I guess you got the answer for the top 2;
both oil return paths, top to lube the engine the bottom to the pressure valve
(controls oil pressure) and bypass to the pan.
Below the oil returns is the oil
pressure sender. Below that the coolant outlet to the heater core.
Al G
-----Original Message-----
From: Rotary motors in aircraft
[mailto:flyrotary@lancaironline.net] On
Behalf Of kevin lane
Sent: Monday, August 25, 2008 2:51
PM
To: Rotary motors in aircraft
Subject: [FlyRotary] more holes
damn, Bruce didn't include
the owners manual with the engine! what are these holes for?
kevin