Recent Blogs
Sarrus Linkage Mechanism: How It Works, Parts, Formula, Diagram and Uses Explained
Sarrus Linkage explained — the spatial straight-line mechanism behind deployable solar arrays, scissor lifts, and folding optics. With formula and worked example.
Spatial RSSR Linkage Mechanism: How It Works, Parts, Diagram and Uses Explained
The Spatial RSSR Linkage transfers rotation between non-parallel shafts using two ball joints. See how it works, the formula, and real industrial examples.
Bricard 6R Linkage Mechanism Explained: How the Overconstrained 6R Loop Works, Parts, and Uses
Explore a spatial Bricard 6R loop. Compare two assembly forms, adjust scale and view six hinge axes, joint angles and numerical loop closure.
Bennett's Linkage Mechanism Explained: How It Works, Geometry, Formula, Uses & Animation
Explore Bennett’s spatial four-revolute linkage. Compare alternating lengths and twists, required-angle solutions and ideal closure, with mismatches shown as open chains.
Steam Engine Governor (centrifugal W/ Inclined Planes): How It Works, Parts, Diagram & Formula
How a centrifugal steam engine governor with inclined planes regulates engine speed — physics, formulas, worked example, and real mill applications.
Crossed-arm Steam Engine Governor Mechanism Explained: How It Works, Parts, Diagram and Uses
Explore a crossed-arm governor with upper links and a guided stem. Calculate stem travel, ball radius, ideal equilibrium speed and centrifugal force under an entered...
Water-wheel Governor: Belt Speed and Illustrative Gate Command
Convert wheel speed through an entered belt ratio and slip. Compare it with a target and explore a fixed proportional gate command; dynamic regulation is...
Pickering Governor: Centrifugal Force and Spring-Ball Motion
How the Pickering Governor regulates steam engine speed using spring-loaded weights. Operating principles, formulas, and applications in printing presses and small mills.
Parabolic Governor: Declared Curved-Guide Geometry
Explore mirrored parabolic governor guides. Calculate ball radius, guide height, tangent angle and arc length from reach, rise and a selected position.
Centrifugal Governor: Flyweight Force Calculator | FIRGELLI
Calculate radial flyweight force, angular speed and engine speed from mass, radius, spindle rpm and drive ratio. Explore an illustrative governor linkage.
Watt's Link Rear Suspension: Single-link Geometry Reference
View a Watt-link illustration and compare one tie-link length with vertical travel. Numerical results are single-link angle and setback, not predicted axle motion.
Trailing Arm Suspension: Ideal Wheel-centre Path Calculator
Calculate the side-view circular path of an ideal rigid trailing arm from a horizontal reference. Compare recession, rotation and arc distance, without predicting handling.
Semi-trailing Arm Suspension Mechanism: How It Works, Geometry, Parts & Uses Explained
Semi-trailing arm suspension explained — geometry, camber and toe behaviour, real BMW and Porsche examples, plus a worked sizing example for your build.
Multi-Link Suspension: Five-Link Connection Map and Constraint Rank
Explore a five-link suspension connection map. Calculate remaining wheel-carrier degrees of freedom and redundant constraints from a supplied constraint rank.
MacPherson Strut: Components and Local Wheel-Rate Calculator
Explore MacPherson strut components and calculate the isolated spring contribution to wheel rate, displacement, force and energy using a known local motion ratio.
Hotchkiss Live Axle: Layout and Ideal Shaft Torque
Explore the Hotchkiss live-axle layout, including its open propeller shaft and leaf springs. Calculate ideal shaft torque, axle torque and speed.
Double Wishbone Suspension Mechanism: How It Works, Parts, Geometry & Camber Gain Explained
Explore front-view double-wishbone geometry. Adjust arm reaches, upright spacing and lower-joint bump to calculate camber rate and wheel-centre movement.
De Dion Tube Suspension Mechanism Explained: Parts, Diagram, and Unsprung Mass Calculator
Explore a rigid De Dion tube moving around a chassis-mounted differential. Compare component mass subtotals using a clearly stated halfshaft mass assumption.
Servo Brake Mechanism Explained: How It Works, Parts, Diagram, Formula and Holding Torque Sizing
Servo brake explained — how power-off holding brakes lock servo motor shafts in robotics, CNC, and vertical-axis machinery, with sizing math and real specs.
Prouty-Noble Self-Winding Brake: Cone-Clutch Chain Spool
How the Prouty-Nooje automatic brake works in elevators and hoists — engagement physics, sizing formula, worked example, and failure modes from FIRGELLI engineers.
Novel Car Brake: Hiscox Adjustable Connecting-Bar Mechanism
Explore Hiscox's mechanical car brake with linked shoes and an adjustable bar. Calculate ideal shoe-gap closure and overtravel from entered take-up values.
Street-Railway Tread Brake: Per-Shoe Force Calculator | FIRGELLI
Explore hand-wheel brake rigging and compare four equal shoe forces, tread drag and ideal deceleration under stated rolling assumptions.
Crane Friction Brake: Torque and Coefficient Comparison | FIRGELLI
Explore spring-applied friction braking and compare torque at two assumed coefficients, with fixed clamp force and geometry.
Eddy Current Brake Mechanism Explained: How It Works, Parts, Formula, Diagram and Uses
Explore a rotating disc behind fixed magnets. Calculate torque and mechanical dissipation from an illustrative curve fitted to peak data for the actual brake gap.
Cone Brake Mechanism Explained: How It Works, Parts, Diagram, Formula and Industrial Uses
Explore a cone brake cutaway. Calculate ideal normal contact load and friction torque from axial force, cone half-angle, friction coefficient and mean radius.