Quote:
Originally Posted by freebeard
My reading of Figure 16 had Cp-X only negative at 15° yaw and only through the front wheelwell area, not forward of it.
|
The key here is the slope of the line, which tells you how drag varies (and how much) with length. From the rounded corners back, at both 0 and 15 degrees, the negative slope shows that the x-component of pressure is negative (i.e. it's producing thrust). You can see this in Fig. 14, where the large green area on the body in front of the wheels shows a negative (i.e. forward-directed) x-component of pressure.
Quote:
Originally Posted by freebeard
I'm trying to figure out the significance of Figures 14 and 15. I can see separating out the X and Z vectors, but the blue bottom in 15. — is that a ground interaction?
|
Perhaps, but this figure doesn't actually tell us that. It shows that there is a negative z-component of pressure over much of the underside, but it doesn't say why (and I don't believe the authors say either).