Quote:
Originally Posted by Xist
Can you give me any examples? Just whisper into my microphone--I mean, my ear!
I think that it was Aerohead that said that in a windtunnel, the air going over the trunk of a 914 actually flowed forward!
Stuff like that?
I have seen this diagram several times lately and when Aerohead shared it in http://ecomodder.com/forum/showthrea...rag-25845.html I responded:
and he answered:
You guys seem to have agreed that attached flow is not enough, but would you have even that much if the angle is too steep? |
If the contour is steeper than the 'Template' it puts the boundary layer in a very precarious position.The sudden pressure rise will trigger separation and your wake begins right there,with a tremendously low base pressure,killing you with pressure drag.
The 1922 Klemperer' streamlined brick runs a 'fast' rear contour but it won't go below Cd 0.15.It's right at 22-degrees and it gets there pretty fast.