Joseph Berki wrote:

Hi,
        I will be using a submerged inlet for charge air and cooling for
the 13B in an EZ pusher.  Has anyone computed the size of the scoop or
inlet based on air consumption of the system? For example how much
charge air is needed by the 13b 400cfm, 500cfm?  How much air is needed
for cooling? Rad volume of 500cubic inches to 700 cubic inches?  Frontal
area of the radiator?  It seems that builders start with the scoop
suggested by the designer, however, how many designers suggest using a
13B?  Thanks for any help.

Joe Berki
Limo EZ

Use these numbers in this Turbonetics chart to calculate the charge
air required. The 13B is equivalent to a 2600 cc four stroke engine
with 120% volumetric efficiency.

"submerged inlet"
Not a good idea Joe. NACA themselves say it is not good for heat exchangers.
Best to use an external P51 type scoop with boundary layer air bleed.
Here is what NACA had to say about it.

Here is my latest thinking on the EZ cooling problem.

Paul Lamar
 
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