Recent Blogs
Tandem Compound Vertical Engine: Indicated-power Calculator
Compare ideal HP and LP indicated-power contributions from entered mean effective pressures, bores and equivalent piston travel. Shaft power is not predicted.
Steeple Engine Mechanism Explained: How Twin-Rod Marine Steam Engines Work
Steeple engine explained — vertical inverted steam engine design, dual-rod kinematics, marine and mill applications, sizing formulas, and a worked example.
Silver's Marine Governor Mechanism Explained: Parts, Diagram, and How It Controls Marine Steam Engines
Silver's Marine Governor controls steam engine speed against varying propeller load at sea. Learn how this 1860s flyball governor works, with formulas and a worked...
Twin-screw Vertical Engines: Ideal Indicated-power Calculator
Explore two schematic vertical cylinder units and calculate ideal indicated power from mean effective pressure, bore, stroke and speed. Shaft and propeller output are not...
Trunk Engine: Piston Areas and Ideal Indicated Power
Explore a hollow-trunk marine engine and compare its two working piston areas. Calculate ideal indicated power from entered mean effective pressure and mean piston speed.
Brotherhood Three-cylinder Engine: Radial Arrangement
Explore Hiscox’s Brotherhood-type radial steam-engine arrangement and compare displayed angular sectors. The calculator does not predict valve events or power.
Gridiron Slide Valve: Port Opening Calculator | FIRGELLI
Compare gridiron and single-port opening displacement. Calculate travel saved for equal-length ports, with a schematic animation and worked area example.
Diagonal Twin-screw Engine Mechanism: How It Works, Parts, Diagram and Marine Uses Explained
Watch crossed connecting rods drive two inclined-cylinder slider-crank trains. Calculate cylinder-axis projections and compare the space tradeoff as inclination changes.
Compound Engines Explained: How Staged Steam Expansion Works, Parts, Diagram & Uses
Explore two tandem compound steam engines driving separate shafts. Compare cylinder areas, swept volumes and absolute boiler, receiver and exhaust pressure ratios.