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Search took 0.00 seconds. Search: Posts Made By: zydecotoad
Forum: General Sailing Forum 21-12-2009, 19:47
Replies: 155
Views: 26,284
Posted By zydecotoad
Then we'll have to leave it at that. We did get...

Then we'll have to leave it at that. We did get pretty off topic by the end here.
Forum: General Sailing Forum 21-12-2009, 13:54
Replies: 155
Views: 26,284
Posted By zydecotoad
But the pitot tube and anemometer do not work on...

But the pitot tube and anemometer do not work on the same principles.

The pitot tube measures the dynamic pressure of the air relative to the pitot tube by slowing the air to zero movement and...
Forum: General Sailing Forum 17-12-2009, 07:13
Replies: 155
Views: 26,284
Posted By zydecotoad
The pilot will be reading the same airspeed on...

The pilot will be reading the same airspeed on takeoff at sea level (high density) or high altitude (low density). That is because the airplane is equipped with a pitot tube airspeed indicator, which...
Forum: General Sailing Forum 15-12-2009, 09:12
Replies: 155
Views: 26,284
Posted By zydecotoad
Nick, I guess that my reaction has been to...

Nick,

I guess that my reaction has been to the implied idea that "Beaufort is better than knots" and if I am sailing without thinking in Beaufort scale, then I am less skilled.

When I am in...
Forum: General Sailing Forum 15-12-2009, 07:08
Replies: 155
Views: 26,284
Posted By zydecotoad
Hey Jedi, if you like using the Beaufort scale...

Hey Jedi, if you like using the Beaufort scale so much, why are you going to spend money on new wind instruments ? :devil:

On how to make a "wind force" anemomter, check out the wiki page. It...
Forum: General Sailing Forum 13-12-2009, 20:23
Replies: 155
Views: 26,284
Posted By zydecotoad
Roger, It is certainly hard to learn just...

Roger,

It is certainly hard to learn just from the written description, which is all some of us have to go by.
Forum: General Sailing Forum 13-12-2009, 11:55
Replies: 155
Views: 26,284
Posted By zydecotoad
I don't think I said anything about ignoring sea...

I don't think I said anything about ignoring sea state.
Forum: General Sailing Forum 13-12-2009, 09:43
Replies: 155
Views: 26,284
Posted By zydecotoad
Yes, but can't you do exactly the same with an...

Yes, but can't you do exactly the same with an estimate of wind speed, using the same observation techniques ? It's not the Beaufort scale per see that allows you to do this, but your experience in...
Forum: General Sailing Forum 12-12-2009, 07:02
Replies: 155
Views: 26,284
Posted By zydecotoad
Er, you might want to pick up a fluids dynamic...

Er, you might want to pick up a fluids dynamic book, force is "area * density * velocity squared".

But you are correct that the anemometers that use on sailboats measure true wind speed, not...
Forum: General Sailing Forum 10-12-2009, 19:18
Replies: 155
Views: 26,284
Posted By zydecotoad
The density of air does not change that much from...

The density of air does not change that much from the temperature.

0 deg C, 1.29
30 deg C, 1.16

That's about 10% difference between really cold and really hot. The same difference would...
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