Fan blade protection system
Fluid flow energy converter
Gas turbine engine power turbine
Helicopter primary flight controls
Hoop fan jet engine
Hydraulic energy converter
Integrated reduction gear and counterrotation propeller
Marine propelling apparatus
Method and apparatus for serial coolant flow control
Mixing, conveying heating and/or cooling apparatus
Multivane windmill
Noise reduction in aircraft propellers
Oppositely skewed counter-rotating fans
Pitch change mechanism for prop fans
Propeller combination for a boat propeller unit
Propeller combination for a boat propeller unit
Propeller module for an aero gas turbine engine
Propeller module for an aero gas turbine engine
Propeller module for an aero gas turbine engine
Propeller pitch change mechanism