Hi, I agree that DWFTTW works, but this illustration does not quite explain it. Your sail is pivoting on a fulcrum anchored to the ground, so this design cannot go DWFTTW for very long -- in fact just as your video ends is the point at which you would lose thrust and slow down. So this demonstration does not explain the working of an actual DWFTTW vehicle.
Hi, I agree that DWFTTW works, but this illustration does not quite explain it. Your sail is pivoting on a fulcrum anchored to the ground, so this design cannot go DWFTTW for very long -- in fact just as your video ends is the point at which you would lose thrust and slow down. So this demonstration does not explain the working of an actual DWFTTW vehicle.
phizzer 1 year ago
@phizzer
See my other video DDWFTTW ANALOGY #2. It shows exactly what you are asking for: How to make this simple lever work continuously.
eyytee 1 year ago
Amazing! I just watched this lecture explaining it in depth. watch?v=Km9sW3kUfFw&feature=related
And, there's obviously room for improvement, although this team is like concorde on the day before mach 1 was breached.
Cloxxki 1 year ago
Excellent visualisation!
What would you guess (calculate) to be the maximum theoretical ground vs wind speed ratio, DDW? 2 minus friction, or even more?
Cloxxki 1 year ago
There is no theoretical limit on the vehicle speed / wind speed ratio (aside from c). But just like with gears there are practical limits.
Latest tests achieved more than 2x wind-speed, while going directly downwind:
watch?v=7SYvg40NHtc
watch?v=aDzWh9J1dk4
watch?v=c5VlX-xEk00
eyytee 1 year ago