Date: Thu, 29 Apr 1993 20:06:26 GMT From: reich@cod.nosc.mil (Ronald S. Reich) Message-Id: <9304292006.AA26253@cod.nosc.mil> Organization: Division of Applied Sciences, Harvard University Subject: team challenge TEAM CHALLENGE by RON REICH This team compulsory was designed by Mike and Sheri McFadden and first presented at the 1988 San Francisco tournament. It was claimed to be impossible by some teams and very hazardous by others. One team even threatened to sue the promoter if any of their team members got hurt while trying to perform it. If not properly analyzed and executed there is indeed a definite hazard of flyers being cut by the flylines of one of the other flyers. Please proceed with caution. I can tell you that my team was the last to fly it at the competition and we scored a 9.7 out of a possible 10. In my approach to the execution there was never any hazard to any of the flyers. Not even close to being a hazard as a matter of fact. I have presented some ideas in my posting of geometry that should be applied to the analysis of this figure. Instructions: All kites shall remain on their respective paths. i.e. kite A will always be on the inside path and kite D will always be on the outside path. All turns are unison left executed simultaneously. The entrance and exit are on superimposed vertical lines. I hope you can decipher any distortions in the asci diagram. ARROW HEAD TEAM COMPULSORY A B C D OUT | | | | IN /\ | | | | \/ UP /\ /\ /\ /\ DOWN / /\ /\ /\ \ / / /\ /\ \ \ / / / /\ \ \ \ A /B /C /D / \ A\ B\ C\ D UNI LEFT O/ O/ O/ O/ \O \O \O \O UNI LEFT \ \ \ \ / / / / \ \ \ \ / / / / \ \ \ OA / / / \ \ \ / / / /\ \ \ OB / / \/ UP \ \ / / DOWN \ OC / \ / OD ____________________________________GROUND LEVEL UNI LEFT NO WIND TOO LIGHT NO LINE TOO TIGHT RON REICH = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = Date: Fri, 18 Jun 1993 11:18:51 -1000 From: reich@cod.nosc.mil (Ronald S. Reich) Message-Id: <9306182118.AA26714@cod.nosc.mil> Organization: Division of Applied Sciences, Harvard University Subject: Team Challenge TEAM CHALLENGE COMPOUND WRAP by Ron Reich I would expect all world class teams to be able to perform this stunt with ease. Also, most master class teams should have little difficulty with it. Experiened and intermediate teams will be amazed at the pattern generated by the flylines when the lines are compoundly twisted. World Class and Master teams should not look at the method of removing the compound twist but rather let their imagination come up with something unique. Here are 2 presentations. One for 4 kites and One for 3 kites. COMPOUND WRAP ( 4 kites ) Enter follow the leader on a 15 foot high ground pass with no lines overlapping. From leader to tail gunner I will refer to the kites as 1, 2, 3, and 4 respectively. FIRST ELEMENT: The first element is a paired wrap once around of 1 and 2 at the same time as 3 and 4. World class teams will probably want to do this as a paired stall fly-around. Master class teams should try it as a paired stall fly-around. Exit the paired wrap in a vertical rectangle that has the proportions of 1 1/2 tall to 1 wide. The upper corners are 1 and 3 with the lower corners being 2 and 4. 2 is below 1 and 4 is below 3. The wrapped lines of 1 and 2 do not overlap the wrapped lines of 3 and 4. SECOND ELEMENT: The second element is a paired wrap once around of 1 and 3 exicuted at the same time as 2 and 4. All kites will initiate the wrap by turning toward the side of the lower number and continue that direction. i.e. if 1 and 2 are on the right side of the rectangle then all flyers will pull right to initiate the wrap. Exit this wrap in a tall rectangle moving horizontally toward the edge of the side with the lower number kites. 3 will be following 1 and 4 will be following 2. Thats it! Take a short moment to look at the flylines and then proceed. SIMPLE UNWRAP: This is just a little bit tricky so read carefully. 1 and 2 initiate an up full loop to unwrap with 3 and 4 respectively. Each of the 4 kites will have a unique pattern. The actual pattern of 1 is a full loop plus an additional 180 degrees to head back toward the center of the wind window. The actual pattern of 2 is a full loop plus 90 degrees more and then climb to assume a comfortable position behind 1 on a horizontal pass. 1 and 2 are forming the top of another tall rectangle. The actual pattern for 3 is to follow 1 through 3/4 of the unwrap and then dive toward the ground to then make an addition 3/4 turn in the same direction which should result in a position directly under 1 and at the appropriate spacing for the tall rectangle. The actual pattern for 4 is to follow 2 through the entire 360 degrees and then as 2 is climbing to get behind 1, 2 will time an additional 180 degree turn so as to form the bottom trailing corner of this tall rectangle in a position behind 3 and below 2. "Boy if you followed all that the first time through then you're a better reader than I am a writer" LASTLY: 1 and 3 exicute a complete up loop for the final paired unwrap. At this point of the stunt it is natural to flow right into a complete full team wrap. COMPOUND WRAP: (3 kites) I'm going to present this one from the perspective of a 3 person team that has the leader standing on the right of the group. THE SET-UP: Enter follow the leader down the left side with moderate spacing between the kites and no lines overlaping. Another pattern would be that portion of a very large horizontal infinity where the kites are coming down on the left side. FIRST ELEMENT: (Path of 1) 1 exicutes a left turn and cuts behind 2 and in front of 3. The susequent pattern of 1 will be to head toward the right edge of the wind window at an angle up of about 30 degrees. SECOND ELEMENT: (Path of 2) 2 will continue turning left and go behind 3. The susequent pattern of 2 will be to head toward to dead center of the wind window. THIRD ELEMENT: (Path of 3) As 2 passes behind 3, 3 will carve to the left and head toward the left edge of the wind window at an angle that will match the elevation of 1. Walla, Compound Wrap for 3 kites. Because its only three kites I leave the unwrap to you ingenuity. There you have it for what you paid. Ron Reich = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = =