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aerohead · 02-14-2014, 06:03 PM

I expanded and modified a graphic for canopy drag published in Goro Tamai's "THE LEADING EDGE".
What's unique about the data concerns 'reversed' bodies.Since 1974 I've seen less than a handful of images depicting drag measurements of 'reversed' teardrops.They're dramatic in that the significance of losing the boat tail really shows up no matter how slick the nose is.
All seven images,when viewed from above (plan view)are teardrops,with aft-body plan-taper to a point.
All Cds are approximations,as they vary as a function of where they're positioned on a body,and the quality of the boundary layer at any given location.The numbers were generated in MIT's wind tunnel.

Here is a drag table for aircraft canopies from Hoener's book,'AERODYNAMIC DRAG',

Here are some armaments enclosures:

02-14-2014, 06:03 PM	#1 (permalink)
aerohead Master EcoModder Join Date: Jan 2008 Location: Sanger,Texas,U.S.A. Posts: 16,267 Thanks: 24,392 Thanked 7,360 Times in 4,760 Posts	Canopy drag I expanded and modified a graphic for canopy drag published in Goro Tamai's "THE LEADING EDGE". What's unique about the data concerns 'reversed' bodies.Since 1974 I've seen less than a handful of images depicting drag measurements of 'reversed' teardrops.They're dramatic in that the significance of losing the boat tail really shows up no matter how slick the nose is. All seven images,when viewed from above (plan view)are teardrops,with aft-body plan-taper to a point. All Cds are approximations,as they vary as a function of where they're positioned on a body,and the quality of the boundary layer at any given location.The numbers were generated in MIT's wind tunnel. Here is a drag table for aircraft canopies from Hoener's book,'AERODYNAMIC DRAG', Here are some armaments enclosures: __________________ Photobucket album: http://s1271.photobucket.com/albums/jj622/aerohead2/ Last edited by aerohead; 02-19-2014 at 07:05 PM.. Reason: add 2nd Hoerner table