Beyond a simple solid core: Boom profiles made from high tensile steel

What has been taken away from the boom in weight has been returned in boom performance. The clever lightweight design makes use of the material where it makes sense. For instance, aluminum to reduce the weight of the outer sections of the Super-S2 boom, but not in the middle of the boom. High tensile steel is necessary in the middle to keep the boom rigid and in line and to prevent spraying errors due to movement.