Jeff,

Unless you're direct drive, it doesn't matter.  The PSRU gear ratio
will put the prop all over the place.  Somewhere I read that 2.17:1 will
take 50 revolutions before the prop ends up in the same place.  One could do
the math if one really had to know.

NeilK


-----Original Message-----
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On
Behalf Of Jeff Whaley
Sent: August-21-10 8:35 AM
To: Rotary motors in aircraft
Subject: [FlyRotary] Prop orientation with TDC

What is the Rotaries best prop orientation at the prop flange relative to
TDC?
The Lycomings are typically entering the compression stroke at 11-10 o'clock
and 5-4 o'clock.
The 13B goes through 3 compression strokes per e-shaft revolution - does
this predicate a 3-bladed prop is the ideal match?
Jeff

This message, and the documents attached hereto, is intended only for the
addressee and may contain privileged or confidential information. Any
unauthorized disclosure is strictly prohibited. If you have received this
message in error, please notify us immediately so that we may correct our
internal records. Please then delete the original message. Thank you.

--
Homepage:  http://www.flyrotary.com/
Archive and UnSub:
http://mail.lancaironline.net:81/lists/flyrotary/List.html