Inflatable Kayak Sailing - Episode 5 : Building the Rudder & Leeboards

Inflatable Kayak Sailing - Episode 5 : Building the Rudder & Leeboards
This was a continuation to 'Episode 2 : Improvements' to the kayak sailing kit as the drawings have been translated life-scaled Rudder & Leeboards to enable upwind sailing. It has been tested and passed with flying colours!
I had also been 'interviewed' by a proper sailor (he owns a full-sized sailboat!) when we went out sailing on the beach to film Episode 4 and he thought that the sailing kayak was an intriguing idea!
More details on www.snacksinthebackpack.com
Previous episodes on our playlist : • Wind Pirate Kayak Sailing
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[@jonhqueen3176]

Gracias amigo por esta idea

[@sitb-]

De nada. Sí tienes preguntas sobre el proceso, dímelo 😁

[@jurgensanides2427]

Hi, How big did ou make the leeboards (length / width)? As I understand this usually related to the length of the boat and the size of the sail? What size are they? Thanks!

[@sitb-]

Hello Jürgen, thanks for your question. The shape of the leeboard was scaled from a Tiwal 2 or 3 sailing dinghy. The size was 740mmH x 150mmW --- 2pcs. Yes, in theory they should be calculated based on the sail-size vs. vessel-length. But, I skipped that (to save time) and scaled the effective leeboard area at water level (for 2 leeboards) to compare to a Laser Pico's - Daggerboard effective area. I also found out (after a few versions made & tested) that a narrow-longer board works better when sailing at speeds greater than 6-8knots. And, wider-shorter (740x150) design works better in weaker winds or cruising or you're just learning to sail. Bigger area = bigger drag ...more flow resistance, but have better control. The shape may have some or little effect to our level of sailing. For a project I'm working on at the moment, I went with square-shaped leeboards, but finished a good smooth foil profile & gloss acrylic paint (for flow & waterproofing). I think, make something that's easy for you to source & produce. Fine tune it later as you go. If you have any questions, just ask. Good luck! -Harris

[@jurgensanides2427]

@@sitb- Thanks, that helps. I‘ll sure come back with more questions. At the moment I am still working on the stern for the rudder attachment - using wooden shelf supports and fiberglass. (The kayak is inflatable but has a hard-PVC bow and stern, so it works). Jürgen

[@sitb-]

I didn't have time to update the new rudder mount design I've had in storage. I've used a square rain water gutter profile, cut the sides slightly, then heat and fold both sides into a V-shape to hug the stern. It's so much easier to mount a rudder. I might post this on the website someday (hopefully soon) 😂

[@jurgensanides2427]

@@sitb- Yes, would be nice to see!

[@sitb-]

@@jurgensanides2427 Hey Jürgen, the rudder & leeboard design has been updated on the website for Episode 5. You can customize the dimensions to suit your materials. Good luck!

[@gonzaloguini8041]

Hi, I don't understand what you apply to the woods at the end. Is candle wax common?

[@sitb-]

Hi Gonzalo, yes that was just candle wax, same like the ones you would use on a birthday cake. It was applied to repel water and also as an additional protective layer. You can also rub the candle on the board like on a surfboard, then melt it down with a hairdryer or heatgun. Spread lightly with a paintbrush if needed. Let me know if you need more help. Good luck!

[@gonzaloguini8041]

@@sitb- Could you show me how the leeboard system is, [e-mail]. Thank you.

[@sitb-]

@@gonzaloguini8041 Hi Gonzalo, use this link to watch Episode 4: kzbin.info/www/bejne/iZWwkoOsjZabnrM ... Observe how the leeboards function. The leeboards simply reduces the sideways sliding of the kayak and improve forward movement of the kayak. Its very simple, just 1 telescopic pipe mounted to the 2 leeboards on the left/right side of the kayak. Once the leeboards are down, make the telescopic pipe shorter and 'clamp' the kayak body. That's it! I'll make another separate video dedicated in detail to making a leeboard system later, subscribe and stay tuned! Here's a new video that might also be of your interest 😁 kzbin.info/www/bejne/rIvJZ6d6rL6bsKc

[@gonzaloguini8041]

@@sitb- I don't understand how you screw the leeboards to a tube (hollow)

[@sitb-]

@@gonzaloguini8041 Hi Gonzalo, in the tube, I used an eyelet-bolt, drill a hole in the tube and put a bolt&nut through the eyelet-bolt to the eyelet-bolt won't slide out of the tube. I'll send you a sketch of what I mean to your email later. Let me know if you need any further details. 😁