09/18/2025
Recent repairs being made to a Moller “bar/membrane” chest where each note for each rank is on a removable box or “bar” with each note bladder being affected by high pressure on one side and chest pressure on the other. When the primary is exhausted on the high pressure side the low pressure bladder or pouch collapses allowing wind into the pipe. This style of chest was short-lived due to difficult maintenance considering that all of the pipes on the chest must be removed to access a single bar.