lower step
Yes,below the backlight,like the Harrod Helper and Ernie Roger's Bug wing.It helps compartmentalize the turbulence.
What freebeard has rendered in his upper drawing of #30 permalink is the idea.
Any of that length would help if it didn't interfere with the trailer.
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Photobucket album: http://s1271.photobucket.com/albums/jj622/aerohead2/
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