HIGH EFFICIENCY PROPELLERS

HIGH EFFICIENCY DOUBLE PITCH ANGLE PROPELLERS

Features

 

Leaned Forward Propellers

1. * 2 Times higher performance with same energy *
* %50 Less Energy with same performance *
2. * Features of The Second Pitch Angle
The fluid forms additional pitch in the distance rate it moves in the centre direction (Δl) on the blade surface and the angle of incidence of the blade surface.
3. * Advantage of Second Pitch Angle
No torque effect on the engine as there is not any force component on the rotation direction. Therefore for the additional pitch obtained from the second pitch angle; the propeller does not attract extra energy from the engine.
4. For detail information, please contact us.

The propeller blades are characterized in that the blade have a geometrical pitch angle (α) together with the rotation direction and a as well as a second pitch angle (Φ) that forms an acute angle or a wide angle with respect to the rotation axis, from its frontal side.

This second pitch angle is referred to as ‘leaned forward’ propellers in case of acute angle, and ‘leaned backwards’ propellers in case of wide angle.

Although the second pitch angle (Φ)  is not a direct pitch angle, it is characterized in that; the fluid forms additional pitch in the distance rate it moves in the centre direction (Δl) on the blade surface and the angle of incidence of the blade surface.

The advantage of the second pitch angle (Φ) is that; it has no torque effect on the engine as there is not any force component on the rotation direction. Therefore for the additional pitch obtained from the second pitch angle; the propeller does not attract extra energy from the engine.

The centre direction movement of the fluid on the blade surface depends on two effects. The first effect is the angle of incidence of the propeller according to the rotation axis of the fluid and the second effect is the difference in pressure between the section of the blade close to the centre and the tip section.

The fluid exits from the trailing edge by covering a distance in the centre direction (Δl) upon arriving to the propeller blade from the leading edge with a certain angle according to the rotation axis.

Meantime the fluid covers a distance from the front to the back in the rotation axis direction.

A section of this distance is created by the geometric pitch angle (α) and the other section (Δd), by the second pitch angle.

The multiplication of the second pitch angle cosine with the distance (Δl) covered by the fluid in the centre direction makes up this distance (Δd) created by the second pitch angle.

As a result of one turn of the propeller, additional pitch is created in the amount of the total of these distances (Δd) created by the second pitch angle. This additional pitch is characterized in that; it has no torque effect and that it does not require extra energy from the engine for this.

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