Recent Blogs
Floating Dry-dock: Ballast, Buoyancy and Ship Support | FIRGELLI
Learn how a floating dry-dock lifts a supported vessel. Distinguish displaced-water volume from ballast pump-out volume using a clear buoyancy example.
Triple-expansion Engine and Multipolar Dynamo: Power-band Comparison
Explore serial steam expansion and a coupled dynamo. Compare a selected percentage band around entered shaft power; engine and generator performance are not calculated.
Ship's Steering Gear Mechanism: How Rapson Slide Hydraulic Rudder Actuators Work
How a ship's steering gear works — hydraulic rams, rapson slide geometry, torque sizing, and real examples from cargo ships, ferries and naval vessels.
Marine Boiler: Water-Tube Circulation and Steam Energy Balance
Explore water-tube boiler circulation and estimate steady steam flow from measured fuel input, HHV-based efficiency and steam/feedwater enthalpy rise.
Rolling Thrust Bearing: Basic L10 Rating-life Calculator
Calculate basic rolling-bearing L10 life from catalogue rating, equivalent axial load and constant speed. The calculation does not guarantee service life or select a bearing.
Yarrow Water Tube Boiler Mechanism: How It Works, Diagram, Parts, Calculator and Naval Uses
Explore the Yarrow three-drum boiler layout. Compare steam-output scenarios from fuel rate and an assumed evaporation ratio; pressure is entered, not predicted.
Independent Jet Condenser Pump: Volume Balance Calculator | FIRGELLI
Compare liquid and suction-state gas flow with theoretical piston displacement. Enter condensed mass, water ratio, gas flow, efficiency and stroke rate.