Joe,
Apart from plug fouling as already mentioned, the main bearing oil scavenging
would be a trick to fix. Looking at the motor end-on from the trany end,
there is an oil gallery inside the casting from the main bearing that runs
down and to the right. (see pic RED line). Plugs-up it runs down
and to the left. Plugs down it would have to run up-hill. Plan B
would be to drill and tap an external line from that area of the casing to the
sump. I can’t remember if the front main bearing just drains into the
oil pump cover or if there is a gallery there was well.
You would have to seal up the oil filler hole and the dip-stick hole and any
other spot oil wants to dribble out.
Neil
Kruiswyk
Another
rotary project in the works…
From: Rotary motors in
aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Joe
Berki
Sent: Saturday, January 13, 2007 4:36 PM
To: Rotary
motors in aircraft
Subject: [FlyRotary] Plugs
down
don't
remmember if this was discussed but can the 13B be mounted and run plugs
down? I know several others have running installations with plugs
up. Thanks for any help.