LITTLE MOUNTAIN, SC (March 3, 2016) – Pleasurecraft Engine Group (PEG) is sponsoring a team of University of South Carolina (USC) mechanical engineers as they prepare to enter Solar Splash, the World Championship of intercollegiate solar/electric boating, to be held June 15-19 in Dayton, Ohio.
Since 1994, university teams from across the globe have designed and built prototype solar/electric boats for competition in Solar Splash. Each team’s boat goes through technical inspections followed by five on-the-water competitive events. Points are earned in 7 categories to determine an overall champion. USC’s teams have earned eight top 5 finishes including three World Championship titles.
“Our project coincides with a two-semester long class encompassing the entire design process,” stated Carver Buis, USC team member and PEG intern. “We evaluated last year’s USC team design along with their competitors to identify weak areas in need of improvement. The technical knowledge and design advice, in addition to the financial support, we receive from PEG is invaluable in our quest to bring home a fourth World Championship.”
PEG President Mark McKinney added, “Pleasurecraft is always looking to support our community and when we were approached with this opportunity we knew it was a perfect fit. Fostering the next generation of engineers in our industry while supporting the local university has been an incredible experience that we hope to continue for years to come.”
Pleasurecraft Engine Group, owned by Correct Craft, manufactures four engine brands, PCM, Crusader, Challenger, and Levitator, from its headquarters in Little Mountain, South Carolina. For forty years Pleasurecraft has led the industry in providing the highest quality, most innovative inboard engines, backed with exceptional service.
“It's obvious that Nautique is highly dedicated to supporting three- event skiing with the most prestigious events, and the most elite athletes. No other company is as dedicated to Jump and three-event skiing as a whole. I look forward to the future of the sport and a partnership with a company that shares my vision of progression. Nautique is committed to developing the world’s best boats, and I'm committed to being the world’s best Jump athlete so we found it to make perfect sense. To a great season being pulled by the Nautique 200!” – Ryan Dodd
By: Adam Cord & Adam Caldwell
In slalom, the skier maintains a constant connection to the handle. This physical constraint ultimately defines the skier’s path through the slalom course. In other words, the skier can only go where the handle goes. Specific elements within the system dictate how the handle moves, and therefore how the skier moves, through the course. Understanding the relationship between these elements will help build the foundation for more detailed GUT chapters.
Chapter 104 will explain how only three variable elements combine to dictate the handle path. This discussion is broken into two parts. The first part looks at the motion of the handle relative to the boat. The second part looks at the motion of the handle relative to the slalom course.
Part1: Motion of the Handle Relative to the Boat
To get started, let’s investigate the motion of the handle with respect to the boat while ignoring its down-course travel. There are only three variables that define the motion of the handle. They are:
1. Length of the rope
2. Swing height
3. Swing speed
Like a pendulum, the handle swings on a fixed circular path around the pylon. This path is always a semi-circle (assuming no slack) with its curvature defined by the rope length. As the rope gets shorter, the radius of this curvature becomes tighter. Also, since the width of the course is constant, the overall length of the path traced by the handle, called the Arc Length, will increase as the rope gets shorter. This is graphically shown in Figure 1, below.
|Figure 1: Handle Motion at 23m and 10.25m|
Figure 1 also illustrates something about swing-height. The swing-height, or how high the handle must travel on the boat for the skier to reach the buoy line, increases as the rope gets shorter. The point when the handle reaches its maximum height is called the “handle apex.” It should be noted that the handle apex is not the same as the ski apex – more on that in a later section of GUT. The greater the swing-height at the handle apex, the wider the handle will be in the course. Since the total width of the course is a fixed distance of 23 meters, a minimum swing-height for each line length is needed to reach the buoy and run the pass successfully.
Like a pendulum, there is a symbiotic relationship between swing-speed, how fast the rope swings around the pylon, and swing-height. Greater swing-speeds can help the skier carry the handle to a higher point on the boat. Similarly, starting with a high handle apex can improve the skier’s ability to generate speed. The faster and higher the handle reaches its apex, the earlier in the course that apex will be, and the wider in the course the skier can travel during the reach and extension. Figure 2 below highlights the link between swing speed and height.
|Figure 2: Handle Motion Relative to Boat|
Part 2: Motion of the Handle Relative to the Slalom Course
Part one established that for a given line length, the motion of the handle relative to the boat is defined by only swing-speed and swing-height. How, then, does the handle’s motion relate to the slalom course?
Imagine that we are observing the system from Part 1 as it moves down the lake, the same way it does when we are skiing. Watching the handle swing back and forth, we are able to trace its zig-zag pattern on the water. Relative to the slalom course, the handle path traced on the water is based ONLY on the swing-speed and swing-height of the handle!
Slow and Low vs. Fast and High
If we think about the absolute minimum swing-speed required to get from one buoy to the next and successfully run the course, the handle path could theoretically become a straight line from buoy to buoy (the shortest distance between two points). In terms of geometry, this path will cross the CL equidistant between the buoys in the down-course direction. Additionally, the handle will not apex until it arrives at the turn buoy. This kind of handle path creates the sensation that most people describe as being “late, fast, and narrow” to the buoy, when in reality the skier swung “slow and low.” The handle path for a minimum theoretical swing-speed and swing-height is shown below in Figure 3: A.
