Just recently a UK builder, in the January? Europa Flyer, I believe,
mentioned that air won't flow out the D hatch. Tends to flow back in and
hit the back of your neck. The reason for this, I believe, is that from
roughly the back of the doors back the fuselage is necking down, and
therefore is a relatively high pressure region. Following this logic, the
best place for an exit vent is at the peak low pressure zone, which would be
roughly at or slightly behind the maximum width/height of the fuselage. Of
course, the wing root will have substantial effect on the placement of
side-mounted exit vents, so perhaps the roof mount is the best. What we
need is a simulated pressure field plot for the plane.
Shaun
----- Original Message -----
From: <erichdtrombley@juno.com>
Subject: Re: Cabin ventilation
> David, what you suggest is precisely what other builders have done. I
> know of several builders who have used two holes located on either side
> of the "D" bulkhead with each hole approximately 3" in dia. Screen was
> laid over the hole from the back side and painted black. Adds a nice
> effect.
>
> Erich Trombley
> A028
>
>
> writes:
> > Has anyone sorted out the question of the need for air venting
> > arrangements
> > to increase the through flow of air? There is clearly a way out
> > through
> > throttle and gear lever slots but the reports of doors tending to
> > bulge
> > outwards in flight suggest these may not be enough (unless of course
> > the
> > doors are also included in the low pressure zone that stops overhead
> > NACA
> > vents working in the right direction). I wondered whether it might
> > be
> > worthwhile to have a hole through the rear bulkhead to allow flow
> > through
> > into the rear fus. and out then through the flap and trim
> > slots.David Joyce
> > 402
> >
> > The Europa List is supported by Aviators Network UK -
> > info@avnet.co.uk
>
> ________________________________________________________________
>
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