Recent Blogs
Park Injector: Hiscox Double-Tube Control Sequence
Explore the Park injector’s tandem lift and force tubes, separate handle commands and automatic overflow check in an interactive component-state diagram.
Oscillating-Cylinder Steam Engine: Port-Face Motion
Explore an oscillating cylinder and stationary port face. Calculate ideal equal-width slot overlap from entered angle, radius, slot width and port offset.
Oscillating-cylinder Steam Engine: How It Works, Parts, Diagram, Animation and Real Uses
Explore a rocking steam cylinder and direct piston-to-crank connection. Compare indicated power from mean effective pressure, bore, stroke and speed.
National Automatic Injector: Four Fixed Tubes and Successive Checks
Explore the National automatic injector's four fixed tubes and successive check valves. Calculate circular bore areas from example diameters.
Napier Rotary Engine: Eccentric Rotor and Sliding Wings
Explore the Napier rotary engine's eccentric rotor and shell-mounted sliding wings. Calculate limiting gaps and geometric area and volume from entered dimensions.
Multiple-Port Piston Throttle Valve: Declared Port-Exposure Geometry
Explore a multiple-port piston throttle and calculate partial and full axial port exposure from piston travel, port count, pitch and width.
Moyes 1898 Water-Tube Boiler: Patent Layout and Tube-Bank Geometry
Explore the 1898 Moyes water-tube boiler patent and calculate adjacent-row diagonal spacing, surface gap and vertical overlap for a staggered tube bank.
Moran Flexible Steam Joint: Articulation Geometry
Explore Moran's globular flexible joint and calculate endpoint lateral offset, axial setback, arc travel and displacement from arm length and articulation angle.
Enclosed High-Speed Steam Engine: Slider-Crank Kinematics
Explore an enclosed steam-engine slider crank and calculate crank radius, cycle period, mean piston speed and maximum connecting-rod angle.
Misch's Valve Tappet: Historical Component Map and SHM Reference
Explore Misch's historical steam-pump tappet components and a separate simple-harmonic displacement calculator. Reference angles are not valve timing settings.
Meyer Cut-off Valve: Right-and-Left Screw Adjustment
Explore the Meyer riding cut-off plates and calculate their symmetric spacing change from opposite-hand screw lead and adjustment turns.
Metropolitan Injector: Components and Static-Head Comparison
Explore the Metropolitan injector components and compare entered boiler and delivery pressures with the hydrostatic head associated with a suction lift.
Marshall Valve Gear: Suspension-Link Topology and Eccentric Motion
Explore Marshall radial valve gear and its suspension link. Calculate the driving eccentric center displacement, speed and acceleration; valve events are excluded.
Stephenson Link Motion: Expansion Link and Die Block Explained
Explore Stephenson link motion, including two eccentric rods, an expansion link and die block. Compare a separate ideal blend of opposite motions.
Locomotive Boiler Mechanism: How It Works, Parts, Diagram, and Steam Calculator
Explore the gas, water and steam paths in a locomotive fire-tube boiler. Calculate fuel heat input, useful heat and reference equivalent evaporation.
Little Giant Locomotive Injector: Movable Combining Tube Explained
Explore the Rue Little Giant locomotive injector, with a lever-operated movable combining tube, separate lift steam valve and labelled component diagram.
Little Giant Locomotive Injector: Hiscox Figure 383 Explained
Explore the Little Giant injector in Hiscox figure 383, including its separate lift valve, handle-controlled nozzle passages and movable combining tube.
Link Vibratory Engine: Hiscox Figure 354 Explained
Explore the curved cylinders, annular piston rod and rocking shaft of the Link vibratory engine in Hiscox figure 354. Compare illustrative arc travel and angle.
Leader Injector: Historic Double-Tube Sequence
How the historic Leader Injector uses a three-stage hand-lever sequence to control its lifting nozzle, force valve, overflow and double-tube paths.
Körting Injector: Two-Stage Flow and Volume-Ratio Comparison | FIRGELLI
Explore the historical lifting and forcing stages of a Körting injector. Compare entered volume ratios and temperatures without a performance prediction.
Knickerbocker Four-Piston Engine: Animation and Stroke Calculator
See four axial pistons drive a rocking yoke and inclined crank spindle. Explore stroke and swept volume in an illustrative Knickerbocker engine model.
Kipp Rotary-Piston Engine: Historical Layout and Power Calculator | FIRGELLI
Explore Hiscox’s rotating-cylinder Kipp engine arrangement and calculate cycle-average power from entered pressure, volume, speed and efficiency.
Joy’s Hydraulic Shifting Eccentric: Animation and Offset Calculator
See how opposing oil pistons shift an eccentric across its shaft. Compare lateral setting, eccentric throw and average shift speed in an illustrative geometric model.
Joy’s Valve Gear: Connected Animation and Valve-Travel Calculator
Follow Joy’s connecting-rod-driven valve gear through a complete crank cycle. Adjust guide inclination and compare piston position, valve displacement and valve travel.
Inverted Governor: Linkage Illustration and Speed-Bound Calculator | FIRGELLI
Explore an inverted-governor linkage and calculate square-root speed bounds for a declared speed-squared relationship. The outputs do not predict actual governor regulation.