Diagrams from yesterday's message/Big Loops

Walter & Group...

My apologies.  The attachments which I included in yesterday's message were of the background texts .... not the diagrams I expected.

I couldn't save Al's original diagram.  Perhaps he'll send it in a different format.

Let's try, here, to provide Bruce Richards' diagrams.  They are right on target.

Gordy

 

````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````

From Jason Borger:-  (Hopefully his attachments will come through OK.)

Gordy,

With the recent "big loop" email and thoughts of SLP, I thought that

perhaps the study group might like to see a few "real deal" shots of

SLP with two different casts (these are also up on my blog at the

moment). The video image is from Grunde Lovoll's 500fps cam in

Norway. The other (dotted/grid) image is me casting on the 200fps mo-

cap system we use at the Fly Casting Institute. These are just to

provide the group with some extra reference, since it can be hard to

really get a solid visual look at SLP from start to finish (super-

high fps really helps!)

JB

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Jason ....

WOW ...... Sure does present a more, "real life" picture !      Thanks.

Gordy

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

From Mack Martin on Bob Rumph's below-horizontal rod plane cast :-

Regarding the response from Bob Rumph, I agree that this type of cast is valuable with a strong tailwind because the casting plane is (or should be)below the boundary layer that is present with any moving liquid or air. On a large body of water that useful layer is no more than about two feet high measured from the surface of the water. The most productive casting boundary layer, with much lower velocity wind, is no more than a foot from the surface of the water. Thus, making a Belgian or oval cast right near the surface of the water (usually with a water haul) will provide significantly lower tailwind to cast into. We teach this cast and discuss the boundary layer during all of our casting classes.

 

Mack Martin

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Mack....   Yes, indeed !  Helps with the Mulson Wind Cast, as well, since that loop is very close to the water surface.

 

Reference:  The Loop, Spring 2001, UNDER THE WIND by Dr.Larry Pratt, Oceanographer, Woods Hole Oceanographic Institue, pp 1-2.

 

Gordy

 

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

 

 

Bottom leg curved to match tip path after RSP

										Top leg curved to match tip path prior to RSP
								Bottom leg curved to match tip path after RSP

										Top leg curved to match tip path prior to RSP
								Bottom leg curved to match tip path after RSP

Attachment: Big Loop.xls
Description: Binary data

Attachment: Big Loop1.xls
Description: Binary data

Attachment: slp_m4.JPG
Description: JPEG image

Attachment: slp_mocap.JPG
Description: JPEG image