Mikefriend 0 Posted September 19, 2023 Share Posted September 19, 2023 I’m looking to make or buy a wind vane tiller steering system for my H28 Yacht. Has anyone any ideas/plans/photos Quote Link to post Share on other sites
Black Panther 1,670 Posted September 19, 2023 Share Posted September 19, 2023 Here's a starting point Quote Link to post Share on other sites
waikiore 437 Posted September 20, 2023 Share Posted September 20, 2023 The H club many years ago had plans for one in their magazine , if you can find an old owner he may have a copy , I can tell you that it worked extremely well, even in the light. Quote Link to post Share on other sites
Risk Adverse 4 Posted September 20, 2023 Share Posted September 20, 2023 There are details of a self steering system on the H28 Association website that may be helpful https://h28.org.nz/2018/07/14/self-steering/ 4 Quote Link to post Share on other sites
Sail Rock 30 Posted October 13, 2023 Share Posted October 13, 2023 On 19/09/2023 at 2:52 PM, Mikefriend said: I’m looking to make or buy a wind vane tiller steering system for my H28 Yacht. Has anyone any ideas/plans/photos I am building a trim tab self steering system for a Chico 30 based on the Auto-Helm system supplied by Scanmar (who no longer sell the product, except their remaining inventory of spare parts). PM me for details. SR Quote Link to post Share on other sites
Black Panther 1,670 Posted October 13, 2023 Share Posted October 13, 2023 That's what we had on Chubasco. Brilliant Quote Link to post Share on other sites
mikef 0 Posted October 13, 2023 Share Posted October 13, 2023 Would you be willing to share your workings? Quote Link to post Share on other sites
Sail Rock 30 Posted November 29, 2023 Share Posted November 29, 2023 On 14/10/2023 at 9:56 AM, mikef said: Would you be willing to share your workings? Yes, I will send you a PM. Quote Link to post Share on other sites
Mikefriend 0 Posted July 2 Author Share Posted July 2 On 13/10/2023 at 2:15 PM, Sail Rock said: I am building a trim tab self steering system for a Chico 30 based on the Auto-Helm system supplied by Scanmar (who no longer sell the product, except their remaining inventory of spare parts). PM me for details. SR I have looked at so many diagrams for H28 but am bamboozled by the math and equations. Seems like it's vital to get size of trim tab abf vane correct relative to each other and rudder. I'm not going to spend money building something only to find it doesn't work. Any ideas that might be useful? Quote Link to post Share on other sites
Sail Rock 30 Posted 16 hours ago Share Posted 16 hours ago MF - My project is still a work in progress. A good reference is Bill Belcher's "Yacht Wind-Vane Steering". He suggests a trim tab width of about 20% the width of the rudder. I haven't bother with any "math and equations", apart from using the NACA 0010 figures in Belcher's book to design the trim tab's foil cross-section. I have included lots of holes in the trim tab control arm so I can adjust the amount to torque applied by the wind vane. I have also cast a bunch of small lead ingots that I can add or subtract from the windvane counterweight - apparently it takes a bit of playing around to get this right (feedback mechanism that dampens the wind vane motion). I plan to install my wind vane steering system this spring and trial it over the summer - fingers crossed! You might find the following FB group of interest: Homemade Self Steering Wind Vane. It has a video of a Monitor horizontal windvane being used to operate a trim tab on an H28 style rudder. https://www.facebook.com/share/g/ULaZiQo1smU4gei9/ Regards SR Quote Link to post Share on other sites
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