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View Poll Results: Would you be interested in an Android App for measuring the Cd of your vehicle
Yes- as you've described it 13 54.17%
Yes- but some mild changes needed 2 8.33%
No- Major changes needed to interest me 0 0%
No- not interested 2 8.33%
Yes but owns a non Android phone (iPhone, windows, other) 7 29.17%
Voters: 24. You may not vote on this poll

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Old 03-05-2012, 01:14 PM   #11 (permalink)
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Cx' is the sum of all coefficients of drag. I wouldn't care if I didn't know my exact Cd, as long as I could see an improvement in overall drag. And as I said, it IS possible to extrapolate Cr from a stock car, using published Cd, with a high degree of accuracy.

do you think I should make a new thread?

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Old 03-05-2012, 01:21 PM   #12 (permalink)
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Sure, if you want to.

I think it's worth doing.
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Old 07-29-2012, 08:38 AM   #13 (permalink)
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I'd certainly appreciate an android app to calculate Cd.
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Old 07-29-2012, 09:52 AM   #14 (permalink)
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This really would be great. Especially since android is so cheap, you can e bay a phone for 30 bucks, and buy a pre paid t mo or cingular if you want the data, as in no wifi, or to use the internet features.

It is a little lame that there won't be a precise number for actual cd, BUT for eco modders it shouldn't matter, as we are just looking at change and improvement.

So if we do the tests on the same roads near us, we will see the same results, and notice differences, especially if you are able to utilize all the points in the first post. This seems like a fantastic idea, and I highly anticipate it's release.

I would think this could be a good way to spark interest with others into lowering their cd.
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Old 07-29-2012, 01:31 PM   #15 (permalink)
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ERTW -

Quote:
Originally Posted by ERTW View Post
Cx' is the sum of all coefficients of drag. I wouldn't care if I didn't know my exact Cd, as long as I could see an improvement in overall drag. And as I said, it IS possible to extrapolate Cr from a stock car, using published Cd, with a high degree of accuracy.

do you think I should make a new thread?
Yes, then we can ask questions about how to mitigate the flaws. I still think the best test is a road on a hill in the middle of NOWHERE followed by a long flat interval. That way you can coast to the bottom gaining speed and then coast to a stop. Multiple runs in mode X will yield an error factor that you can take into account on subsequent runs in mode Y.

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Old 07-29-2012, 08:54 PM   #16 (permalink)
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ajohn7211 -

I voted "some changes" as a function of other people's feedback to this thread. In any case I would say you could do it your way for v1.0 and see what happens.

Are you going to charge for the App? If yes then would it be the "dollar app" or more pricey? I'm interested in your mind-set, aka a learn-Android exercise or a spin-off to making $.

For the class I would guess that you are deliberately using Android. Down the road you could re-implement it in the at-present-amorphous "HTML-5" and then you would be forward-compatible to platform independence.

CarloSW2

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