Recent Blogs
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.
Gas-Motor Passenger Car: Ideal Drivetrain Calculator | FIRGELLI
Follow an illustrative gear-and-chain drive and compare engine torque, axle torque, rim pull and ideal wheel speed from horsepower, rpm and geometry.
Street Railway Sweeping Car: Paired-brush Motion Calculator
Explore paired diagonal rail brushes. Calculate nominal tip speed, lateral and along-track components, and rotation frequency from entered diameter, RPM and angle.
Cable Grip for Street Railways: How the Mechanism Works, Parts, Diagram and Uses Explained
Explore a historical street-railway grip with a guided lower jaw and bell cranks. Compare supplied force ratios, cable-speed conversion and opening clearances.