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DDFTTW - YouTube
Blackbird (wind-powered vehicle) - Wikipedia
Directly Downwind Faster Than The Wind (DDFTTW) - YouTube
DDWFTTW - Directly Downwind Faster Than The Wind
DDWFTTW - Directly Downwind Faster Than The Wind
The entire DDFTTW story, DUFTTW and DDWFTTW
DDWFTTW = a wind car that can go faster than the wind (also ... - Autoblog
High-performance sailing - Wikipedia
Downwind faster than the wind, part 2 - Boing Boing
newtonian mechanics - Can an system (wind sail) move faster than …