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post #21 of 35 Old 12-17-2012
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Re: Heavy winds?

CD,

That option only works if you are ugly! But being as you are the "BEST LOOKING MALE MOD" that drinking a cold beer with the wind behind does the opposite effect! Now if you were drinking a hot buttered rum, it might work!

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post #22 of 35 Old 12-17-2012
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Re: Heavy winds?

I figure it's just more of those nitrogen and oxygen molecules hitting your dacron. I noticed it in frostbite racing on those cold days back in the frozen northeast.

Okay, another question. Since colder is more dense, we heel more. But if we're up at say 12,000 feet on some mountain lake, are there just fewer molecules to start with? So would we heel less in 30 knots on top of Mount Everest than at sea level, given the same air temperature?

Are we faster in fresh water because it's less dense than salt and fewer molecules for the hull to have to push around? Or is it because we sink down more than in salt? Is cold water slower than warm water to sail through?

I'm just full of questions. I never think of this out sailing, only at desks with keyboards..
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post #23 of 35 Old 12-17-2012
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Re: Heavy winds?

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Originally Posted by Cruisingdad View Post
So basically, if i am sailing downwind and am drinking an ice cold beer, the wind blowing over it to my sails, my boat will go faster? Yet another reason to drink ice cold beer. Thank you Faster. Btw, if I put a fan behind my beer, will I go even faster (no pun intended Faster).

Brian

Problem is, Brian, the waste heat from your BBQs will undo all the good that cold beer did, esp considering the beer probably didn't last more than a few boatlengths!!
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post #24 of 35 Old 12-17-2012
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Re: Heavy winds?

If you would like some fun try to find an eb6 Pressure density calculator. IMHO You would be at your fastest in cold air, at sea level. in warm salt water. Slow Just the other way around High alt, cold fresh water lake, with a hot wind. Factor in the waves a small shallow body of water means smaller waves this adds speed if the surface turbulance is just right. How much is for an expert looking for a speed record . Most likely on a kite board? Since the Kites are behind. far beyond me. Regards, Lou

Last edited by Lou452; 12-17-2012 at 08:26 PM.
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post #25 of 35 Old 12-18-2012
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Re: Heavy winds?

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Originally Posted by blt2ski View Post
CD,

That option only works if you are ugly! But being as you are the "BEST LOOKING MALE MOD" that drinking a cold beer with the wind behind does the opposite effect! Now if you were drinking a hot buttered rum, it might work!

Marty
Please make sure to emphasize "... YOU ARE the "BEST LOOKING..." SOunds better that way. Also helps to keep my fellow male mods (the not good looking ones) in check!!

Brian

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post #26 of 35 Old 12-18-2012
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Re: Heavy winds?

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Problem is, Brian, the waste heat from your BBQs will undo all the good that cold beer did, esp considering the beer probably didn't last more than a few boatlengths!!
I added a fan too. And everyone knows that a fan will make you sail faster.

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post #27 of 35 Old 12-18-2012
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Re: Heavy winds?

I had to get some numbers. I would not stand behind this "science", but I had to get this out of my system. I used this site Air Density Calculator to figure out air densities. I used this site Airplane Aircraft Wing Lift Design Equations Formulas Calculator - Force to calculate lift of a wing. I used 1.5 for Cl for a sail.

So the jib on my Sabre 28 would theoretically have 10% more lift in 45 degree 40% relative humidity air than it would have in 85 degree 60% humidity air. That was fun.
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post #28 of 35 Old 12-18-2012
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Re: Heavy winds?

I like that Jkemp. Testing would be very hard but looks good enough on paper. I am not sure about the beer and the BBQ but that test might be more fun? Regards, Lou
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post #29 of 35 Old 12-18-2012
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Re: Heavy winds?

Alright, would my little home weather station (or your mast top anemometer) read higher wind speeds on a colder day? But a little dandelion poof blowing in that same wind would be going the same 12 kts regardless of temperature?

Keep the expenses low and the good times high.

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post #30 of 35 Old 12-18-2012
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Re: Heavy winds?

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Originally Posted by sealover View Post
Alright, would my little home weather station (or your mast top anemometer) read higher wind speeds on a colder day? But a little dandelion poof blowing in that same wind would be going the same 12 kts regardless of temperature?
The change in density produces more force for the same velocity... the anemometer speed is based on the velocity...I doubt it's affected by density changes.

Ron

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