Prototype Propeller for kayak

thingiverse

A simple little atration that I knocked together. Use 8mm threaded rod to create the drive shaft or long hexhead bolt if you can get them. I printed mine with 20% square infill Public domain because it's alpha, I am yet to test it on the water, your mileage may be awesome or it may suck, when testing experimental stuff on the water, wear a life jacket p/s sorry for all the edits, getting use to this new fangled editing system in thingiverse Print Settings Printer Brand: RepRap Printer: Prusa i3 (sintron made) Rafts: No Supports: No Resolution: 0.2mm Infill: 20% square Notes: Prusa i3 is rocking block bearings with metal ally base (stock is 3d printed bearing holders w/ acrylic Y carriage) Still using stock hot end (new hot end in the mail as it's on my desk and shakes my desk quite violently) Sliced in Cura Post-Printing Drilled out the center hole with an 8mm drill bit (diamensions where a touch out), but hex head was a perfect fit. Removed any stray bits of filament How I Designed This I basically did a cylinder and then rotated the rectangular fins around the axis of the cylinder. I lucked out and the dimensions fitted perfectly I then did a difference on top and bottom to flush off the edges of the fins to make printing easier. Test Results First Test Results tl;dr It works! and it works quite well!!! Longer write up: Took it out onto the lake Got my Glide Reflection kayak up to 6km/h (approx 3.2 knots) with a 1.2 meter (about 4 ft) of M8 (approx 0.31 inch) threaded rod and a ryobi cordless drill (max free spin RPM is approx 1200 RPM) Would have gone faster but driving the kayak, off balance with a really really flexible drive shaaaaaaaft, driving it off center, meant that my slightly warped kayak (they screwed up the rotomoulding it seems) would do a great big circle. More coming soon... Next time going to test the other design to see how it works