Propellers - CPP and FPP - Masson Marine (2024)

FAQs

What is CPP and FPP propeller? ›

CPP propeller blades can rotate around their axis, FPP is fixed and can't rotate. CPP – Controllable Pitch Propeller. This is a type of propeller with blades that rotate around their own longitudinal axis and influence the direction of thrust.

Controllable Pitch Propellers (CPP) In Controllable or Variable Pitch Propellers (CPP), the propeller blades are attached to the boss and their pitch can be altered via a hydraulic system. The blades are removable so if they incur damage, can be repaired without removal of the whole propellor.

The FP propeller guarantees maximum efficiency and minimum noise and vibration levels thanks to tailor-made designs using the latest available technology. The Cunial® material used provides excellent casting, machining, and fatigue properties. An additional advantage is the ease of reparability.

What is a CPP (Certified Payroll Professional)? A Certified Payroll Professional is a designation to an individual through the American Payroll Association (APA). This means that the person is an expert who has been certified in advanced payroll processing, payroll software, and relevant payroll legislation.

Benefit from a versatile and high-efficiency propeller range: Our standard blade/hub materials are Ni-Al-bronze, with stainless steel offered as an option.

A FP propeller is lighter, less complex, easier to maintain, and costs less than a Constant Speed (CS) propeller. The downside to a FP propeller is you can't adjust it in flight. Further compounding this issue is the decision of using a cruise or climb propeller.

A controllable-pitch propeller is one where the pitch is controlled manually by the pilot. Alternatively, a constant-speed propeller is one where the pilot sets the desired engine speed (RPM), and the blade pitch is controlled automatically without the pilot's intervention so that the rotational speed remains constant.

In general, 2-blade propellers are slightly more efficient. However, efficiency doesn't propel an airplane, thrust does. Thrust is needed to overcome drag and weight, helping the aircraft climb.

Three blades props provide the best combination of performance, speed, and efficiency. Some manufacturers also create four and five blade propellers to increase acceleration and reduce ventilation. A four blade propeller will improve handling and control for high-performance applications.

Controllable pitch propellers have a very high initial cost. And this cost increases rapidly with increasing diameter of the propeller.

What is the difference between CPP and FPP? ›

Controllable Pitch Propeller or CPP

Unlike the fixed pitch propeller, the blades of these propellers can be altered, set whatever pitch is required, across the whole power band from full ahead to full astern.

A controllable-pitch propeller is made up of a boss with separate blades mounted into it. An internal mechanism enables the blades to be moved simultaneously through an arc to change the pitch angle and therefore the pitch.

In general, 3 blade props are the most common. They are available in wide size ranges and cost less than 4 blades. They typically yield a slightly higher top end speed than 4 blades.

The price is significantly higher than for the FPP, but the CPP offers a number of advantages: - Significantly improved overall efficiency at varying load and/or varying speed conditions - Better manoeuvrability (acceleration, breaking, crash stop) - Allows reversing without reversing gear/reversing engine.

A controllable-pitch propeller is one where the pitch is controlled manually by the pilot. Alternatively, a constant-speed propeller is one where the pilot sets the desired engine speed (RPM), and the blade pitch is controlled automatically without the pilot's intervention so that the rotational speed remains constant.