Voyager 2, Self Trimming Wingsail Trial on Lysterfield Lake 3 Feb 2019

[@robertpatterson4732]

Not sure why this hasn't been refined. Looks very promising. Thanks for sharing

[@JohnSemmens1]

The company Saildrone has done a great job refining this type of sail... www.saildrone.com/

[@robertpatterson4732]

@@JohnSemmens1 I see your model testing. Are you planing a full size version?

[@JohnSemmens1]

@@robertpatterson4732 No, not planning a full size boat. This is a prototype at about 1.2 metres long. The next boat will be about 2 metres long intended for ocean voyages.

[@robertpatterson4732]

@@JohnSemmens1 Thanks again for taking the time to share what you are doing.

[@fleursworkshop1453]

nice modell i wanted to build something like this by myself some time ago

[@peterworsley4699]

Dear John. Very interesting. When you say sail automatically controlled by trim tab, is it a similar system to my own system as described on www.sailwings.net ?

[@JohnSemmens1]

Hi Peter, Sorry,I had not seen your comment. I originally studied your website a few years ago when I was researching self-trimming wingsails, and it was quite valuable to highlight what was possible. I originally started to design a 3D printed cam and lever type control system for my models. But my background is electronics, so I swapped to an electronic solution, using Bluetooth to communicate between the main controller computer and the wingsail servo.

[@peterworsley4699]

@@JohnSemmens1 Thanks for answering - The beauty of these self trimming wingsails is that the boat goes well upwind and does not get blown backwards - because the L/D ratio of the wing is so good.