Windrush 14 rudders
Posted 15 December 2009 - 11:51 PM
no races at Wallagoot for a while (Dammit!). I might be able to supply aluminium boxes, hardwood, templates and shaping tools if you're interested in making some cheapies. It'd take about 3 hours each side, plus extra mucking around fitting them to the boat. Not worth it if you value your time, but if you've got time and want to have a go, let me know; firstname.lastname@example.org
Paper Tiger 2901 "Tigerdelic"
Posted 24 January 2010 - 04:05 PM
Posted 27 January 2010 - 02:07 AM
My solution was to shape some out of hardwood (Tassie Oak, otherwise known as Gunns logged glorious old-growth Mountain Ash).
I made a blank of the right thickness and outline shape, created a template, put a sanding disk on an angle grinder, and then turned the bit I didn't want into sawdust. Works a treat, lasted a year so far and still good.
The section is a parabolic elipse front edge, with flat trailing edges, similar to NACA0010 profile. I can email it to you. email@example.com
Some people saw the varnshed wood and said "It'll break! You have to fibreglass it!"
What they mean is fibreglass coated softwood laminate (cedar + maple), is the old standard. Hardwood is so much stronger it doesn't need fibreglass, but the thin edges are a bit fragile. Also, they warp if left in the sun.
Old Maricat blades are shaped marine ply. Same deal; heavy but strong & cheap to make.
Posted 10 February 2010 - 10:49 PM
Posted 11 February 2010 - 04:05 AM
Posted 11 February 2010 - 04:43 PM
Posted 11 February 2010 - 08:41 PM
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