CableRider
The Journal
How Cable Tension and Sag Work Together
Every ropeway cable sags a little under its own weight. This guide explains the parabolic sag model, why more tension pulls a cable straighter, and what that means for the towers.
Monocable, Bicable, and Tricable: The Differences Between Gondola Systems
Not every gondola works the same way. This guide explains monocable, bicable, and tricable (3S) ropeways, and why engineers trade cable count for speed, wind resistance, and cost.
Why Funiculars Barely Need a Motor
Two cars, one rope, one pulley — and a drive motor that barely has to work. This article explains the counterweight physics that makes funiculars one of the most energy-efficient transport designs ever built.
Fixed-Grip vs Detachable: How Cable Car Grips Actually Work
The grip is the small mechanical part that decides whether a whole lift line runs at a slow, steady crawl or a brisk clip with slow-loading stations. Here's how the two main types differ.
A Short History of the Aerial Tramway
From industrial ore-hauling ropeways to the first passenger aerial tramway over a Swiss glacier, this is a brief history of how cable cars in the sky became mainstream transport.
How Many People Can a Gondola Line Actually Move? Understanding Ropeway Throughput
Riders per hour isn't just about how big the cabins are — it's a function of spacing, speed, and load factor working together. This article breaks down the arithmetic planners actually use.
Grade, Angle, and the World's Steepest Funiculars
A 50% grade and a 45-degree angle sound similar but aren't. This article explains how funicular grades are measured and quoted, and what makes some of the world's steepest lines such remarkable engineering.
The Catenary and the Parabola: Two Different Curves, One Sagging Cable
A hanging cable follows a catenary, not a parabola — but a taut ropeway cable can be modeled as one anyway. Here's the real math behind the mix-up, and exactly where the shortcut stops being safe to use.
Sag and Tension: The Trade-off Every Ropeway Cable Makes
Sag and tension move in exact lockstep — but not in the direction most people expect, and not at a constant rate. Here's what pulling a cable tighter really costs, with the numbers worked out in full.
Sizing a Ropeway: From Riders-per-Hour to Headway
Most explanations of ropeway capacity start with a spacing and speed and work forward to riders per hour. This one runs the arithmetic backward: start with a target ridership, and work out what headway three very different cabin sizes would each need.
Jig-Back Aerial Trams vs Continuous-Circulation Ropeways
Two cabins swapping places on a shuttle, or a steady stream of cars circulating around a loop — jig-back and continuous-circulation ropeways solve the same problem in fundamentally different ways, with fundamentally different throughput.
What Happens When a Funicular's Cars Are Badly Out of Balance
A funicular's counterweight physics works beautifully when two cars are roughly matched. Push the imbalance far enough, and the same formula predicts something genuinely different — a system that wants to run away, not one that needs a pull.