Why don’t Goldacres use cable suspension?

Goldacres manufactured a cable suspended boom from 1983 – 1985. These booms were 60ft (18 metres) wide. Their performance was considered satisfactory although the yaw movement generated was somewhat excessive. When the requirement for larger booms eventuated we realised the yaw movement of this suspension system would prohibit further development of this design. At this point the Goldacres developed a controllable yaw dampening system which has now evolved to the current TriTech suspension. The importance of yaw dampening cannot be overstated. A spray boom which is yawing backwards and forwards is over and under applying, defeating the attempts of controlled chemical application. Vertical movement of a spray boom also requires dampening but the consequences on effective spray application are potentially not as great as excessive yaw. A cable suspended boom relies on yaw movement for suspension and when it yaws backward and forward the boom goes up, changing the height of the boom above the target.