Welcome to European Tribune. It's gone a bit quiet around here these days, but it's still going.
There are aerodynamic and speed changes that can improve efficiency.

Boeing has come up with several of them and mostly they require lower speeds ( by about 100mph ) and/or implementing the blended wing body (BWB).

I can provide concept images if there is interest.

Even a well designed winglet improves in flight consumption by almost 10% and I still do not understand why there are airplanes that fly without them.

Orthodoxy is not a religion.

by BalkanIdentity (balkanid _ at _ google.com) on Wed Sep 27th, 2006 at 11:37:25 AM EST
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concept images

There's always interest in concept images ...
by Colman (colman at eurotrib.com) on Wed Sep 27th, 2006 at 11:39:35 AM EST
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From: FINAL TECHNICAL REPORT: Liquid Hydrogen Fuelled Aircraft - System Analysis

The struggle of man against tyranny is the struggle of memory against forgetting.(Kundera)

by Elco B (elcob at scarlet dot be) on Wed Sep 27th, 2006 at 12:25:29 PM EST
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