I am designing a dream boat approx 100' in size and likely to use Junk Rig sails for ease of use as I would like to sail/power around the world and visit more archeological interesting countries.

 

I am now imagining a 45° angle of a wide and deep reinforced transom below the water line to add thrust from pitching.

 

The idea is based upon other wave power models

 

Example video...

 

https://www.youtube.com/watch?v=UWpxtfmpVD4

 

Instead of using the rear wing as in video I would only capture the downwards pitch in my design.

 

There is a Wave Powered boat that has crossed The Pacific (to Hawaii from Japan).

 

Any ways to stop the bow from having reverse thrust might be helpful and am thinking more of a V hull or sharp lines and chines to break the bow wave.

 

Any thoughts?

I am designing a dream boat approx 100' in size and likely to use Junk Rig sails for ease of use as I would like to sail/power around the world and visit more archeological interesting countries.

 

I am now imagining a 45° angle of a wide and deep reinforced transom below the water line to add thrust from pitching.

 

The idea is based upon other wave power models

 

Example video...

 

https://www.youtube.com/watch?v=UWpxtfmpVD4

 

Instead of using the rear wing as in video I would only capture the downwards pitch in my design.

 

There is a Wave Powered boat that has crossed The Pacific (to Hawaii from Japan).

 

Any ways to stop the bow from having reverse thrust might be helpful and am thinking more of a V hull or sharp lines and chines to break the bow wave.

 

Any thoughts?

This will simply create more drag most of the time. Except at relatively low speed and relatively fast downward pitch/stroke of the transom there will be more drag than thrust, and even then the upward pitch/return stroke will negate the overall effect.

 

I have propelled a standard canoe while standing on the gunwales, one leg on each side, in calm water, but the effective area was much closer to 5 degrees than 45, and being at the surface pulled on air rather than water on the return stroke.

 

The example in the video works very differently.

Edited June 16, 201411 yr by J.C.MacSwell

@ JC,

 

Thanks for responding. The mermaid 2 looks like this and crossed the pacific just on wave power, but it was only 3 knots average..

 

 

 

I was hoping to build similar effect into design, but have lots of time. No big deal as sails are fine, but I don't want any regrets with that kind of money.