[JulianEdgar]

Originally Posted by aerohead

1) 'downwash' flow is downwash flow.
2) Sure, the tufts are oriented as if they were is a more favorable pressure regime, streamlines were diverging, pressure building, base pressure increasing, drag reducing.
3) That's not happening at all.
4) You have a small wake of extremely low pressure, plus concomitant attached vortex drag of the highest order, high lift, and overall higher drag, compared to a streamlined aft-body.
5) At 30-degrees you're entering bistable flow, of the highest imaginable drag known, so in that respect either a more stable, fastback or squareback wake in desirable. Either one is better.

You didn't address any of the points that were made.

No technical reference or specialist has a definition of attached flow that excludes attached flow being caused by downwash.

You've made up your own definition of the term. That's very odd.