger sure would be nice.... Note the Reefed Staysail on a boom.

Note the slightly raked angle of the dodger, this helps remove the illusion of the dodger being droopy, very important as a level dodger top will often result in the side panels looking slightly droopy due to the camber and fact that the sides are narrower at the forward edge. 

Here you can see the lip at the aft end and the radius of the top. The inboard handrails are very good, providing a comfortable seat on the dodger. 
 Under construction, note the annex track buried all around the aft edge.






Another Sister dodger. 
Plenty of room under the dodger, just enough headroom, and your whole body is out of spray and rain.



The dome was fantastic, here I am still inside the hatch with the door closed, perfect 360 view and safely wedged in place. 
The only shot with the canvas closure flap at over the back of the dodger, Two bungees held it down so it was easy to lift and get out.It really kept in the heat, and kept out snow ,rain and spray.