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Re: 4 winged dino NOVA

Tim Williams writes:

Jim Cunningham wrote:

Also, folks seem to overlook the substantial contribution of a set of fixed trailing airfoils to increasing the thrust coefficient of the flapping wings in front of them. The hindlimbs may have developed to enhance flapping flight rather than gliding flight. For that purpose, there is no particular requirement for a splayed horizontal positioning of the posterior airfoils.

How does this accord with Chatterjee and Templin's biplane model of phugoid gliding? Does the same principal hold for your flapping-flight scenario?

Chatterjee, S. & Templin, R. J. (2007). Biplane wing planform and flight performance of the feathered dinosaur _Microraptor gui_. PNAS 104: 1576â1580.

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Dann Pigdon
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