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Engineering

Securing our record took a team of over five hundred people. The floating boom designs used in 2008 and 2009 allowed the team to demonstrate its capacity, capability and team spirit. These booms showed sponsors we have what it takes to work together and get the job done. After the 2009 boom failed, the Grining Family (owners of Eagle) told us to do whatever was required to Eagle to make this record ours. The most challenging constraint of our boom design was instantly removed. No longer did our 60 metre span boom have to be a lightweight floating system. It could now be a structural part of the boat!

It is a big responsibility to modify a $5,200,000 boat and we had only one opportunity to build a boat mounted boom to do the job. Boom failure had to be prevented at any cost.

So we set out to assemble the necessary expertise.

Richardson Devine Marine built Eagle. Ron, Toby and Roger from RDM worked with us to create the initial conceptual design. They were fast, efficient and fantastic to work with - and they make awesome boats.

Incat Crowther, designers of Eagle, took on the task of detailed design and engineering of the boom. Just like maths at school, the best answer is the simplest answer. We could tell you what that means but it would be no fun if we gave other teams the whole answer!


Using this awesome crane from Pfeiffer Cranes, the boom is fitted in less than an hour. When we are finished with the boom is removed and the whole work site is clean and clear in less than three hours - yes that three hours includes the whole process from taking the boom off to a totally clear and clean work site.


An important design consideration was to ensure that Eagle maintained its normal sailing schedule and that booms were fitted, skiers pulled and booms removed without any interruption to the schedule. Yes, we actually achieved this!

The boom was a collaboration between a team of experts who each contributed in their area. The biggest pleasure of working with Incat Crowther and the reason for the optimized design was their willingness to discuss ideas and seek input from others for this ground breaking task. As the client, our questions and input was welcomed and incorporated - you can't ask for a better working relationship or outcome than this collaboration with Incat Crowther produced.


Almasts contributed key design details. Aluman Engineering constructed the boom to amazingly precise standards and contributed excellent practical design advice. Strong Rope was a fantastic and knowledgable company to work with and were exactly who we needed for our task.

Having pulled 116 skiers from the deep (114 over the full distance) and survived the full force of Eagle for four runs, our boom design is now proven.

Thank you to the boom team, your work has been truly amazing and we unreservedly recommend you because of your "can do" and collaborative methods and your proven results on this challenging project. Thanks also to the Grining family for letting us mount this boom on your boat - only in Tasmania would we be thrown the keys to a $5,200,000 boat for a weekend so we could work between sailings to cut and shut it for fitment of a waterski boom.

A big thanks to David Baillie for our 2008 and 2009 boom designs - they came amazingly close to doing the job for us. The boom designs were excellent and it was our inability to control other external variables in this totally new and groundbreaking approach which created difficulties.

2012 engineering

Eagle’s props will be changed for the 2012 Record Run. If you are interested in the details, read on!

On our World Record 114 Skier Run, Eagle’s diesel engines weren’t revving fast enough to “hit the turbos”. We only had access to part of the 3100 horsepower available from these amazing twin turbo diesel engines

The solution is exactly the same as in a turbo diesel car. Change back a gear so the engine is “on boost”

Over the Christmas break, Eagle’s custom waterski props were built! These props have 15% more blade area (extra traction) and 25% lower pitch (giving more revs) compared to the props we used in 2010.

Previously we were pulling 950rpm at the critical speed where skiers started to lift up. We anticipate 1180rpm at the same speed in 2012 therefore giving us 43% more grunt.

24% more skiers with 43% more grunt!!!

Proper skier technique is still absolutely essential. The team has proven that the proper technique gives us the quickest possible start and the most skiers over the finish line. Proper technique means you won’t take out skiers next to you and also gives you the best possible chance to finish. Keep an eye out for a separate details on skier technique.