Topic ~
Hitia 17 build, Rudder
USA
Posted - 22
Jan 2002
| Steve Tellardin's rudder construction... | |||
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click on photos for large version |
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In a recent
thread, there was mention of how to shape the rudder blades. On my
Hitia 17, I used 12mm 7 ply marine plywood. Photo 1 shows how the
layers of plys help you "see" how your work is progressing. Photo 2
shows how I tapered from the front of the rudder to the rear. The
skeg is just the opposite, starting thin, then flaring to the full
12mm for attachment of the rudders. Photo three shows how it all
looks, and keeping the gap between skeg and rudder small will stop
any leakage. The principle is the same in larger rudders, that is to
create a smooth foil-like surface, not "flat" shapes that will
hinder performance. Everything is epoxied, and glassed. I used a
sander/grinder with a 7" 36 grit disk to do the shaping . |
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