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High-Tension Magneto System Theory of Operation – Single and Dual High-Tension System Magnetos

Filed Under: Engine Ignition and Electrical Systems

High-tension system magnetos used on aircraft engines are either single or dual type magnetos. The single magneto design incorporates the distributor in the housing with the magneto breaker assembly, rotating magnet, and coil. [Figure 4-17] The dual magneto incorporates two magnetos contained in a single housing. One rotating magnet and a cam are common to two sets of breaker points and coils. Two separate distributor units are mounted in the magneto. [Figure 4-18]

Figure 4-17. Magneto cutaway.
Figure 4-17. Magneto cutaway.
Figure 4-18. A dual magneto with two distributors.
Figure 4-18. A dual magneto with two distributors.

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