This page is aimed at people who have experience of using Classic K’Nex – particularly those who invent things.
Corrections, suggestions and comments will be very welcome, and all will be responded to.
Believe it or not, the non-flexible rods are generally longer than stated. Here is a document which shows the actual and stated lengths, and the relationship between them.
The main use for flexible rods is for forming the rims of wheels. Here is a document which shows how to make elegant wheels.
When pieces are attached to rods, for example when building a gearbox, it is useful to be able to quickly work out what pieces will fit onto the exposed part of a rod. Here is a quick way to do it all.
It is often necessary to use a combination of rods to achieve a certain length. Here‘s how to achieve all the possible lengths up to 1000mm. And here‘s a shortened version which can be printed on each side of an A4 sheet of paper for laminating.
There are three sizes of gears in K’Nex. This document explains how to use them effectively and includes the arithmetic involved.
Damaged pieces can cause problems. Here‘s how to handle them.
Sometimes some extra strength is required when building something using K’Nex. This document shows some useful techniques.