NACA is a high speed low drag type opening. Exhaust is not high speed thus
no need for NACA and its complexity and added weight.
----- Original Message -----
From: "Alexander Kaarsberg" <kaarsber@terra.com.br>
Subject: Re: NACA vent placement (was RE: Europa-List: Gel Coat)
<kaarsber@terra.com.br>
>
> The intention with a NACA duct is to get as much air as possible by
creating as little drag as possible, by shaping the intake so, that the air
goes into a divergent duct converting some of the dynamic pressure to static
pressure- in accordance with the priniples of our old friend Bernoille....
> Difficult to believe it will be as efficient in reverse...but it should
give some vacuum and would keep the rain from pouring in......
> Alex #529-on hold awaiting time to build....
>
> De:owner-europa-list-server@matronics.com
>
> Para:europa-list@matronics.com
>
> C=F3pia:
>
>
> Assunto:Re: NACA vent placement (was RE: Europa-List: Gel Coat)
>
>
> >
> >
> > ----- Original Message -----
> > From: "Ken"
> > To:
> > Subject: RE: NACA vent placement (was RE: Europa-List: Gel Coat)
> >
> >
> > |
> > | THEY ARE INSTALLING THE VENTS BACKWARDS AND IT CREATES A VACUMN
> >
> > Well, mebbe, but so does a hole if properly installed.
> > What is the inprovement in airflow of a reversed NACA duct over a simple
> > hole (for the expense)?
> > Ferg
> >
> >
> >
> >
> >
> >
> >
> > Esta mensagem foi verificada pelo E-mail Protegido Terra.
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