REFLECTOR: Water Cooling

Carruth, Joel L joel.l.carruth at lmco.com
Wed Oct 13 09:27:55 CDT 2004


Al,

 

Do you have pictures of your wing-root radiator installation?  

Did you reduce the size of the fuel tank or reduce the baggage area?

 

Thanks!

 

Joel Carruth

Lockheed Martin 

JSF - Pilot System Software

W: (817) 763-4337

Fax: (817) 777-8378

joel.l.carruth at lmco.com

 

-----Original Message-----
From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] On
Behalf Of Al Gietzen
Sent: Wednesday, October 13, 2004 1:07 AM
To: 'Velocity Aircraft Owners and Builders list'
Subject: RE: REFLECTOR: Water Cooling

 

I'll just add one note of caution regarding the cooling air intake for
the liquid cooled application.  NACA scoops, in general, do not provide
the efficiency and pressure recovery of a ram scoop, and, although
adequate for air cooling where there are relatively widely spaced fins,
may not be adequate for the more dense matrix of a typical efficient
radiator or oil cooler design.  Not saying it won't work, but be aware
that in the original papers on the NACA the authors state that they are
not recommended for heat exchanger application.

 

If you are interested I can send you an XL spreadsheet for designing the
optimum scoop inlet diffuser duct shape according to K&W.

 

Photo of my version of armpit scoop for in-cowl radiator, and custom
cowl for 3-rotor engine is attached.  I also have a second radiator and
an oil cooler in the two wing roots.

 

Al

 

-----Original Message-----
From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] On
Behalf Of Joe
Sent: Monday, October 11, 2004 8:10 PM
To: reflector at www.tvbf.org
Subject: REFLECTOR: Water Cooling

 

I will shortly be working on installing a Renesis (4th generation Mazda
13b) engine in my 173.  I am looking for any suggestions on installing
water and oil cooling on a 173.  Any and all experiences of what to do
and what not to do are appreciated.  

 

For those who have used Naca scoops (air cooled), where does rain water
run off?  In the engine compartment?  If so has anyone had problems
associated with water in the engine compartment, especially in the cold
weather?

 

On a slightly different subject, is the small fresh air scoop adequate
especially in hot summer climates?  I ask because I am trying to decide
what if anything I should do with the already installed Naca in the nose
for oil cooling. Due to the oil cooler size and other considerations I
will not be putting the oil cooling in the nose.  Before I glass it over
I was wondering if I should use it as another source of fresh air in the
hot weather.

 

Thanks in advance for any advise,

Joe

 

 

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