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Old 12-04-2018, 15:12   #1
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Is this sailing?

This sailboat concept can take wind head on:

But is this sailing?

What if you could have a power unit based on an electrical motor, a fuel cell with on-demand hydrogen production with a huge autonomy, would you give up the sails? Is it still sailing?
These power units may come in a future not so distant.
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Old 12-04-2018, 15:15   #2
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Re: Is this sailing?

Ha ha. :-)

But it still won't take wind head on and make ground.
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Old 12-04-2018, 15:41   #3
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Re: Is this sailing?

How do you reef that?
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Old 12-04-2018, 15:47   #4
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Re: Is this sailing?

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How do you reef that?
https://www.walmart.com/reviews/product/43110133
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Old 12-04-2018, 15:56   #5
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Re: Is this sailing?

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How do you reef that?
Lol - really good question :/
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Old 12-04-2018, 16:35   #6
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Re: Is this sailing?

It is obviously a motor boat; not a sailboat.
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Old 12-04-2018, 16:36   #7
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Re: Is this sailing?

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How do you reef that?
Changing the pitch of the windmill blades.
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Old 12-04-2018, 16:42   #8
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Re: Is this sailing?

WIND POWERED SHIPS MARINE RENEWABLE ENERGY RESEARCH ROTARY SAILS
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Old 12-04-2018, 16:49   #9
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Re: Is this sailing?

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It is obviously a motor boat; not a sailboat.
It runs with the wind. It is mechanically coupled to a prop.
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Old 12-04-2018, 18:08   #10
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Re: Is this sailing?

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It is obviously a motor boat.
This has been tried before but never caught on. I remember a guy in New Zealand had a modified Yachting World Diamond monohull with windmill power probably 30 - 40 years ago, and there was also a large Tennant catamaran. The achillies heel is downwind. The strong point is vmg upwind. I can't even imagine it being practical on a mono. I think its pretty much a one trick pony. I don't know how you would define it though, its wind powered, not engine powered.

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Old 12-04-2018, 18:47   #11
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Re: Is this sailing?

I think there are problems with gyroscopic effects in big waves. using counter rotating propellers can help, and it would also boost the power as well, but complicates the design

This obviously is very poor performance compared to sails in all angles except upwind.

Now, what about using kites most of the time for long runs? Use the windmill near shore.
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Old 12-04-2018, 18:51   #12
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Re: Is this sailing?

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I think its pretty much a one trick pony. I don't know how you would define it though, its wind powered, not engine powered.
IMNSHO:
It's definitely a power-driven vessel. The fact that the power is derived from a wind turbine is irrelevant. It's only a sailboat if the force of the wind is directly transferred to the vessel's motion through the sails (and their rigging).
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Old 12-04-2018, 19:15   #13
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Re: Is this sailing?

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I think there are problems with gyroscopic effects in big waves. using counter rotating propellers can help, and it would also boost the power as well, but complicates the design

This obviously is very poor performance compared to sails in all angles except upwind.

Now, what about using kites most of the time for long runs? Use the windmill near shore.
These things have very large props turning at slow speed I think so you would want to get it out of the water to reduce drag. A variable pitch prop that size would be pretty spendy I would think.
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Old 12-04-2018, 19:57   #14
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Re: Is this sailing?

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Ha ha. :-)

But it still won't take wind head on and make ground.
I read about this boat years ago. Apparently dead upwind was it's best point of sail.
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Old 12-04-2018, 20:27   #15
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Re: Is this sailing?

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