The lowest hole, 1/4 NPT, was put in as a gravity return for a Real World Solutions RD-1B Gear Reduction Drive.  
Joe

---- Original message ----
>Date: Mon, 25 Aug 2008 15:50:58 -0700
>From: "kevin lane" <n3773@comcast.net>  
>Subject: [FlyRotary] more holes  
>To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
>
>   damn, Bruce didn't include the owners manual with
>   the engine!  what are these holes for?   kevin
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>oilfilter.jpg (161k bytes)
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