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Jim Bullis · 09-13-2010, 02:14 PM

Hi Neil,

I know of two ways to achieve the two feet above the ground height.

And two feet is the requirement, sort of, for a thin body of revolution.

Yes, there will be separate aerodynamic entities near the ground, but these are very low profile so that the drag on these, including ground effect associated with these, is not large compared to the main aerodynamic entity which is the thin upper body.

So the two ways I know to achieve the two feet are attached with thin struts designed also to make the main body work as it would in free flow. These will not be as close to the ideal as the supports used in wind tunnel measurements, but the objective is to get as close as possible to this condition.

09-13-2010, 02:14 PM	#88 (permalink)
Jim Bullis EcoModding Lurker Join Date: Jul 2008 Location: California Posts: 80 Thanks: 0 Thanked 2 Times in 2 Posts	Hi Neil, I know of two ways to achieve the two feet above the ground height. And two feet is the requirement, sort of, for a thin body of revolution. Yes, there will be separate aerodynamic entities near the ground, but these are very low profile so that the drag on these, including ground effect associated with these, is not large compared to the main aerodynamic entity which is the thin upper body. So the two ways I know to achieve the two feet are attached with thin struts designed also to make the main body work as it would in free flow. These will not be as close to the ideal as the supports used in wind tunnel measurements, but the objective is to get as close as possible to this condition.