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

Chuck Jensen cjensen at dts9000.com
Tue Jul 10 13:09:24 CDT 2007


Oh.  I guess it kind of depends on who was there first---perhaps its the
Lycs that are "backwards"!    Thanks for the posting on your front
cooler outlet fairing.  Do you think it needs to stick out that far to
create the low pressure area?
 
Chuck Jensen 
 
 -----Original Message-----
From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] On
Behalf Of Hiroo Umeno
Sent: Tuesday, July 10, 2007 1:45 PM
To: Velocity Aircraft Owners and Builders list
Subject: Re: REFLECTOR: Resolved!: Oil temp issue (and heat in the nose)



It is actually on the pilot side.  Franklins are "backwards" compared to
the Lycons.  So, #6 is the far-aft on the pilot side and #1 is the
co-pilot side closest to the firewall.

 

Hiroo

 

From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] On
Behalf Of Chuck Jensen
Sent: Tuesday, July 10, 2007 10:27 AM
To: Velocity Aircraft Owners and Builders list
Subject: Re: REFLECTOR: Resolved!: Oil temp issue (and heat in the nose)

 

Hiroo,

 

Did you mean the oil cooler and #6 cylinder was on "co-pilot", not the
pilot side as you wrote?  If your #6 is on the pilot side, maybe your
engine is installed backwards.  :-)

 

Chuck Jensen 

-----Original Message-----
From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] On
Behalf Of Hiroo Umeno
Sent: Tuesday, July 10, 2007 11:57 AM
To: Velocity Aircraft Owners and Builders list
Subject: Re: REFLECTOR: Resolved!: Oil temp issue (and heat in the nose)

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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