Directorly Downwind Faster than the Wind

[hartiberlin]

Hi Chet,
what do you mean by going faster than the the wind on
just a catamaran ?

Do you mean having the wind behind you or is the wind then
blowing from the side ?

Probably only possible with a catamaran, when the wind
blows from the side, but not from the back as it is here.
So this catamaran thing does not count.
It is a totally different thing.

With this vehicle we don´t need wind at all.

If it is accelerated by the car to 14 mph WITHOUT wind,
it just takes off and generates its own thrust.
This will never wiork just with a catamaran !

Regards, Stefan.

[ramset]

Stefan
The prop is a sail
A catamaran [close to two times wind speed]
An Ice boat [5 times wind speed [200 mph]]
Yes the sail "must" be set on the boats at the "same"
angle of attack that the propeller has when it does its job in these vids.

30 to 45 degrees
this propeller does not know it is going "down wind"
It knows it see's the wind the same no matter where it is coming from.

This is "Exactly" what is going on [in regards to the prop]

Chet
PS I may not be describing this accurately enough
you can not ask a sailor about this ,only if  he sails hydrofoil[hobie tryfoiler]
catamaran or Ice boats.

[DreamThinkBuild]

The idea of the spinning propeller geared to the wheels on the tread mill gave me an idea. Why not stick the propellers on the end of a fixed bar which is free to spin on a central shaft. The moving ground could be a motorized lazy susan or turntable.

I had a hard time trying to find pieces in the software to conceptualize the idea, so I made a very rough design. I used Lego Digital Designer which is freeware and good enough to get the basic idea out.

The center shaft would be mounted on a spike or needle like a weather vane is and be freely turn-able. The gearing would be geared up, since I couldn't find the right gear pieces I used the same as reference in the drawing. Also the propeller blades would be much larger.

[Rapadura]

Well... So if we put this "wind vehicle" on a round track, or on a square track, or any kind of closed loop track, this will become a perpetual motion machine, even if the natural wind stops completely?

Cool...

Next step: use the vehicle motion to generate electricity somehow.

[hartiberlin]

Yes, good ideas !
I agree !

Many thanks for these ideas !

Regards, Stefan.