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Old 04-18-2013, 04:37 AM   #121 (permalink)
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Quote:
Originally Posted by Piwoslaw View Post
The attention I had in mind was from the law enforcement rednecks


OK, that makes sense. I can't wait to see which mirrors you find, I'm thinking about something smaller to replace my passenger mirror.
I was passing many police cars and no attention at all.

I have something on my mind and maybe soon you'll see a finished product

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Gerhard Plattner: "The best attitude is to consider fuel saving a kind of sport. Everybody who has enough money for a strong car, can drive fast and hit the pedal. But saving fuel requires concentration, self-control and cleverness. It's a challenge with the nice effect of saving you money that you can use for other more important things."
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Old 04-19-2013, 06:41 AM   #122 (permalink)
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I know I can't count the gain from miniskirts directly but I've decided to do that anyway
And FE was better by 3.5% (best FE without miniskirts vs last tank). Of course I should do at least coast down test or full A-B-A test, but that's not so important for me. And to be honest the extra attention from drivers passing me was a very funny experience. So now I need to build full skirts for rear wheels, painted to match Berta's color.
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Gerhard Plattner: "The best attitude is to consider fuel saving a kind of sport. Everybody who has enough money for a strong car, can drive fast and hit the pedal. But saving fuel requires concentration, self-control and cleverness. It's a challenge with the nice effect of saving you money that you can use for other more important things."
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Old 04-21-2013, 01:36 PM   #123 (permalink)
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I've seen you overtook the aerodynamic stage of you project, but playing yesterday with a flow simulator (which is approximation and even misleading) I have seen that the flow on the back of 316 is not so bad (compared with my 2008 focus hatchback) and the turbulence on the back in case of your kamm is amplified.

A trunk lip (quite long I will say) may do a better job. Something to test if you'll like.

Last edited by calfianu; 04-22-2013 at 02:29 PM..
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Old 04-21-2013, 04:46 PM   #124 (permalink)
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If you've read my whole thread then you should know that I'm planning a kammback for Berta. Coast down tests showed up ~9% improvement, so that's something worth to fight for. I can tell that hatch is too steep to have good airflow. It's based of an observation of water droplets which are not moving at all while driving. So there's no flow attached for sure. And when I've tested airflow over kammy it was just perfect. So my plan is to build kammy for Berta, and I'm hoping that will be soon, together with my custom coded MPGuino and smaller rear-view mirrors. I'm planning rear wheel skirts as well, and maybe a bellypan in the future.
So many ideas and so little time for realization.
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Gerhard Plattner: "The best attitude is to consider fuel saving a kind of sport. Everybody who has enough money for a strong car, can drive fast and hit the pedal. But saving fuel requires concentration, self-control and cleverness. It's a challenge with the nice effect of saving you money that you can use for other more important things."
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Old 04-22-2013, 04:26 PM   #125 (permalink)
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Quote:
So many ideas and so little time for realization.
You said it.
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Old 04-22-2013, 05:00 PM   #126 (permalink)
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I am looking forward to your progress! I hope to learn a few things.
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Old 04-22-2013, 06:21 PM   #127 (permalink)
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Lets hope you'll see a progress soon
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Quote:
Gerhard Plattner: "The best attitude is to consider fuel saving a kind of sport. Everybody who has enough money for a strong car, can drive fast and hit the pedal. But saving fuel requires concentration, self-control and cleverness. It's a challenge with the nice effect of saving you money that you can use for other more important things."
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Old 05-01-2013, 05:43 PM   #128 (permalink)
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Today I needed to go somewhere and I've made ~200 miles trip. And I've noticed that I miss my cardboard rear wheel skirts! I was literally feeling the draft of real wheel arches. I needed to take them out, because of annual vehicle inspection and rain which destroyed them anyway.
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Quote:
Gerhard Plattner: "The best attitude is to consider fuel saving a kind of sport. Everybody who has enough money for a strong car, can drive fast and hit the pedal. But saving fuel requires concentration, self-control and cleverness. It's a challenge with the nice effect of saving you money that you can use for other more important things."
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Old 05-02-2013, 01:29 AM   #129 (permalink)
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Ah, sounds like it is time to make some (semi)permanent ones!
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Old 05-04-2013, 05:37 PM   #130 (permalink)
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I'm hoping I'll do that soon

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Gerhard Plattner: "The best attitude is to consider fuel saving a kind of sport. Everybody who has enough money for a strong car, can drive fast and hit the pedal. But saving fuel requires concentration, self-control and cleverness. It's a challenge with the nice effect of saving you money that you can use for other more important things."
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