Directorly Downwind Faster than the Wind

[Rapadura]

Thrust Calculator:

http://personal.osi.hu/fuzesisz/strc_eng/index.htm

How can this help us?

[Cloxxki]

Well
Very Cool that it was scaleable!
It seems to be an old school prop design , but there "must" be something special there!

Gotta be something special to over come all that drag and still make power to move?

@Clo
A Tiny replication?
I'll play![gotta be cheap]

Chet

Hi Chet, check this out for a build plan! http://www.youtube.com/watch?v=T-ArigMKhi4
Cheaper than a Mylow replication, I suppose.

Easiest to appreciate result (involving less running after the thing) would be to gear it to fight an upwind.

[ramset]

Clo
Sweet!

But I think where missing something ?

what kind of claims are these fellas making?
I can't find any claims as to where they are going with this?

Perhaps Greg [gmeast] has a point, or is this the best thing since canned beer?

Chet

[Cloxxki]

It's the best I've seen for sure, just it's not OU. It's the afterburner button we'd not found before.

Claims? A vehicle can take the wind's energy, and attain fast-than-the-wind speeds, I suppose?

The positive feedback loop seems able to extract more energy from the wind than it would be willing to give to a simple sailing cart. In stead of settling for equal-to-wind-speed, the feedback loop boosts cart speed, to a much higher equilibrium wind speed than 100%, limited only by the no-prop drag of the vehicle, and the size and efficiency of the prop used.

We'd not be surprised to learn that a 500ft tall wind turbine could extract sufficient energy to let a toy car on a race track reach 100mph, while the turbine is seeing only 10mph winds. We'd be more surprised to see the same fan, stuck on a relatively vehicle, in the same 10mph winds, hitting 30mph. Still, it's not all that different from an input-output point of view.

I asked Spork whether the world would need to re-think current technology because of his team's findings, and his answer was quite modest, but possibly true.
Wind turbine are not going to extract 3x more energy for the same diameter, I think.
Wind however, IMO does become a more viable (main) power source for a personal vehicle, in everyday traffic. We're learning a lot about storing on the fly (re)generated energy into batteries, and now wind power will need to be reconsidered for our high-speed traveling in low-speed winds. Wind is not just a drag factor that keeps changing, it's a power cource that keeps coming from different directions, every time you take a turn. The way I see it, we now have efficient wind propulsion systems for wind acting on a vehicle from any angle. The +/- 20 degress DDW and upwind, have been little exploited, expecially not on vehicles confined to narrow, straight roads.

[ramset]

Cloxxi

SO...........

If we can go faster than the wind,we should be able to go in "no wind"?

Why not?
I'm not being a wise guy, I can't understand this.

Once you exceed wind speed down wind the tell tales go slack!
I have NEVER seen this EVER!
and I sail past wind speed ALL THE TIME![never down wind].

Do you understand whats going on here?
Can you make "apparent wind" in no wind?
That would be a "miracle" No?

Chet