A great resource for anyone looking to purchase a Thruster or talk about how to best use their thruster!
May 19, 2020
Composite Jet Thruster Thru-hulls
Designed for use in a salt water environment, Jet Thruster thru-hull parts are now available in high strength Composite. Over the years, use of composite material in boat building has increased to a spectacular level. Composite replacements for traditionally machined or cast metal parts is a natural evolution given the proliferation of FRP and other more exotic composite hull materials. A quick look around a boat show will reveal most boat builders have changed from metal thru-hulls to composite equivalents. The reason is obvious: significant durablity, light weight. easy install, and 100% corrosion resistance. In order to comply with ISO-9093 and ABYC regulation, Holland Marine Parts, the manufacturer of the Jet Thruster brand of bow thruster systems, comes forward with a full composite product line of Nozzles, water inlets and a variety of other parts to install Jet Thruster for boats from 25-60 feet. Composite Thru-hull parts offer peace of mind for the boat owner. Salt water has no effects, the parts will last as long as the hull of the boat, and Anti-Fouling can be painted directly over the parts. During the injection moulding process, UV proof Composite material is reinforced with a certain amount of glass filament. The
April 11, 2020
Installation Efficiency- Thrust, Arm, and Moment
The first question most people ask when sizing a bow thruster is “How much thrust do I need?” The question is obvious. Clearly, the bigger the boat the more thrust required to move it. However, unlike primary propulsion, in which the goal is to propel the entire vessel from one point to another, the thruster’s job is to change the orientation, or Attitude, of a vessel around it’s center of effort, or the aggregate of the Center of Wind Force and Center of Gravity, also referred to as the Center of Rotational Effect. Too much of a good thing is not always a good thing, so a better question to ask is “How much thrust is required to change the orientation of my boat?” We have Archimedes to thank for the principle that determines the mass of our vessels, or their displacement, which is famously known as “Archmiedes’ Principal”. A lesser known maritime contribution made by Archimedes was his work on the use of levers and the mathematical description of Torque. Torque can be described as twisting force, and twisting the boat around it’s Center of Rotational Effect, or CRE, is precisely what we want to do with a thruster.
April 11, 2020
Common Thruster Questions Answered
What is Jet Thruster? Jet Thruster uses a centrally located turbine style water pump jet to collect water from below the vessel and direct the water flow to one or more of a series of nozzles installed in the side of the hull to generate thrust for attitude control. What makes Jet Thruster different from conventional thrusters? A Jet Thruster system gives you all of the performance benefits of an expensive retractable thruster system for near the same cost of an ordinary tunnel thruster, without the maintenance headaches, and in an incredibly versatile installation package. How will a Jet Thruster effect the performance of my boat? There are two loss of performance considerations when installing a thruster system: hull form and loss of displacement. This is most critical on the bow, and especially on sailing monohulls. With conventional tunnel thrusters, the large diameter holes in the sides of the hull create drag on any vessel, and the loss of displacement forward decreases ‘pointing’ ability of a sailboat. Retractable thrusters cure the hull form problem, but still create a loss of displacement, and add weight exactly where you do NOT want excess weight. Jet Thruster cures both problems by installing small
April 9, 2020
History and Evolution of Jet Thruster
Jet Thruster started as a small boat thruster concept. Imagined for many years, the idea was to develop a thruster system that did not require big holes to be drilled in the bow, and would allow for installation into the shallowest draft boats. In the early 2000s, the predecssor to the modern Jet Thruster was developed by Willdo Marine, a European Marine Manufaturer. The early model Jet Thruster pumps were adequate for the job of manuevering very light displacment vessels, but the installation foot print, and other manufacturing issues, made these early systems significantly inferior to the modern Jet Thruster system. In 2010, Holland Marine Parts, a Marine Manufacturing and Development company in the Netherlands, pruchased Jet Thruster and halted prouction to begin a multi-year research program that resulted in a ground up redesign of the basic system, as well as an expansion of the product line to support larger vessels. Holland Marine Owner Henry Kroeze says “The idea and principle behind Jet Thruster appealed to me, but first we set to examining and testing the system thoroughly. I was deeply disappointed with the results. So instead of marketing the product we started to systematically improve it. Our engineering department,
April 8, 2020
The New Alternative to Traditional Thrusters
Jet Thruster North America has been established as the North American Distributor for Holland Marine Parts to promote the Jet Thruster line in the US, Canada, and Mexico, and to work to extend the dealer network throughout North America. Founders Andrew Banks and Jim Oates have over 30 years combined experience in the marine industry. Andrew began sales of the Jet Thruster system in 2017, and quickly became the largest Jet Thruster dealer in the US. Jim joined Andrew to bring additional experience in both Marine Electrical and the Sailboat Industry. “From the moment I saw the Jet Thruster System, I knew this system would revolutionize the boating industry. Not only is the system simple to install, it also opens up options to install thrusters on boats that could never have supported a thruster system before,” says Andrew. “The quality of construction, and the care taken for quality assurance, is what most caught my attention,” says Jim. “When I first met Henry Kroeze and the team at Holland Marine, I understood why. The work they have put into developing an industry leading product shows, and I appreciate their attention to detail.” Both Andrew and Jim have many years of personal