REFLECTOR: Resolved!: Oil temp issue (and heat in the nose)

[Hiroo Umeno]

I have an arrangement that is more like "Spam Cans" where the entire upper cowl is pressurized through the dual NACAs on top with VGs in front of the inlet.  There are metal baffles around the clusters of cylinders with rubber flap up top that seals the interface with the upper cowl.  I checked to make sure that they are properly folded and not making any gaps that leak air.

One thing I can think of is that the take-off for the rear oil cooler is on the Pilot side and that also is the side with the #6 that sits farthest from the inlet.  Perhaps enough air is being diverted into the oil cooler and not getting far enough back.

I have yet to fabricate the Left-Right isolation baffle someone here has suggested so that may help.  I am also thinking that along with the issue I had with the front oil cooler, if the "out" is more of the problem than the "in".  I am contemplating opening some holes on the bottom of the cowl but that seems rather drastic and permanent.  Unless I can get some definitive data that it would help, I didn't want to go there.

Hiroo

From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] On Behalf Of John Dibble
Sent: Tuesday, July 10, 2007 6:21 AM
To: Velocity Aircraft Owners and Builders list
Subject: Re: REFLECTOR: Resolved!: Oil temp issue (and heat in the nose)

Does your plenum fit tight to the rear side of the #6?  If so, a 1/4-1/2" space may help.

John

Hiroo Umeno wrote:

Now, my #6 still runs fairly hot and that kept me from climbing aggressively or doing any high-performance runs.  Next thing to fix.

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