Join Date: Apr 2005
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Still munching on my shoe leather. I remain unconvinced, but not unconvincible.
These are the points I'm having trouble wrapping my old balding head around:
The only wind a moving object is affected by is apparent wind. The True wind will affect apparent wind - but a moving object is only affected by apparent wind. If true wind and apparent wind are equal, the object in question is at rest. Am I correct so far?
I was confused when I initially looked at the video as I thought the propeller was acting as a turbine and turning the wheels. But now I understand that the wind is moving the entire vehicle causing the wheels to turn which in turn cause the blades to turn and thus it is a propeller. Correct so far?
The vehicle continues to accelerate with the wind propelling it and the blade also propelling it. This continues until the vehicle reaches the speed of the wind at which time the apparent wind is zero and the only thing propelling the vehicle is the propeller, powered by the wheels. Now this is where I start to get confused - the vehicle continues to accelerate. What causes this acceleration?
Okay, I'll bypass that point by assuming that the wind, which has been in the past known to fluctuate, slows down slightly. Now the vehicle is moving faster than the true wind and the apparent wind is from the front of the vehicle. At this point the propeller becomes a turbine, i.e., it is driving the wheels, rather than the wheels driving it. Is my understanding correct so far? And the vehicle continues to accelerate. I do not completely understand why it should continue to accelerate - maybe someone can explain this in terms the more simple minded (that is, those of us who eat shoes) can comprehend.
It seems to me that if the vehicle will accelerate with an apparent headwind, that you could turn the vehicle around initially and face it into the wind. Turbine from dead start turns the wheels and it would accelerate dead into the wind. Am I missing something or would this work?
Two more unrelated questions:
Can anyone suggest a good wine which would go well with shoe leather.
Can anyone tell me the correct spelling of 'unconvincible"?
Saltwater Suzi and Cap'n Larry
"A sailboat is a fickle mistress. Youíve got to buy her things. Youíve got to understand everything about her. What you donít know sheíll use against you." -Captain Larry
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