aircraft spark plug holder with plug rotation markings
holds eight spark plugs from a four-cylinder engine with markings to rotate the plugs
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updated November 15, 2024
Description
PDFOn typical horizontally-opposed aircraft engines, following this rotation pattern will swap plugs from top to bottom, short lead to long lead, and reverse the spark plug polarity.
https://www.aviationpros.com/home/article/10387932/why-rotate-spark-plugs
Add a filament change in the slicer to swap colors to make the markings more readable.
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Model origin
The author marked this model as their own original creation.
