Propeller Types and Styles

Investment Cast Propeller Styles and Options

3BladeMP3-Blade MP Style

The 3-blade MP style propeller is a multi-purpose propeller designed for mixing, blending, agitating and liquid movement of all kinds. The propeller incorporates a modified semi-elliptical design, which was developed from years of experience and research, and is considered the standard by which propellers are judged. The MP style is available in "full" blade tip for open liquid applications or a "clipped" tip design for improved efficiency in a duct. The MP style is offered standard in a 3-blade design (both super and square pitch) but also available in a 4-blade design for some sizes.

 

 

2Bladeweedless2-Blade Weedless

The 2-blade weedless propeller is commonly used on aeration and mixing equipment employed in water and wastewater treatment applications. The weedless propeller was designed by Quality Castings to be utilized in applications where solids and other stringy material may be encountered. The non-fouling design eliminates material build-up on the propeller, mitigating equipment failure. The weedless propeller is available in a "full" blade tip design for open liquid applications, or a "clipped" blade design for improved efficiency in a duct.

 

 

3bladeweedless3-Blade Weedless

The 3-blade weedless propeller is commonly used on aeration and mixing equipment employed in water and wastewater treatment applications. The weedless propeller was designed by Quality Castings to be utilized in applications where solids and other stringy material may be encountered. The non-fouling design eliminates material build-up on the propeller, mitigating equipment failure. The weedless propeller is available in a "full" blade tip design for open liquid applications or a "clipped" blade design for improved efficiency in a duct.

Check out our in-stock cast propellers list for an example of the wide selection available from R2 Quality Castings.

 

Thrust Calculation

After analysis of the given typical engine information we have found an average KT value of 0.1375. Thrust can be determined using the following formula:

T = KTρn2D4

Where n equals shaft rotations per second; propeller diameter, D, is measured in feet; thrust, T, is measured in lbs; ρ represents the mass density of water.

Thrust can be found with a margin of error approximately ±25% using the given KT.

Example:

HP = 30

RPM = 750

D = 2.25 feet

ρ = 1.94 lb-sec2/ft4 (fresh water)

 

n = RPM ÷ 60(seconds / minute)

n = 750 ÷ 60 = 12.50

 

T = KTρn2D4

0.1375 ⋅ 1.94 ⋅ 12.502 ⋅ 2.254 ≈ 1068.205 lbs

Contact the cast propeller manufacturers at R2 Quality Castings today with any questions about our industrial and marine propeller casting services.
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