Posted: Mar 05, 2011 9:13 am
I don't get this either.
In the video quite a deal is made when the ribbons fluttering from the mast start being blown to the rear of the craft, this not only shows that the craft is now moving faster than the wind, but it also would seem that it would mean that the wind is now acting to slow the craft down. Or has the pitch on the propellor changed to now provide forward force to the cart even though the wind is now from the front? If that is the case why wasn't it mentioned?
Variable pitch propellors are non-trivial things, you notice if you happen to build one.
Just a thought and a bookmark, this is counter-intuitive to me and I'm skeptical.
In the video quite a deal is made when the ribbons fluttering from the mast start being blown to the rear of the craft, this not only shows that the craft is now moving faster than the wind, but it also would seem that it would mean that the wind is now acting to slow the craft down. Or has the pitch on the propellor changed to now provide forward force to the cart even though the wind is now from the front? If that is the case why wasn't it mentioned?
Variable pitch propellors are non-trivial things, you notice if you happen to build one.
Just a thought and a bookmark, this is counter-intuitive to me and I'm skeptical.