View Single Post
Old 08-04-2022, 03:26 PM   #9 (permalink)
aerohead
Master EcoModder
 
aerohead's Avatar
 
Join Date: Jan 2008
Location: Sanger,Texas,U.S.A.
Posts: 15,965
Thanks: 24,045
Thanked 7,244 Times in 4,669 Posts
trailer box-cavity option

https://ecomodder.com/forum/member-a...ion-plates.jpghere's the original box-cavity, by Continuum Dynamics, financed with a Defense Advanced Research Projects Agency (DARPA ) / Small Business Administration' ( SBA ) innovation and research grant.
You may notice how 'shallow' the vortices are, captured along the spans of the four longitudinal panels.
This mimicks the onset of roof curvature transition 'roof-bending', as seen in W. A. Mair's torpedo boat-tailing. NASA's Project Shoebox. Walter Korff's 1963, Cd 0.20 semi-trailer. R.B. Potter's March 6, 1956 US Patent# 2,737,411. Union-Pacific Railroad's aerodynamic tail-car of 944. Airship Hindenburg. Koenig-Kamm half-bodies of the mid-1930s. Walter Lay's low drag models of 1933. Airship ' City of Glendale, by Thomas Benton Slate, 1929. Paul Jaray's 'pumpkin seed of 1922. Samuel L. Calthrop's 'Air Resisting Train' tail-car of 1965.
--------------------------------------------------------------------------------------
Introducing a more radical change in initial cross-section violates adverse pressure gradient boundary-layer rules emphasized by by Wolf Heinrich Hucho, and his mentor, Dr. Hermann Schlicting, who literally wrote the book ' Boundary-Layer Theory.'
Attached Thumbnails
Click image for larger version

Name:	member-aerohead-albums-other+vehicles+1-picture205-transport-drag-reduction-plates.jpg
Views:	56
Size:	73.7 KB
ID:	32712  
__________________
Photobucket album: http://s1271.photobucket.com/albums/jj622/aerohead2/
  Reply With Quote