Original Posted By: "Gary McNeel, Jr."
Here is some more information on the magnetos suitable forthe small Contintental engines commonly used on Pietenpols:Bendix-Scintilla SF4 RN - 8 is used on the A65 -8 and C85 -8 engines having no provision for a starter or generator. The de-signation means this:S stands for single type magneto,F " " flange mounting,4 " " number of distributor outlets/ cylinders served,R " " right hand rotation as viewed from the drive end,N " " Scintilla manufacture and-8 " " 8th modification of the basic magneto.The SF4 magnetos do not employ an impulse coupling, accord-ing to the Bendix-Scintilla Service Instructions I have.So, with the -8 Continentals, one uses a right-hand rotation mag-neto and with the -12 Continentals a left-hand rotation magneto isemployed---regardless of the magneto make. It is necessary in any case to refer to the engine application information supplied by the magneto manufacturer, or the engine manufacturer's partsmanual, to determine eligible magneto makes and models foryour engine.The Bendix S4RN -21 is suitable for the -8 Continentals and haseither direct or impulse drives. As I noted previously, they are anewer model than the SF4 and have quite an extensive airworthi-ness directive history. But if you find a pair in good condition and can satisfy the AD thing, they will give you great service.Both Bendix models are shielded types.Graham Hansen (Pietenpol CF- AUN)________________________________________________________________________________Date: Tue, 02 Apr 2002 20:53:54 -0600