REFLECTOR: Water Cooling

Fred Vandeman fvandeman at comcast.net
Wed Oct 13 10:35:29 CDT 2004


Al,
I'd love to have the spreadsheet and anything additional you could 
provide re: oil cooling, radiator and placement for 3-rotor.

Fred


On Wednesday, October 13, 2004, at 01:07  AM, Al Gietzen wrote:

> 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 OfJoe
> 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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