Recent Blogs
Tandem Compound Vertical Engine
Tandem compound vertical engine explained — how stacked HP and LP cylinders on one piston rod doubled marine and pumping efficiency. Diagrams, formulas, examples.
Steeple Engine
Steeple engine explained — vertical inverted steam engine design, dual-rod kinematics, marine and mill applications, sizing formulas, and a worked example.
Rotary Multicylinder Engine
Rotary Multicylinder Engine explained — how multiple cylinders share a common crank to deliver smooth torque for marine, locomotive, and industrial steam drives.
Silver's Marine Governor
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...
Vertical Engine with Bell-crank Lever
How a vertical steam engine with bell-crank lever converts piston motion to crankshaft rotation. Geometry, sizing formula, and a worked marine example.
Twin-screw Vertical Cylinder Engine
Twin-screw vertical cylinder steam engines drive paired propeller shafts from one stroke. Learn how they work, sizing math, and named marine examples.
Trunk Engine
Trunk engines packed marine steam power into shallow hulls by routing the connecting rod through a hollow piston trunk. Here's how they worked and where...
Three-cylinder Engine
How a three-cylinder steam engine works, why marine and locomotive engineers chose it, plus a worked indicated-power calculation across three operating points.
Oscillating Marine Engine Valve Motion
Oscillating marine engine valve motion uses cylinder rocking to time steam admission and exhaust. See how paddle steamers and launches used it, with a worked...
Link Vibratory Engine
How a Link Vibratory Engine works — the swinging-cylinder steam motor that powered marine launches and stationary plant. Geometry, IHP, worked example.
Joy's Hydraulic Shifting Eccentric
Joy's hydraulic shifting eccentric explained — how marine triple-expansion engines reverse without a separate eccentric, with worked example and design tradeoffs.
Inclined Paddle-wheel Engine
Inclined paddle-wheel steam engine explained — geometry, formulas, and a worked example for heritage paddle steamer restoration on Mississippi sternwheelers.
Gridiron Slide Valve
Learn how a Gridiron Slide Valve works in steam engines, why it cuts port travel by 75%, and where it powers locomotives, marine engines, and...
Fletcher's Rotary Condensing Engine
Fletcher's Rotary Condensing Engine explained — how the rotary valve, jet condenser, and crank work together to drive marine and mill applications efficiently.
Diagonal Twin-screw Engine
Diagonal twin-screw engine explained — how the inclined cylinders drive twin propeller shafts, design formulas, and real marine examples used in steam yachts.
Compound Engines
Compound steam engines expand steam through 2 or more cylinders in series for higher efficiency. See how they work, formulas, and real marine and mill...
Bremme Valve Gear
Bremme valve gear explained — how this radial gear sets cutoff and reverse on marine and stationary steam engines, with worked example and design tradeoffs.