Showing posts with label keel. Show all posts
Showing posts with label keel. Show all posts
Friday, December 2, 2016
Making your drop keel or rudder
This has been an addition to the CNC cutting of the normal boat kit side.
Shaping a rudder or foil by hand can be quite time consuming, so we offer a laminated timber blank CNC shaped to the correct profile every 50mm, its then an easy job to chop the excess wood out and arrive at the correct shape required.
http://www.blogspot.com/2009/02/keel-and-rudder-foil-manufacture.html
This is the drop keel from a Didi Mini Transat Cruise which we shipped to Australia.
Other designs are also possible.
Roy
Shaping a rudder or foil by hand can be quite time consuming, so we offer a laminated timber blank CNC shaped to the correct profile every 50mm, its then an easy job to chop the excess wood out and arrive at the correct shape required.
http://www.blogspot.com/2009/02/keel-and-rudder-foil-manufacture.html
How easy can this be, just look at the time we save you!
This is the drop keel from a Didi Mini Transat Cruise which we shipped to Australia.
Other designs are also possible.
Roy
Saturday, November 12, 2016
Keel Mold
Having run to a standstill when a supplier of fasteners told me one month after ordering the screws that his supplier's factory was demolished..(yeh likely story Dave) I decided to start building the mold for my keel.
Using JB's plans for the keel, I ordered some pine from a local supplier, somewhat thicker than specified, in the expectation that it will be strong enough to contain the lead without having to bury it the ground, as John specifies. I want to be able to move the mold when pouring the lead - using steel tubing as rollers underneath the mold.
I read lots of threads on forums about lead keel pouring - and various solutions including coating the inside of the mold with water glass - but I'm going with a wood fire in a barrel enclosing the crucible.
I had been storing some gas cylinders which I planed to use as a crucible for lead smelting, I meanwhile came across a local company who was advertising some steel barrels for free - when I arrived to collect them he also had some old oxy-acetylene bottles which were also for the taking. So when home with my new crucible, removed to valve to vent the bottle - it was marked 1970 - so it was old but still had the smell of acetone emanating from it. Five hours later we finally managed to extricate the solid mass of firebrick from within...
Next, to deciphering the plan. At first it seemed a cryptic document, but I persevered and finally made sense of the plans. No doubt a seasoned boat builder would grasp it in an instant, but to add to the complexity, you need to make a special pattern ruler which accounts for the lead shrinking.
150 screws later, I have a mold ready for pouring...time will tell how successful it is..
Having used spacers to define to mold profile, I had to cut them out as the top of teh mold is narrower that the base..
Friday, October 7, 2016
Keel and foil shaping
We will no longer do the finishing works on rudders and foils but can still offer the CNC works on laminated hardwood blanks we can still produce.
http://www.blogspot.com/2010/03/didi-mini-drop-keel-foil-order.html
A drop keel to one of the Dudley Dix designs, check the link above to view the process.
Roy
http://www.blogspot.com/2010/03/didi-mini-drop-keel-foil-order.html
A drop keel to one of the Dudley Dix designs, check the link above to view the process.
Roy
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