Writer seeking examples of tested DIY aero mods for book

[freebeard]

I don't think the roofline is ugly at all. OTOH those corrugations over the wheel arches! What purpose do you think they serve, other than panel stiffening?

[JulianEdgar]

Originally Posted by Vman455

The rear wheel arch lip is to satisfy European wheel coverage requirements, as I posted in another thread here recently:



I first noticed these on a Miata and its Fiat twin at an auto show last year, so I looked them up. Now I see them everywhere, and many of them are molded into the wheel arch trim as on the CH-R rather than a separate piece as on the Miata or Prius.

Thank you for that correction.

[Vman455]

Originally Posted by JulianEdgar

Thank you for that correction.

No problem! I hope you keep these videos coming, I'm enjoying them immensely.

[Snax]

Me too. The discussion of the C-HR has me thinking about the rear wing on the old Cosworth Escorts with it's massive extension over the back glass. Clearly the intent is a bit different however.

[freebeard]

....about the rear wing on the old Cosworth Escorts with it's massive extension over the back glass. Clearly the intent is a bit different however.

Looking at the overhead view, it appears the airfoil is positioned to allow a more aggressive breaking curve at the top of the rear window.

I'm thinking this might be a better solution than a Kammback for my Dasher 3-door.

[aerohead]

Originally Posted by freebeard

Looking at the overhead view, it appears the airfoil is positioned to allow a more aggressive breaking curve at the top of the rear window.

I'm thinking this might be a better solution than a Kammback for my Dasher 3-door.

Around 1992,Ford of Cologne,Germany constructed a homologation special Escort for rally competition.It had a rather large rear foil,which increased drag,increased fuel consumption, and lowered top speed;but it did improve high-speed competition performance.

[freebeard]

Well, that's easy. Just go for downforce.

[JulianEdgar]

I have been doing another batch of videos.

Ducted radiators: https://youtu.be/P7Wh1XoystM

A good way of measuring car lift (and lower lift usually equals lower drag!): https://youtu.be/wmleR-BNOV8

Trailing vortices and drag: https://youtu.be/yCrXHldsKLA

Vortex generators - fads and fashions: https://youtu.be/1OzHIsRsS40

Reducing rear vision mirror drag: https://youtu.be/wDB2y0LuBek

[freebeard]

You've been busy. What are the relative merits for getting you message out, of Autospeed, your book, and videos on Youtube?

Trailing vortices and drag: You may get gentle rains and sunshine, but in the Pacific Nortwest, in a driving rain on the Interstate, you get a good view of vortexes. I like the trucks with lateral vortexes projecting out of the front wheel wells. Water has more mass than air which complicates things, but the water likes low pressure areas.

Vortex generators: I was hoping for fads or fashions in vortex generators. A few years back it was glowing plasma actuators.

[JulianEdgar]

Originally Posted by freebeard

You've been busy. What are the relative merits for getting you message out, of Autospeed, your book, and videos on Youtube?

Trailing vortices and drag: You may get gentle rains and sunshine, but in the Pacific Nortwest, in a driving rain on the Interstate, you get a good view of vortexes. I like the trucks with lateral vortexes projecting out of the front wheel wells. Water has more mass than air which complicates things, but the water likes low pressure areas.

Vortex generators: I was hoping for fads or fashions in vortex generators. A few years back it was glowing plasma actuators.

Autospeed now has nothing to do with me - it's a previous employer, no more and no less.

Books to me are 'real' (citable, criticisable, published) and conversely, YouTube videos are just fluff. I do the YouTube videos only to promote the books. One paragraph in a book is a full YouTube video!!

WRT to vortices, I think it has to be fine spray and not rain ie a mist of tiny droplets. I've driven in the US north west, and I didn't see the conditions I am describing very often.

Yes, I get emails about plasma actuators and the like....