Key features

• Pulling propeller for high efficiency and smooth wake
• Optimal power split: 60% forward - 40% aft
• Optimal aft propeller diameter 80% of forward propeller diameter
  • Aft propeller clear of forward propeller tip vortices
  • Larger tip clearance for aft propeller
• Efficiency gain offered by CRP
  • Contra-rotating aft propeller - Swirl recovery
  • Large, slow propellers - Increased ideal efficiency
  • Low RPM - Reduced frictional losses
• Pulling propeller-pod interaction overcomes pod drag