REFLECTOR: Air intake

[Ron N VelocityXLFG]

Not giving up on my naca  ...... Great site.... really like the rotary 
engine.  Still do not get why
they are not more  popular engines . I think Maza is finaly walking away 
from it now .What a  Shame. The engine Seems to make a lot of sense but 
still few makers are willing to join in. Makes me ask why .
I have heard all the union and political reasons .

Ron

On 6/22/2012 10:30 AM, Chris Barber wrote:


> The book "How to Cool Your Wankle" has specific info on this topic including Base K&W diffuser as well as wedge shaped and why NACA's are not the best choice (I diminished the NACA information and gmhad major cooling issue until I went to a wedge).
>
> While written with Dr Wankles rotary in mind the info applies to other liquid cooled engines. It did help me focus knowledge.
>
> It is available from the author, Paul Lamar. He is set in his ways but continually tries to be helpful. His website has a lot of rotary info that may translate well to other liquid cooled engines as well and has a list serve that is very active and moderated if mostly theoretical and a bit political. Www.rotaryeng.net
>
> Chris
>
> Sent from my iPhone 4
>
> On Jun 22, 2012, at 9:48 AM, "Ron N VelocityXLFG" <velocityxl at fastmail.fm> wrote:
>
>> No not heard of them
>> On 6/22/2012 9:14 AM, Al Gietzen wrote:
>>> Ron;
>>>
>>> It depends on a number of factors; including fin density and thickness of
>>> the core. For Velocity speeds; typically a ratio of cooler face area to duct
>>> entrance area of 4-5 is good for core thickness of 2-3 inches. For thicker
>>> core, say 3.5", maybe use 5.5.
>>>
>>> The shape of the diffuser section (duct from entrance to cooler) is
>>> important as well to avoid turbulence in the duct and get best pressure
>>> recovery. Are you familiar with the K & W bell shape diffuser?
>>>
>>> Al
>>>
>>> -----Original Message-----
>>> From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] On
>>> Behalf Of Ron N VelocityXLFG
>>> Sent: Friday, June 22, 2012 6:05 AM
>>> To: Velocity Aircraft Owners and Builders list
>>> Subject: REFLECTOR: Air intake
>>>
>>>
>>> Seems their was some formula for the size of the air opening to the size
>>> of the radiator. Does anyone have this formula. I am going to make a ram
>>> air intake for my oil cooler and do not want to make it to big or to small.
>>>
>>> Ron
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