I was watching a light plane playing today and thought how it corresponded to a bird. And there are many vehicles that correspond to land-based animals. But I...
Dave Howorth
Dave.Howorth@...
Jul 21, 2006 8:08 pm
196
... I'm not sure if a Portugese man of war or Velella pass as an animal, but they do utilize the wind, or rather benefit of it without really knowing....
Portuguese Man-O-War ... From: Dave Howorth Are there any creatures that correspond to a sailboat, that get their power from the interplay of two media? Or is...
A species of Jellyfish (Vellela Vellala) uses a sail like spine and it sails, (or is blown) across oceans - sometimes apparently in great numbers - these...
... From: Dave Howorth Are there any creatures that correspond to a sailboat, that get their power from the interplay of two media? Or is sailing a uniquely...
I have always thought that aeroplane designers spend too much time worrying about staying up and not enough about extracting getting thrust from the air. It...
This is a really interesting question and is one of my favorites. I think the answer really depends on your definition of "sailing." If floating on the surface...
Hi Dave, Thanks to you and to everybody else who answered. ... My googling skills are not with me this morning. I can't find anything terribly useful about...
Dave Howorth
Dave.Howorth@...
Jul 23, 2006 11:44 am
203
... From: Dave Culp To: ayrs@yahoogroups.com Sent: Saturday, July 22, 2006 9:14 PM Subject: Re: [ayrs] is sailing natural? ... apparently ... The albatross...
He *is* using differential fluid flows at varying altitude (so, Dave, he is not just gliding--and doesn't rely on vertical movement of air), but he *does* use...
Hi all (from a new member) From my observation of albtrosses I consider them to derive horizontal thrust as well as lift - at alternating parts of their...
michael graaf
m_graaf@...
Jul 24, 2006 9:15 am
206
I suppose we ought to be getting input from the high performance glider pilots - any high performance glider pilots out there? Robert Downhill ... ...
... power ... pastime? ... is a creature that uses the wind and the wind's interaction with the waves (raised by the wind) to achieve continuous soaring...
Interesting philosophical discussion. But why are you looking at animals? A sailing boat isn't a living creature - maybe inspiration came from things such as...
I once 'bent' a Slingsby T31 tandem Tutor, with a glide angle of about 20:1, so I guess that wasn't high performance. However in my working life I was...
One of the things I think you've missed is that an albatross (or at least a petrel which is the limit of my personal observation) needs rising air to soar...
From Answers.com: http://www.answers.com/topic/avian-flight Soaring over the sea ... This indicates thermal soaring (up-traveling wind) but also mixed-airspeed...
Here we are. This is a .pdf download, a fairly large one (nearly 3 mb): http://www.esoaring.com/albatros_presentation_esa.pdf I'm still reading this so may be...
... Well, if you define sailing as controlled movement due to exploitation of the relative velocity between two media, then solar sailing is definitely out; as...
... Hmmmmm ... interesting, but not, to me, at this moment, entirely convincing. His fundamental premise is that a change in airspeed, /without any change in...
... From: S Fishwick To: ayrs@yahoogroups.com Sent: Tuesday, July 25, 2006 1:05 PM Subject: Dynamic Sailing WAS RE: [ayrs] albatrosses ... Maybe the author...
Hmm, seems I was ignorant .. ... Haven't had a chance to read this yet, though I did see some other articles (below). ... Clearly, it's not. You can't...
Dave Howorth
Dave.Howorth@...
Jul 25, 2006 10:36 pm
218
0.5mv^2 is not violated. It IS based on a fixed frame of reference. Imagine an hot air balloon that is fixed to its neighboring air molecules. An horizontal...
Sure, all the laws of physics apply, but you don't need Newton to understand how the bird does it. Imagine an albatross trying to maintain level flight with...
... You've missed my point, Dave . Soaring is what albatrosses do, and they do it only in the air, in the wind boundary layer. Sailing is what boats do, and...
Hi All, I'm back home again from my annual merchant ship job, almost 5 months with one day off every 5 weeks. I did fetch my email [incl. AYRS] only every 5...
Could I suggest that another way to word the question is the reverse; how many human vehicles and activities imitate other life forms? Gliders riding thermals...
Well put Dave, I've always admired your command of the language. Pterosaurs is a little off the subject I'd like to pursue, but I think their apparent ability...
