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Changing Angles

Skate blog on math and politics.

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Tag: Axle Axis

Data10 Comments

Stooge 3-link truck: skating in never-never land

October 7, 2022October 14, 2022 Ⓐ

A fantasy steam-punk machine that looks kinda cool, if that’s your thing, until you realize it can’t possibly exist, because it violates the laws of nature and logic. Continue reading Stooge 3-link truck: skating in never-never land

Data2 Comments

Major Arc: a couple of problems

February 3, 2021July 16, 2021 Ⓐ

Major Arc is marketing a design that isn’t, and never could be, geometrically consistent. In this article, I explain what makes the design unworkable. The real question is whether they already knew about this. Continue reading Major Arc: a couple of problems

MathLeave a comment
The actual graph of the lean to turn function (given also in the academic literature, but easily derived from basic euclidean axioms) for various pivot axis angles. The x-axis is the tilt of the deck (lean) and the y-axis is the rotation of the axle on the ground from rest.

Axle offset (aka rake): it doesn’t change axle turn

July 15, 2019October 28, 2021 Ⓐ

Here’s a couple of illustrations and a chart just to restate the obvious: tilt/turn is rake-agnostic. Continue reading Axle offset (aka rake): it doesn’t change axle turn

MathLeave a comment

Truck width: wheel travel

July 7, 2019July 5, 2021 Ⓐ

In this, I explain why the wheels travel the same distance, regardless of truck width. The main point is that the circumference of a circle is directly proportional to its radius. So, a circle with a radius x-times as long as another circle will also have x-times the circumference. So, the wheels trace curves of equal length on different truck widths. Continue reading Truck width: wheel travel

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