Controllable Pitch Propeller
medium
Controllable pitch propeller systems and hub mechanisms
Known Models (3)
MAN Alpha VBS Propeller
2-45 MW propulsion
· Propulsion Shaft Line
· Controllable Pitch Propeller
type: Controllable Pitch Propeller
Common Failures:
- • Blade carrier bearing wear
- • Hydraulic oil contamination
- • Feedback system drift
- • Blade bolt fatigue
Service: MAN Alpha — for large vessels. Hydraulic oil grade per MAN specification. Annual pitch function test. Full overhaul at intermediate survey.
Spares: MAN Alpha: Dichtungs-Elemente und Verschleißmesswerkzeuge an Bord vorhalten. Lead time: 4-8 Wochen.
Rolls-Royce (Kongsberg) CPP Kamewa
1-35 MW propulsion
· Propulsion Shaft Line
· Controllable Pitch Propeller
type: Controllable Pitch Propeller
Common Failures:
- • Servo oil pump failure
- • Pitch feedback signal error
- • Blade root seal degradation
- • Hub bearing wear
Service: Kamewa CPP — market leader for ferries. Servo oil cleanliness critical. Annual pitch mechanism test. Blade inspection at drydock.
Spares: Rolls-Royce (Kongsberg): Dichtungs-Elemente und Verschleißmesswerkzeuge an Bord vorhalten. Lead time: 4-8 Wochen.
Wärtsilä CPP Propeller
1-40 MW propulsion
· Propulsion Shaft Line
· Controllable Pitch Propeller
type: Controllable Pitch Propeller
Common Failures:
- • Hub mechanism oil leak
- • Pitch control valve stiction
- • Blade seal leakage
- • OD box feedback failure
Service: CPP enables variable pitch without reversing engine. Hub oil change at drydock. Pitch control system test monthly.
Spares: Wärtsilä: Dichtungs-Elemente und Verschleißmesswerkzeuge an Bord vorhalten. Lead time: 4-8 Wochen.