REFLECTOR: ram air

[Pat Shea]

Steve,

Isn't effective ram pressure for a given speed
affected by the density of the air? Maybe this chart
assumes a sea level on a standard day...

Also, is this chart showing theoretical ram pressure
assuming no induction losses? Obviously that's not
happening w/ plumbing, air filter, etc.    

The only way I see to determine your REAL RAM PRESSURE
is to check it in flight, not a chart. The question
is, what is a reliable reference. It seems that
installation differences in static and alternate
induction air systems makes both of these bad, err,
barometers...

Pat   

Pat 


--- steve korney <s_korney at hotmail.com> wrote:

> 
> Here is a little graph that might help you figure
> your own Ram Pressure...
> 
> Best... Steve
> 
> 
> 
> ----Original Message Follows----
> From: Pat Shea <xl340hp at yahoo.com>
> Reply-To: Velocity Aircraft Owners and Builders list
> <reflector at tvbf.org>
> To: Velocity Aircraft Owners and Builders list
> <reflector at tvbf.org>
> Subject: Re: REFLECTOR: ram air
> Date: Fri, 7 Jul 2006 16:55:51 -0700 (PDT)
> 
> Btw, what is the generally accepted method used to
> determine the amount of ram you're getting?
> 
> I've been comparing the ambient MP reading at the
> airport (as indicated on my MP gauge with the engine
> off) to my MP reading while doing a high speed low
> pass at the same airport minutes later (WOT).
> 
> It sounds like others compare the MP readings
> between
> their ram and alternate air sources.
> 
> I wonder what the typical ram (loss) is on a high
> performance spam can like a Mooney or Bonanza with
> their filtered inductions.


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