Quote:
Originally Posted by sgtlethargic
Aerohead,
Will you please take a few minutes and explain the dashed lines, especially the one I marked? I think I understand the other dashed lines to represent the top (plan) view.
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The outer-most dashed lines define the forebody of the original 'donar' 2.5:1 streamline body of revolution in its entirety.
I 'reduced' the nose section to more of a 1/2 convex hemisphere,rather than the prolate ellipsoid original,as every reference I have for automotive streamlining effectively discounts the entire forebody.The 1/2-hemi 'bulbous'-nose has demonstrated lowest drag for crosswind conditions,so it became the 'default' forebody.
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The premise for the 'Template' was the extremely careful handling of the airflow over the aft-body which prevents separation,which is what all aerodynamicists agree is THE target for streamlining.In this respect,the nose is of little import to us.