Quote:
Originally Posted by christofoo
Extended the Kammback (rear windshield cover) to the rear bumper, also I added a baffle to stop flow from the side, (also I found a less bumpy road).
So this configuration is: - Full Kammback
- Rear wheel skirt
- Baffles between the car and the box, both horizontal and vertical.
- Aero Hitch Box
- EDIT: also I put the passenger side mirror back on, since I'm blocking 90% of the rear-view with the cardboard
Results:
I think that looks a lot better. The full Kammback always seemed like the solution that just had to work.
Video, cruising speed ranges a little from 30-40 MPH:
Well, I mean it still isn't perfect. I still need to find a form that fixes the turbulence on the side of the Aero Hitch Box, if possible.
But I think my next task is Kammback fab. (And duct tape gum removal... any pointers?)
EDIT: I forgot to mention; while I was scouting the road for this test this morning, I saw the sweetest full aero shell on a recumbent bike (velomobile). I wish I'd had time to snap a picture, but it was headed the other way. I think it was going at least 30 MPH on a very slight uphill. I wished I could have stopped the guy and asked if he made it himself, and if it was for a competition or not. I was so jealous. |
It's the gap which is affecting the side flow.Over at the full-boat-tail trailer thread is a pictorial drag table depicting a Clark-Y airfoil of differing gap configurations and the drag as a function of position or magnitude.
The baffles will help create locked-vortices around which the outer flow will skip across.
As long as air can pass right through it's impossible for the air to be directed.