Tuesday, October 20, 2009

Tech Tip Tuesday


Planning ahead to get a design where the parts all blend well is sometimes hard to do with my students. Most have not seen what is possible when building a strip canoe in terms of wood types and designs. I try to bring books into the first class to point them in the direction of resources that will show both interesting and unique designs.

Before they get started with building a boat, I encourage them to draw a sketch - even if it is a very rough sketch, showing what the feature strip might look like, what colors or wood types they would like. I also encourage them to pick good woods that blend or contrast nicely, woods with interesting figure or grain and woods of appropriate hardness for the part of the boat it will be used on. There is really a lot to consider even on a small boat with regard to the stems, gunnels, seat, thwart and decks.

While the books and on-line resources are great, there is sometimes no getting around looking at finished boats. That's why I encourage my students to go look at boats at places like the Maine Boatbuilder's Show, The WoodenbBoat Show and the John Gardner Small Craft Workshop. They are outstanding opportunities for a student to see what is possible and to dream a little bit about what they might like.

So sketch, plan and dream and have some pieces of scrap around so you can think about color and grain as you plan your next boat!

Monday, October 19, 2009

Best News Article Title

From the Oakland Tribune:

Animals rights activists

dog Michael Vick

My $0.02?

Be kind to animals.

Sunday, October 18, 2009

Frosty


Opening up the barn where we store the boats this past Saturday, we were greeted with this frosty sight. It's getting to that time of year where we have to put the canoes away on the Sunday morning after class. The reason is the adhesives we're using. Wood glue (depending on your manufacturer's recommendations) needs to be at least 50 degrees Fahrenheit to cure properly. Epoxy also needs to be warm enough to properly as well. Again, the type of epoxy and the hardener speed will allow for different curing speeds and minimum temperatures.

If you don't let the glue or epoxy cure in warm enough temperatures, problems occur. The wood glue, if it freezes, turns bright white and the glue joints are weak. Glue in the bottle needs to be kept warm as well - while some glues will tolerate freezing and thawing, some will not and will "chalk up". Epoxy generally either will not cure or the cure will slow down. Epoxy curing is both temperature and mass sensitive - the more of both, the faster the cure.

Simply stated, we leave the boats in a "room temperature" environment overnight to make sure that the glues and epoxy have cured properly. After that, the boat can get as frosty as the one in the picture above.

Wednesday, October 14, 2009

Wordless Wednesday


Photo taken at St. Michaels, MD - Mid-Atlantic Small Craft Festival.
Beautiful photo courtesy of Jonathan Drake.

Tuesday, October 13, 2009

Tech Tip Tuesday

Ultralight.

Or so I hope.

As you know, we've been looking at ways to make a 15' long canoe and forms levitate. Well, OK - I'd like it to levitate, but physics and gravity have intervened. Here is what we have done so far to make things a bit lighter.

We cut out material from the plywood forms in areas where it wasn't necessary. We limited the amount of material we took off to try to keep from having thin sections that would warp. This is what one of the patterns looks like after being "lightened":


We weighed the pieces that we cut out of all of the patterns for this canoe. It amounted to 14.5 pounds of material that were removed. Quite a substantial savings!

We're also shifting from a strongback made from dimensional lumber to one made with a combination of sheet goods and small amounts of dimensional lumber. The picture below shows the sample beam that was made up earlier. I haven't weighed it yet, but by just picking it up, I know it is lighter than our older designs.


The picture below shows the beam from the bottom. It is a 1/2" thick plywood deck with 1/4" luan sides and 2x6" blocking. It is a remarkably rigid structure. The sides are glued and screwed to the plywood and blocking.


A quick view of the barn where the boats are all stored for the moment. It may look like a bit of chaos, but we know where everything is!

Monday, October 12, 2009

Fall Arrived


It seems we went from days in the 70's to frost at night and highs in the 50's with the blustery Fall wind in no time at all. This past weekend, we went to a local Fall Festival and had a wonderful time. My DW put up a great and detailed post here. I'll be a bit more brief about it but let you enjoy some of the sights of the season.

