Al, no I do not measure “before
and after”; it’s measured at block output near standard oil filter pedestal
and is feed to PSRU input … see attached (this photo shows the
first cooler input, the pressure sender and the return line from second
cooler) … if I understand the oil flow correctly, this is after the
coolers.
My max oil pressure was 80 psi when I
had one cooler and is still max 80 psi with 2 coolers – typical operating
pressure is 75 psi at 5500 rpm.
Jeff
From: Rotary
motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Al Gietzen
Sent: Tuesday, December 15, 2009 2:05 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: Oil cooler
Mark, I have two
of the DB-30416, single-pass coolers … no measureable pressure drop with
2 in series … I’m seeing 80 psi max with the 13B.
JWW
What do you mean “ . … no
measurable pressure drop”? Are you measuring pressure before and
after the 2 coolers?
Al G