I've been posting my b&w conversions in several different locations on POTN. Finally decided to start a thread specifically dedicated to monochrome aviation images. I'll get the ball rolling with a few of my favorites.
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Maid in the Shade
IMAGE LINK: http://www.flickr.com/photos/jeffwelker/6625282575/
I hope others will share their monochrome conversions. I'd love to see this thread grow to many, many pages of wonderful b&w aviation images. C'mon now, let's see what you've got