ISO - 484


Difficulties you may be having with your propeller:

Propeller Induced Vibration:
Propeller induced vibration can be caused by inaccuracies in pitch, camber and section shape. Prop Scan allows us to see and remove these inaccuracies. This results in a smoother, more efficient and often faster propeller.

Tip Erosion:
Abrasives present in the surroundings often cause tip erosion. Tip erosion reduces the overall diameter and performance of your propeller.

Propeller Cavitation:
Propeller Cavitation causes vibration, noise and serious damage to your propeller.  Cavitation problems come from two different sources, the first is vessel induced where cavitation is caused by appendages, hull shape and application. The second is propeller induced cavitation, this can easily be identified and rectified by a Prop Scan technician.

Singing Propeller:
Some propellers produce a high pitched noise at certain points between idle and full RPM. At the best of times this can be annoying, if this point lies spot in the middle of your cruising RPM it will be intolerable. Prop Scan technicians have  the solution.

Propeller induced engine overload:
If you are the proud owner of a beautiful yacht but you are a little embarrassed about the black smoke that
's emerging from its transom, then it's time to do something about it. Overloading your engine will vastly reduce the overall life of this engine.

Propeller not loading the engine:
When an engine revs higher than its recommended maximum RPM, it does not develop its maximum horsepower. In other words you are not using your engine's full capabilities. Most of the time this means there is additional speed to be gained.

Fuel Consumption:
Does your boat consume more fuel than the recommended amount? The reason for greater fuel consumption is having a low classed propeller.
On average, an ISO Class I propeller uses between 5-10% less fuel than a Class III propeller!

Propellers not synchronized:
Many twin screw vessels have badly synchronized propellers, in other words the port and starboard engine are not loaded equally at maximum RPM. This is caused by pitch, camber and section shape differences between the two propellers.  

Reversing problems:
Reversing qualities are influenced by the position of your propeller and the section shape on the suction side of your propeller. These problems can be quickly located by the Prop Scan technician.

Poor propeller performance:
There are many different reasons for poor propeller performance. Incorrect propeller selection, poor propeller accuracy etc. etc.. Whatever the problem, there is now a way to find it.

Bring your propellers in and we will
measure them, plus provide you with a 
Prop Scan computer generated report 
free of charge!

Propeller Problems

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