Explain two-plane simultaneous balancing. What is its purpose from a cost/benefit viewpoint?
Generally one-plane balancing (usually the fan) will reduce the vibrations in most engines to acceptable levels. However, placing a weight in the fan of newer high performance engines will frequently upset the vibration levels in the turbine. When this happens, two-plane balancing is required. Two-plane balancing is the process of calculating a set of weights that can be installed in both the fan and turbine areas of the engine (two planes) to reduce vibration levels. It is an extremely complicated mathematical process that without the assistance of the PBS-4100 would require more than 8 hours of engine running and calculation time. Chances of successfully balancing the engines without the PBS-4100 are much less than 50%. Fortunately, with the PBS-4100 Balancing Wizard, the arduous task of calculating a two-plane balancing solution takes only a few seconds, and the complete task can be completed in less than 1 hour.
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