Posted for "Eric M. Jones" <emjones@charter.net>:

One of the products I am going to sell on my website someday are adjustable
NACA ducts. The surface tangent to the aircraft stays the same but the ramp
drops down and the opening increases. This takes care of most problems and
reduces noise. (and makes your airplane go faster.....).

The ducts could be completely closed too. The remaining shape looks like a
plan view of the Concord with the nose chopped.

Regards,
Eric M. Jones
www.PerihelionDesign.com
113 Brentwood Drive
Southbridge MA 01550-2705
Phone (508) 764-2072
Email: emjones@charter.net