Hmmm.
Agreed that Cd probably changes little. But cross sectional area is
increased. And there is likely an increased risk of flow separation with
the revised arrangement.
Duncan McFadyean
On Thursday, June 13, 2002 4:09 AM, DJA727@aol.com [SMTP:DJA727@aol.com]
wrote:
> In a message dated 6/11/2002 1:43:22 PM Pacific Standard Time,
> ami@mcfadyean.freeserve.co.uk writes:
>
>
> > What about increased frontal area?
> >
> >
>
> The frontal area is really not the issue. In high speed aircraft, the
"coke
> bottle" rule gives minimum drag (constant cross section area on the
fuselage
> (look at a Learjet). If you have flow separation because of an increase
in
> frontal area, then you will have additional drag. The transition on these
> windows needs to be gradual to avoid that. Look at the 747 upper fuselage
for
> example.
>
> Dave A227
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