WESTERN ALLIED ROBOTICS

Belt Length Calculator

SDP-SI's Center Distance Calculator for determining the correct spacing between to pulleys.

Team Tentacle's Torque/Ah Calculator

This is a very helpful calculator to determine max current draw, torque, and max speed for different drive train setups.

MatWeb's Weight Caculator

For calculating the weight of a given shape when made out of common materials (aluminum, steel, polycarbonate, etc).

RioBotz Tutorial

A downloadable free book with a lot useful information about building a fighting robot.