Quote:
Originally Posted by Piotrsko
Julian Edgar favored god awful gottengen profiles around his A pillar edges, but i think they were a radius increase instead of an intentional drag reduction.
|
Julian's a fan of the 1937 Schl'o'rwagen ( so am I ), and it was based on the leading edge of the G'o'ttingen 571 profile, and aft-body of the G'o'ttingen 570 profile.
His use on A-pillars may be an homage to to Ludwig Prandtl, Schl'o'r, and the other gentleman who created the car.
--------------------------------------------------------------------------------------
The notion of:
Turning vanes
Guiding vanes
Annular airfoils
Auxiliary airfoils
Large Eddy Break Up ( LEBU ) devices have been explored by:
Frey, Townsend, Fl'u'gl, and NACA/NASA
between 1930, and the 1980s.
-------------------------------------------------------------------------------------
They were primarily intended only for 2-D flow, however, use on busses were also explored.
-------------------------------------------------------------------------------------
Only the NACA, radial engine cowl was adopted for commercial application, and are still flying today.
------------------------------------------------------------------------------------
As far as busses, it's not the 1930s, and on the Greyhound Bus I rode home from Arkansas this year, the nose drag constituted only 5.8% of overall drag, with surface friction at 21.5%, and 72.6% base drag.
As Freeman Thomas, of Audi & Ford Motor Company has said 'Aero is more about the rear of the car than the front.'