Harvest decorations in the town hall. This is a small sampling of those to be seen around the building and around the town.


I wish I could share the sounds. The whistling wind and the rattling of blowing leaves, the crisp "crunch" when you step on them.


The smells, too. The faint spice of woodsmoke in the air, fried dough with maple cream (one of my favorite guilty pleasures...)


The feel is unmistakable. A frigid bite in the air and then the feeling of warm sun on you as the clouds passed.


Yup. Looks like Fall is here to stay for a bit.

Thursday, October 8, 2009

Oops!


Somali pirates attack French

military flagship

NAIROBI (AFP) – Somali pirates attempted to storm the French navy's 18,000 tonne flagship in the Indian Ocean after mistaking it for a cargo vessel, the French military said on Wednesday.

The crew of La Somme, a 160-metre (525-foot) command vessel and fuel tanker, easily saw off the brazen night-time assault by lightly armed fighters on two lightweight skiffs and captured five pirates, a spokesman said.

"The pirates, who because of the darkness took the French ship for a commercial vessel, were on board two vessels and opened fire with Kalashnikovs," Admiral Christophe Prazuck said in Paris.

La Somme is the French command vessel in the Indian Ocean, overseeing French air, sea and land forces fighting Somali pirates and hunting terrorists under the banner of the US-led Operation Enduring Freedom.

Officers on the ship have directed commando operations to free French hostages in the hands of Somali pirates.

The pirates tried to flee when they realised their mistake but were pursued by French forces who, after an hour-long chase, caught one of the skiffs, Prazuck said.

On it they found five men but no weapons, water or food as the pirates had apparently thrown all of the boat's contents overboard, the spokesman said.

A Western official at sea in the area, speaking to AFP on condition of anonymity, said that there had been an exchange of fire between the warship and the pirate launches.

"One of the skiffs managed to get away in the night because La Somme was busy with the first pirate boat," he said.

"Despite the arrival of other vessels, they haven't yet managed to find the second boat," he said, adding that many warships in the area were busy hunting another group which attacked a cargo ship off the Seychelles on Sunday.

The world's naval powers have deployed dozens of warships to the lawless waters off Somalia over the past year to curb attacks by pirates in one of the world's busiest maritime trade routes.

La Somme was operating 250 nautical miles (460 kilometres) off the Somali coast, on its way to resupply fuel to frigates patrolling shipping lanes as part of the European Union's Operation Atalanta anti-piracy mission.

This was not the first time that Somali pirates have mistakenly attacked a French naval vessel. Several pirates were captured in May when they attempted to board a frigate in the area.

Somalia has had no proper government since it plunged into lawlessness after President Mohamed Siad Barre was overthrown in 1991.

The country is riven by factional fighting and pirate gangs operate freely from several ports along its Indian Ocean and Gulf of Aden coasts.

According to the environmental watchdog Ecoterra International, at least 163 attacks have been carried out by Somali pirates since the start of 2009 alone, 47 of them successful hijackings.

Last year, more than 130 merchant ships were attacked, an increase of more than 200 percent on 2007, according to the International Maritime Bureau's Piracy Reporting Centre in Kuala Lumpur.

Pirates have in recent weeks resumed attacks with the end of the monsoon season. Last week Somali gunmen captured Spanish fishing boat The Alakrana with 36 crew members in the Indian Ocean.

The US Maritime Administration warned last month that the end of the monsoon season was likely to bring an increase in piracy off Somalia and urged shipping companies to be vigilant.

Calmer waters allow pirates, who often operate in small fibreglass skiffs towed out to sea by captured fishing vessels, to hijack freighters, trawlers and private yachts. Cruise vessels have also been attacked.

(Perhaps it's just me, but attacking a French Navy ship sounds like a really, REALLY bad idea.)