Prop Guard® is made to surround the propeller like a nozzle. This designed action moves water with a controlled directional force which helps promote improved handling and increased thrust. This nozzle action is accomplished with no moving parts to adjust or replace. Whether you have an outboard or stern drive, Prop Guard® will increase propeller efficiency. Technical testing of the Prop Guard® has proven that the performance of pleasure crafts are actually enhanced by the installation of the Prop Guard®
Optimum performance of any vessel is dependent upon the design match between the type of engine, its propulsion system and the type of hull. The delicate balance can easily be upset with an under powered or over powered engine. Even a perfectly well designed propeller may perform miserably if that propeller is placed behind an over-sized or overloaded hull. Any problem with these elements can result in poor performance and handling for a vessel.
However, Prop Guard® , even with a technically unbalanced craft can increase the thrust of the propeller. The loss of kinetic energy due to rotational flow in the water downstream of the propeller can be partially recovered by the guide vanes of the Prop Guard® as it creates a counter rotation vortex, reducing the torque effect of the rotating propeller. The hydrofoil nozzle configuration of the Prop Guard® creates forward thrust, which overcomes its own drag and also provides an effective trim without drag. Nozzle propellers produce more thrust than open propellers as the nozzle produces greater dynamic lift for the boat and permits it to achieve faster acceleration and planing.
Prop Guard® eliminates the need for existing or additional drag producing trim devices. In a steep turn, boats tend to turn on their center of gravity and the propeller loses its bite in the water creating uncontrolled rev-ups, as the stern of a boat and the prop moves tangential to the center of gravity of the boat. This is eliminated as the greater lateral area of the nozzle produces a larger effective rudder area. Prop Guard® increases the thrust significantly to overcome handling problems.
Prop Guard® is the next patent generation of propeller protection from the noted engineer and inventor Wilderich Schultz. Mr. Schultz has spent his life creating products that improved safety and performance for many aircraft and marine products. Mr. Schultz’s father invented the first propeller nozzle guard, the “Kort Nozzle” for canal and river boats in the early 1930’s. Mr. Schultz took this well proven product and used present technology and hydrodynamic principals to adapt it to the needs of today’s boating industry. Now with the joint engineering and design modifications between Mr. Schultz and Mr. Morrell, the new Prop Guard®
The purpose for the Prop Guard® is to provide a product that will protect a family from deadly propeller accidents and give the boat owner the excitement and enjoyment of improved performance. The Prop Guard® provides important benefits for the boat owners throughout the world. Boat safety and performance is a world wide need, not just an American issue. Boating accidents happen worldwide, therefore, the Prop Guard® is a truly global product.
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