Boat Prop Bingo - Understanding Boat Propeller Terminology

If you have studied begun a new boat prop, can you performed in a number of obscure conditions. "So you have a 15" pitch, it is a hollow blade? What is the Commission? "It can be a little intimidating, but it is not as complex as it sounds, when you decrypt the jargon associated with boat props.

Boat Prop parts:

First of all, the typical prop is arranged by 3 or 4 blades around the hub. The hub is used to connect the prop blades to the drive shaft of theEngine. The rotor blades themselves are angled to screw pulled through the water, the boat forward. The front edge is the side of each sheet, cutting through the water. The trailing edge is the opposite side.

You may see the "spline" discussion. These are not technically part of the boat's proposal, only the teeth on the drive shaft. The propeller designed to fit a shaft with a certain number of splines.

Boat Prop Features:

Each boat is propbe defined by its diameter and height. This is often marketed as two numbers expressed in inch measurements, such as 14.5 "X 12" and is usually marked somewhere on the hub. T he first number is always the diameter, which is twice the distance from the center of the hub of the blade to the end. The second number is the prop pitch. Pitch is the theoretical distance the prop will travel through the water in a single revolution. Our 12 "pitch prop would be 1 foot forward for every tripRevolution. I mentioned that pitch is the theoretical distance the prop would be, because in the real world props prop slip travel experience. Slip is the difference between the amount of money and the real distance. Slip can not exceed 10% for effective planning boats up to 80% for heavy work boats.

The rotation is marketed as either right or left hand expression. Most boat props are right hand rotation, but a left handed prop, an engine will be usedas twin engines are used to counteract the torque of the engine, pull on the steering to one side tends to fall.

Cupped blades are a special treatment where the trailing edge of the prop blade is bent. This may provide better performance under certain circumstances.

Rake is another term you may hear. Rake is the angle of the blades from the hub. A rake of 0 means the leaves are 90 degrees perpendicular to the propeller hub. Means a rake of 20 degrees,that the leaves have begun shaking off the hub 20 degrees from the vertical. Negative rake of points the blades on the way to the front of the boat and is sometimes used to add strength to high-performance props.

Now that you've got the basic lingo down, it becomes much easier to discuss your needs with propeller marine supply expert. Before you begin, it's always a good idea to make notes about the engine's do, HP model, and year. Y ou should also look at your currentBoat's proposal and to identify the material) (typically aluminum or stainless steel, number of leaves, diameter and pitch. With this information in hand, you should be prepared to find the support that is right for your boat and boating style.