New week! Let’s make it a good one and start by shedding some light on what makes torsion springs so great. In technical terms we’re talking about the torque performance, in this case . Torque is equal to force x leg length: M= F x A. Torsion springs have a linear spring characteristic, i.e. if a spring is turned 10° to provide torque of 1 Nmm, the same spring will provide a torque of 2 Nmm at 20° torsion. Interesting!