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Old 05-15-2009, 08:02 AM   #21 (permalink)
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I don't think there's a dedicated thread, and I'm not sure if Ernie sells these. Perhaps he'll start a thread.

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Old 05-15-2009, 12:41 PM   #22 (permalink)
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herrod helper article

Does anyone have that magazine article on the herrod helper? I would really like to see the mpg results.
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Old 05-16-2009, 03:02 AM   #23 (permalink)
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Quote:
Originally Posted by MetroMPG View Post
Oh, found the thread where Phil referred to this spoiler: http://ecomodder.com/forum/showthrea...lips-2685.html
It's nice to see people notice.

Actually, a few years ago I measured my Cd with my Beetle wing and got about Cd = 0.31, which is more believable.

Ernie Rogers
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Old 05-16-2009, 03:18 AM   #24 (permalink)
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Who, me?

Quote:
Originally Posted by MetroMPG View Post
I don't think there's a dedicated thread, and I'm not sure if Ernie sells these. Perhaps he'll start a thread.
I am greatly impressed by the level of conversation here. No, I have not tried to sell plans or anything for my wing. In 2004, I visited the VW design center in California. The lead guy was very knowledgeable (can't remember his name) but he said the top management just weren't interested in low drag designs. And, he probably thought it looked funny. But that was ages ago.

It's easy to make a wing that works well. Just shape it to raise the pressure in the back without getting in the way--let the flow descend slightly. I added a trick-- I left a crack of about one inch between the wing and the body to keep the flow attached as it transitioned to the wing. The entire design was by "feel"-- no calculations or tests were done.

The problem with duplicating my wing is in making the attachment. It is a steel piece that fits over the edge on each side and is secured with screws into the underside of the hatch where they don't show. There is no easy way to make these pieces without a lot of drawing, and then fabricating.

Anyway, many people have asked about it but nobody has built one. I think it has very low commercial value now that the "old" Beetle is due to be discontinued after 2009.

Ernie Rogers
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Old 05-16-2009, 12:34 PM   #25 (permalink)
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could you post more pictures?

maybe a little bit about how you made it/installed it

that would all be super helpful =)
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Old 05-16-2009, 03:28 PM   #26 (permalink)
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Help with pictures?

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Originally Posted by alohaspirit View Post
could you post more pictures?

maybe a little bit about how you made it/installed it

that would all be super helpful =)
aloha,

I just tried to post some pictures. I can't figure out how to copy them from my hard disk to this screen. Any advice?

Ernie Rogers
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Old 07-17-2012, 07:31 PM   #27 (permalink)
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Not to dredge up an old thread, but I noticed on here that someone said they didn't know why it was called the Herrod Helper. My spouse's (Gary Herrod) grandfather invented them and they took his last name. They do work...I can't regurgitate the exact details, but Gary could. We used it on our racecar for a time in 2009 and 2010, though I couldn't attach a photo because I haven't enough posts on here. You can always contact us if you want photos and information.

Anyway, I hope that clears things up. Small fun fact for the day.

Megan
Two Larrys Racing & The Green Booger
twolarrysracing.com

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