A Better Rudder (for Inflatable Kayak)

thingiverse

I have made an adjustment to my previous rudder (http://www.thingiverse.com/thing:806945). Rotating the worm gear both adjusts the rudder angle and tilts it fore and aft. For normal steering angles (+/-20 degrees), the tilting doesn't affect steering, but if you crank the rudder all the way to 120 degrees, you can lift the rudder completely out of the water. The whole assembly straps to the back deck of my kayak (an Advanced Elements Convertible) and breaks down easily for transport. You will need to print the following parts (all with 0.2mm layer, 4 perimeter, 25% infill): 1. gear.stl 1. worm.stl 1. wormbracket.stl 1. bigpulley.stl 1. yoke.stl 1. bladepulley.stl 3. idler.stl 2. t-clamp.stl 3. tiedown.stl 2. u-joint.stl 1. spider.stl 1. handle.stl The largest part, the yoke, requires a 5" x 8" bed. All others can be printed on a 6" x 6" bed. You will also need: 16 8-32 x 1" screws 4 8-32 x 3/4" screws 7 8-32 x 3/8" screws 13 8-32 nuts 3 1/4-20 x 1" hex bolt 2 1/4-20 nuts 2 1/4" standard washers 2 1/4" fender washers 4 6-32 set screws 2 3/16" dia x 0.55" stainless steel rod 1 3/16" dia x 0.75" stainless steel rod 1 5/16" dia x 4.75" stainless steel rod 1 36" long x 0.75 dia aluminum tube 1 24" long x 0.75 dia aluminum tube 2. u-joint.stl Assemble the t-clamp onto one end of a tie-down piece and then onto another piece. Take one end of the nylon string, pass it under an idler pulley on top of the big pulley, wrap it around to other side and through hole in center and lock it.