Recent Blogs
Simple Gas or Gasoline Engine: How It Works, Parts, Diagram, and Uses Explained
See a horizontal gas engine with heated-tube ignition and a four-stroke animation. Calculate torque, brake horsepower and mean effective pressure.
Scotch Yoke Engine Mechanism: How It Works, Diagram, Parts, Formula and Real-World Uses Explained
Scotch Yoke Engine explained — pure sinusoidal piston motion, no connecting rod, used in compressors, pumps, and Bourke-style aero engines. Specs and tradeoffs.
Ross Yoke Mechanism Explained: How It Works, Diagram, Parts, Formula and Stirling Engine Uses
Ross yoke mechanism explained — how this slotted-yoke linkage replaces the connecting rod in opposed-piston engines, with formulas, tradeoffs, and a worked Stirling example.
Quasiturbine Patent Topology: Declared Cycle Ledger
Quasiturbine engine explained — rhomboidal rotor geometry, four-stroke phases without crankshaft, real applications in UAV, generator, and detonation research builds.
Plumb-Bob Governor: Reciprocating Push-Rod Inertia Mechanism
Plumb-bob governor explained — how this gravity-loaded speed regulator works on early gas engines, with formulas, real examples, and tuning tips.
Watt Pendulum Governor: Ideal Height and Sleeve Geometry
Explore ideal Watt governor geometry. Calculate flyball angle, orbit radius, governor height and sleeve rise from spindle speed and equal link length.
Link or Connecting Rod Mechanism Explained: How It Works, Parts, Diagram, Animation and Uses
Explore an inline slider-crank with fixed link lengths. Calculate piston travel, connecting-rod angle, rod ratio and cycle-average piston speed.
Jump-Spark Coil: Induction Principle and Turns-Ratio Calculator | FIRGELLI
Calculate the secondary-to-primary winding ratio and learn the induction principle. Coil voltage, firing voltage and spark margin are not calculated.
Inlet Valve: Area and Velocity Index Calculator | FIRGELLI
Compare a nominal continuity velocity from entered piston area, speed, flow coefficient and curtain area. The reference ratio does not predict choking or engine power.
Inertia Governor: Point-Mass Acceleration Calculator | FIRGELLI
Calculate interval time, angular acceleration and point-mass torque for an assumed speed change. Governor response, settings and linkage forces are not calculated.
Ignition Plug: Voltage and Entered-Threshold Comparison | FIRGELLI
Compare entered voltage with a supplied threshold and calculate nominal V/g. Spark formation, plug-gap selection and ignition-system diagnosis are not calculated.
Governor and Variable Cam: Sleeve Motion and Flyweight Calculator
Explore a centrifugal governor that shifts a cam sleeve to vary inlet-valve motion. Calculate flyweight force and sleeve travel at an entered arm angle.
Gasoline Vaporizer: Heated Inlet Animation and Heat-Load Calculator
Explore the Capitaine vaporizer’s ribbed inlet, exhaust jacket and separate air valve. Compare sensible and latent fuel-heating loads.
Gasoline Engine: Four-Stroke Motion and Power-Density Calculator | FIRGELLI
Explore four-stroke piston motion and scale two entered power-density assumptions by engine displacement. Calculate the interval, midpoint and span.
Gasoline Carriage Motor Mechanism: How It Works, Diagram, Parts, and Uses Explained
Gasoline carriage motors powered the first horseless carriages — learn how they work, real performance numbers, and named applications from 1886 onward.
Gasoline Atomizers: Swirl Animation and Ideal-Flow Calculator
Follow liquid through a tangential swirl chamber and hollow cone. Compare ideal jet speed, orifice area, full-bore flow and geometric spray radius.
Valve Gear: Ideal Gross Lift from Lobe Lift and Rocker Ratio
Explore a cam, pushrod, rocker and poppet-valve arrangement. Calculate ideal gross lift from lobe lift and a constant rocker ratio; timing and clearances are not...
Four-Cylinder Engine: Firing Interval and Frequency Calculator | FIRGELLI
Calculate evenly spaced engine firing intervals, events per revolution, frequency and time spacing from cylinder count, cycle angle and RPM.
Forked End Connecting Rod Mechanism Explained: How It Works, Parts, Diagram and Uses
Forked end connecting rod explained — how it shares a single crankpin between two cylinders in V-twin and radial engines, with sizing math and real...
Double-grooved Eccentric Valve Gear for a Four-cycle Gas Engine: Mechanism, Parts and Diagram Explained
Explore a crossed-groove eccentric with one traversing follower and alternate-revolution exhaust motion. Animate the tracks and calculate lift-profile timing.
Differential Cam Throw: Selectable Cam Strokes and Roller-Follower Motion
Compare two selectable cam strokes for one roller follower. View transverse selection and circular eccentric contact, then calculate stroke difference and ratio.
Diesel Motor Mechanism: How Compression Ignition Works, Parts, Diagram, Animation and Real Uses
Follow the four strokes of a compression-ignition engine. Calculate end-compression temperature and pressure ratio using an assumed polytropic compression.
Crank-rod Head Adjustment Explained: How It Works, Diagram, Formula & Calculator
Explore a jointed rod-head bearing inside a trunk piston. Compare measured clearance before and after take-up against entered lower and upper limits.
Connecting Rod Head Mechanism Explained: Big-End Parts, Bolt Stretch, Bearing Crush Diagram
Explore a connecting-rod big-end assembly and compare measured bolt stretch with supplied limits. The calculator does not determine preload or material yield.
Connecting Rod End Mechanism: How the Big and Small Ends Work, Parts and Diagram
Explore an inline slider-crank with a split connecting-rod big end. Calculate piston position, travel, rod angle and instantaneous speed through a revolution.