Cruisers Forum
 

Go Back   Cruisers & Sailing Forums > Search Forums
Reload this Page Search Results
Cruiser Wiki Click Here to Login
Register Vendors FAQ Community Calendar Today's Posts Log in

Showing results 1 to 20 of 20
Search took 0.00 seconds. Search: Posts Made By: cwyckham
Forum: Monohull Sailboats 29-06-2012, 16:11
Replies: 266
Views: 82,206
Posted By cwyckham
Re: Capsize Ratio's

Well, we do build gliders so that they are safe to crash, so maybe not the best analogy. How about this: Every vehicle is a compromise. You want to design a boat that is good at sailing and...
Forum: Monohull Sailboats 26-06-2012, 22:06
Replies: 266
Views: 82,206
Posted By cwyckham
Re: Capsize Ratio's

Well, there's nothing more in Garrett's book on calculating the impact force, so I went looking for Jordan's stuff. I forgot how great it is. Especially the Coast Guard report should be required...
Forum: Monohull Sailboats 25-06-2012, 14:57
Replies: 266
Views: 82,206
Posted By cwyckham
Re: Capsize Ratio's

Agree that weight has nothing to do with strength (not directly, anyways). I've been a bit puzzled myself over the metod of calculating forces in a drop. Easy to do onto a solid. Not so sure about...
Forum: Monohull Sailboats 24-06-2012, 21:46
Replies: 266
Views: 82,206
Posted By cwyckham
Re: Capsize Ratio's

If there is "twice the structure to withstand it", then you are saying it' twice as strong, so the strength to weight ratio is the same and the boats will behave the same. If the weight of one is...
Forum: Monohull Sailboats 24-06-2012, 21:39
Replies: 266
Views: 82,206
Posted By cwyckham
Re: Capsize Ratio's

Thanks for your great thoughts, you obviously know of what you speak. Interesting about the wood sheathed in fiberglass. I think they call that "cold molded?" Supposed to make great boats. Jim's...
Forum: Monohull Sailboats 24-06-2012, 09:50
Replies: 266
Views: 82,206
Posted By cwyckham
Beautiful! You've hit on a great thought...

Beautiful! You've hit on a great thought experiment.

Now earlier you said that hitting the trough was like hitting a wall. I've been using the same approximation. So let's add to your thought...
Forum: Monohull Sailboats 24-06-2012, 08:51
Replies: 266
Views: 82,206
Posted By cwyckham
You have the image right. It is exactly like...

You have the image right. It is exactly like crashing into a wall. And that is why momentum and not speed is what is important to determine the damage done.

which identical truck will sustain...
Forum: Monohull Sailboats 24-06-2012, 00:11
Replies: 266
Views: 82,206
Posted By cwyckham
Interesting. But either strength or weight isn't...

Interesting. But either strength or weight isn't the question, but the ratio. I'd be surprised if traditional wooden designs can match modern plastic boats.

The waves aren't really breaking onto...
Forum: Monohull Sailboats 23-06-2012, 22:06
Replies: 266
Views: 82,206
Posted By cwyckham
Not sure why everyone is assuming exotic...

Not sure why everyone is assuming exotic materials. He said what is important is strength to weight ratio, not just strength.

Just about any modern boat will have better strength to weight than...
Forum: Monohull Sailboats 23-06-2012, 10:30
Replies: 266
Views: 82,206
Posted By cwyckham
?? A race boat is built as light as possible....

?? A race boat is built as light as possible. They weigh a fraction of the weight of an old full Keeler of the same size, plus their center of gravity is lower.

Of much more interest to me,...
Forum: Monohull Sailboats 22-06-2012, 21:34
Replies: 266
Views: 82,206
Posted By cwyckham
Re: Capsize Ratio's

Ross Garrett's "Symmetry of Sailing" offers an interesting perspective.

He basically says that the static stability curve has very little to do with a yacht capsizing in real life. The sails will...
Forum: Monohull Sailboats 16-06-2012, 16:57
Replies: 266
Views: 82,206
Posted By cwyckham
Re: Capsize Ratio's

Fully agree with your plan and the reasons for it. That's also my plan.

Interestingly, the inventor of the Jordan Series Drogue designed it after studying the Fastnet disaster and deciding that...
Forum: Monohull Sailboats 16-06-2012, 12:58
Replies: 266
Views: 82,206
Posted By cwyckham
Re: Capsize Ratio's

Well, I've never been in conditions that bad, but I would think that preparing a boat for a knockdown (including strapping down cookers and batteries) before a trip like that is also good seamanship.
Forum: Monohull Sailboats 15-06-2012, 16:07
Replies: 266
Views: 82,206
Posted By cwyckham
Re: Capsize Ratio's

I guess I have no way of knowing the calibre and offshore, heavy weather experience of the sailors in the Fastnet in 1979. Certainly the weather conditions were very unusual and it's unlikely that...
Forum: Monohull Sailboats 15-06-2012, 11:30
Replies: 266
Views: 82,206
Posted By cwyckham
Re: Capsize Ratio's

My comments about size of boats and skills of sailors were relevant only to the situations I was describing: Heavy weather offshore. I was not referring to massive, survival condition "weather...
Forum: Monohull Sailboats 12-06-2012, 21:30
Replies: 266
Views: 82,206
Posted By cwyckham
Re: Capsize Ratio's

Epic. May have been stupid, but it would make a great sailing movie. Was there a love interest involved?

I'm sure that there are regional differences (SF Bay gets a lot of wind), but I have yet...
Forum: Monohull Sailboats 12-06-2012, 21:08
Replies: 266
Views: 82,206
Posted By cwyckham
Re: Capsize Ratio's

That was a bit of a leap of logic.
Forum: Monohull Sailboats 12-06-2012, 16:23
Replies: 266
Views: 82,206
Posted By cwyckham
Re: Capsize Ratio's

Actually, yeah, I guess that's about right, isn't it. All this stuff about capsize ratios and new versus old designs gets pretty well swamped by a little bit of good seamanship and the actual length...
Forum: Monohull Sailboats 08-06-2012, 20:03
Replies: 266
Views: 82,206
Posted By cwyckham
Re: Capsize Ratio's

There isn't anybody here who would disagree. The boat must always tend itself for a lot longer than a minute or two.

I did hit heavy weather in both boats. Anemometer was broken on both, so I...
Forum: Monohull Sailboats 08-06-2012, 10:12
Replies: 266
Views: 82,206
Posted By cwyckham
I don't understand the premise here. Why are...

I don't understand the premise here. Why are faster boats more work?

I've done two 700 mile-ish offshore passages. One on a westsail 32 and one on an open 60 (but in cruising mode, not racing)....
Showing results 1 to 20 of 20

 
Forum Jump


All times are GMT -7. The time now is 14:46.

Contact Us - Cruisers & Sailing Forums - Sitemap - Community Rules - Terms of Service - Privacy - Accessibility - Top

Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
close

Privacy Guaranteed - your email is never shared with anyone, opt out any time.


ShowCase vBulletin Plugins by Drive Thru Online, Inc.