Delta Ratio

From:         "John D. Lundell" <lundell@winternet.com>
Organization: University of North Dakota; Grand Forks, ND
Date:         03 Sep 96 01:16:59 
Followups:    1
Next article
View raw article
  or MIME structure

I ran accross the term "Delta Ratio".  I believe it has something to do
with takeoff performance over obstacles.  Can anyone give me a detailed
message of what "Delta Raio" means?