The 99% eficiencies I mentioned were for the generator and motor only. I used a QPC of 0.65 for the powering calcs. I did consider that...
There have been a few sail systems tested in ships, and many proposed. Of the systems trialed so far, most have been either some variation on a...
You're right, I shouldn't have bothered commenting on your post.
Here's a video of a similar 1:1 model of his working in open water - [MEDIA] These are crude models, but they still work.
Seriously? No, it isn't. Firstly, you stated earlier that the gearing was a factor in the turbine boat working. From the video, clearly it is...
1) I have shown the direction of the wind and said that the diagram is for a boat sailing directly into the wind. Actually, it doesn't matter...
Yes, I have watched most of Peter Worsley's videos. Have you also seen this one with a 1:1 drive? [MEDIA]
Here's a vector diagram showing my thoughts on how a turbine powered boat might sail directly into the wind: [ATTACH]
Nothing Gonzo has said contradicts the fact that windmill boats can sail upwind. He is trying to explain the physics to you, as am I. I'm still...
Thinking about it a bit more, it may have little to do with the density difference. The viscous properties may have some effect, but the main...
This explanation is incorrect for a few of reasons: 1) Air and water have different densities. You can't really compare the two directly and...
In order for a windmill boat to work, all that is required is that the windmill blades need to be at a higher pitch than the propeller blades. For...
I see. You mean there is more thrust than wind drag, not total drag. You should clarify that in the thread title.
The boat will still have parasitic drag (windage). It would be possible to feather the windmill blades to the point where there is just enough...
It would be interesting to know what he meant by dangerous. Did he mean that the motion of the boat heading straight upwind was throwing the...
