SLAM DIRECT
The physics of sailing
From Physclips: Mechanics with animations and film.
Joe Wolfe School of Physics, The University of New South Wales.
- How can a boat sail upwind?
- How can boats sail faster than the wind?
- Why are eighteen foot skiffs always sailing upwind?
We introduce the physics of sailing to answer these and some other questions. But first:
A puzzle.
A river runs straight from West to East at 10 knots. A 10 mile race is held: the boats sail downstream, from West to East. The first heat is held in the morning, when there is no wind. The second heat is held in the afternoon, when there is a 10 knot wind from the West. In which heat are the faster times recorded?
Where is Phil…?
Update:
Phil made contact with a realative in Queensland and is making his way there now. The family doesn’t know how he is getting there. Thanks to everyone who showed the family support during this difficult time.
Phil Yeomans
This post is VERY SERIOUS…
Phil Yeomans is a family friend of ours, and is the father of Melissa Yeomans who runs DeckHardware, one of our sponsors.
Phil is missing, and has been since Sunday night.
Popular MHYC sailor and industry identity Phil Yeoman’s whereabouts are currently unknown. Phil does not have his car or his mobile phone with him.
His daughter Melissa said today. ‘He left his home on Sunday night and we have had no contact with him since then.
‘What ever the reason we are concerned for his well being and would appreciate anyone that may have had contact with him to either contact Robyn Yeomans on 0418 209 215 or John Hurley through Middle Harbour Yacht Club 02 9969 1244.
‘We hope to hear from him soon and pray that he is safe.’
If you have ANY DETAILS at all, please call one of the above numbers.
Laser Umbrella
There are no words…
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