Conversely, a handle path created by a high swing-speed and swing-height is shown below in Figure 3: B. If the skier is able to generate a great deal of speed into the base of the swing, the handle will cross the CL much earlier. In addition, if the skier is able to sustain a high swing-speed as he swings up on the boat, the handle will reach its maximum height on the boat more quickly, and the handle apex will occur well before the next buoy. This is what most people would describe as being “wide and early”, when in reality the skier swung “fast and high.”
|Figure 3 A: Slow and Low Handle Path Figure||Figure 3 B: Fast and High Handle Path|
For any given line length, the handle’s path is based only on its swing-speed and swing-height on the boat. Because the skier is always connected to the handle, the only way he can improve his path through the course is to change the handle’s path. Increasing the swing-speed of the handle around the pylon, and sustaining that speed into a high and early handle apex, will make the handle path work in our favor and help us to achieve the primary objective of GUT.
Later we will discuss in detail both how to generate a high swing-speed, and how to sustain that speed throughout the arc of the handle path.
If it didn’t happen on Instagram it didn’t happen at all. Seth Stisher announces joining the Connelly Skis team.
We are stoked to announce Seth Stisher has joined the Connelly Team. Seth’s passion for water skiing is witnessed through his decorated competitive history as well as his 20+ years coaching at the WaterSki Training Center (located at OZ in Charleston, SC). In 2016 you’ll see him on the Big Dawg Word Tour lighting up the course on a GT, and coaching some of the best skiers in the world both at his home site in Charleston, SC or at one of his many traveling clinics around the globe.
See why Seth made the switch to the Connelly GT
Seth explains, “My tag line, ‘Wanna Swerve?’ is based around the idea that we welcome anyone who is willing and interested. We want you to ski with us whether you’ve never tried before or you’re an actively competitive skier.” Now that’s a philosophy we can get behind. And yes Seth, we wanna swerve!!!
Check out more on Seth at his website – skiseth.com.
Eagle has a long history as a leading wetsuit manufacturer in the water ski, show ski and barefoot industries. It is best known for it’s high quality, superior fitting barefoot suits with exceptional graphics. In recent years, Eagle has expanded into the competition ski vest market with great success and its Comp Vest is the choice of World Champions and World Records Holders such as Nate Smith, Regina Jaquess, Ryan Dodd and Thomas Degasperi. Eagle is also the choice of the leading show ski teams because of its full range of padded suits, vests and wetsuits all made in the USA, customizable in fit and graphics to the unique needs of each team.
Masterline President Russell Gay stated, “We are very happy about this acquisition and excited about the future. Eagle’s products are category leaders and its product line will be a perfect compliment to Masterline’s current offering of ropes, handles, gloves, travel bags and Quantum Skis. We are a product driven company that likes to have complete control of our manufacturing so that we can ensure quality products that we are proud to use ourselves. We are pleased with the quality of the workers at Eagle and the manufacturing process that is in place.”
The manufacturing will remain in Houston, TX. Chuck Gleason, the previous owner, will remain onboard and assist on new product development, Eagle's technologies and manufacturing processes. Russell added, “We feel that the processes that Chuck and Michele have implemented are very strong. He has state of the art equipment and installed 3D design and modeling software that allows us to create new designs, grade the size patterns and send these direct to a high speed cutting machine or laser to precision cut our material for the best fitting and most consistent suits.” When asked why he sold Eagle Sports, Chuck replied, "I've spent 8 years taking Eagle from a very manual operation to a state of the art digital process utilizing the latest technologies. I've learned a lot along the way. Most importantly that you can't grow as fast by yourself as you can as a team. Masterline's need for a high quality wetsuit line, and their desire to continue manufacturing in the United States, their experience supporting the same markets as we do, make them a perfect match and thus builds a much stronger team."
Eagle also offers a full graphics and printing department with capabilities in screen, pad and dye-sub printing. Eagle’s printing and cut and sew production offers many opportunities to produce additional products for our dealers. Eagle can print t-shirts or promotional items, manufacture and custom print UV shirts, rash guards and event bibs. In recent years, Eagle has been proud to produce the bibs for the leading water ski tournaments in the world including the Masters, US Open and Big Dawg series.
The use of a 4.5 foot ramp is approved for both A & B teams. All 4.5 jumpers will jump first, then events will proceed with the 5 foot ramp.
A jump boat path chart is now apart of the the rulebook that outlines proper language and boat position to communicate to the driver.
Introducing “Zero Based” slalom. Skiers can now shorten the rope after making a full pass without reaching their divisions max speed.
A kneeboard can be used in the trick event for 1/4 trick ski points.
US Team trials will be held for skiers wanting to attend the 2016 FISU University World Championships which will be taking place in Akita, Japan on September 8-11. Team Trails date & location TBA
2017 Nationals will take place at Bennetts Ski School.
The 2016 Nationals wildcard show will take place on social media.
Clarification has been added to the rule book that Nationals is sanctioned as class C and all rules & protest will follow class C rules.
Nationals will be webcast and paid for by NCWSA which will sell sponsorship & commercial spots (NCWSA owns all rights to Nationals video production and coverage).
All-Stars Winners will be recognized at the Nationals Banquet.