Directorly Downwind Faster than the Wind

[hartiberlin]

Well, here is a video shot from behind the driver.

http://www.youtube.com/user/TraderTurok#p/u/2/39LhFo3P-bw

Too bad they are on this bumpy saltlake terrain, so they could not let it run
faster with shaking it apart...

Would have liked to see it go 100 mph !

[ramset]

Funny,
I just shared these vids with a friend that sells to all the big sailboat racers around the world and their zillion dollar boats,
His comment was "yes I know its a perpetual motion machine"

Never thought I'd hear those words from a fellow like him!

This is amazing!!

How do we do this with electricity or gravity ?
Push past the speed limit?

Something as simple as a sail that makes its own wind[apparent wind] and will do work indefinitely!

Good stuff!!

Chet

[Cloxxki]

Larger wheels are usually worth it, even if they add air drag. I could write books on the important of sufficient wheel size for a job. Some would wish I had, to I'd preach it less online and hope people would get the book.


Here's a brain teaser. As if this stuff isn't complicated enough as it is.

In the video's, we see a vehicle which has the 100% traction wheels 1:1 connected to the propellor, in whichever gear ratio and blade pitch.
Now, HOW VITAL is this (1:1 or otherwise) hard link to make such speeds possible?
Could selective braking on the wheels and/or the prop seperately, to keep spin ratios in a preferable zone, make the cart "think" it's outfitted with such a physical link?

So, the prop upon self-start wants to turn backwards but is withheld by the wheels, right? A one-way clutch on the prop could do that. But not get it turning the "wrong way" when the cart gets moving due to the force pressig against the uncooperative prop. Then, why not use an on the fly adjustable prop. Let the prop spin up while the cart is held in place. Adjust pitch to get maximum kinetic energy storage at high rpms. An additional flywheel could store some more, later to be used to boost the wheel.
Then adjust the prop pitch to the other side, effectively reversing thrust. Don't waste rpms, and crank it open. Clutch the flywheel to the wheels. Cart will accelerate, and hopefully cross the threshold after which the magic can occur without further gearing tricks. Prop speed and cart speed line up, and are from there on brake-adjusted. The flywheel is dropped, not needed for the run itself.

An air ship might need to start with a wire to an anchor, wrapped (indirectly) around the prop axle. Same as wheels on a cart.
Would, whel the wire runs out and off the axle, the ship be able to accelerate towards 3x wind speed? The around the world record could come into jeapardy then. Imagine hitting the jet stream and merely doubling the speed.
When it sounds too good to be true, it usually is. But could a simulation give the answer?

[ramset]

Clo
your goin to fast for me!This is a holy cow idea
Quote:
"Then adjust the prop pitch to the other side, effectively reversing thrust"
------------------------------------
You are a very smart fellow!
Having started life on this planet as an aircraft mechanic, I can fully appreciate where you are coming from!

WOW

gotta go back to work,thanks for the redirect![something to think about]

Chet

[Cloxxki]

Clo
your goin to fast for me!This is a holy cow idea
Quote:
"Then adjust the prop pitch to the other side, effectively reversing thrust"
------------------------------------
You are a very smart fellow!
Having started life on this planet as an aircraft mechanic, I can fully appreciate where you are coming from!

WOW

gotta go back to work,thanks for the redirect![something to think about]

Chet

Thanks Chet, appreciate it.
Being 100% uneducated I think sometimes allows me to think outside the box, into the obvious.

I'm pretty sure this has been invented before I wrote it. Like by a Wright brother too lazy to first dismount and then push his biplane rearward into the garage.

Too bad flywheels tend to be overly heavy to bring along for the few times they actually come to good use. Just my bold observation though. A flywheel can however be stuffed with KE indefinately, as long as the bearing is sound, the shape round, and the gearing up for it. If you let the car sit on the parking lot during the 9 days of your working day, being fed by the roofmounted prop, how much KE might it have stored? Might made for a sweet burnout down the office parking lot as you head back home.

The pitch flip would meet some good resistance (open a car door on the highway), being at top spinning speed, but then also might give a good initial kick to get up to a start, and the prop in sync.

I hope I can sleep before I have a Zeppelin freewheel its prop when having its tail pointed in the wind. Could it possibly be, that the negines internal resitance and mismatching rpms have kept a century of air ships miss out on a quick no-fuel orbit of the earth? Nah...