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September 1, 2026 at 10:26 pm
#327681
I think that the RBM coil arrangement is analogous to the twin coil set-up on these Eisemann model 72 magnetos. There are two individual coils stuck together, mounted on a single armature. If you were to separate the two coils you find the ends of the two secondary windings connected together. The pictured coil is from a Muncey Neptune twin
Joe B