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 Guessing Eivie IV CdA - Collecting Donations

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T O P I C    R E V I E W
DamjanZ Posted - 06/23/2014 : 02:41:33
Dear streamline fellows!

It is a long way before bike is ready for accurate CdA measurements and extraction in real conditions. I did that on 7th and 8th June this year at Dekra Test Oval, Germany.

Enthusiasm inspired my heart again, being determined to attend WHPSC 2014. More odds for that to happen come together with your help.

Life is a game, so let's play. In this topic you can guess what the *CdA of Eivie IV is by donating at least $100 for my WHPSC 2014 attendance:

http://www.eivie4.com/donate/

Although you can donate any amount, lower or higher of $100. When your guess matches within relative error of +- 0.5%, I confirm it. If it stays unrevealed, I reveal the exact CdA when sum of all donations reach our goal of $8,000.

*CdA in square meters, for example CdA of Eivie III is 0.0125 m^2

Thank you so much for participating!



Video: http://www.youtube.com/watch?v=XAUbhkadKDU

Damjan

"Rowing forwards is possible, but hard."
17   L A T E S T    R E P L I E S    (Newest First)
Eduardo Posted - 10/20/2014 : 15:50:47
.Damjan Georgi y Matt son los mas grandes diseñadores de este deporte,....y posiblemente no sea una precisa medicion del coeficiente aerodinamico,..... es una estimacion aproximada y adecuada a los medios disponibles....A David le pregunto si seria apropiado desarrollar un medio eficiente para medir la velocidad del viento en los 200 metros ?...

Damjan Georgi and Matt are the greatest designers of the sport, .... and it may not be an accurate measurement of the aerodynamic coefficient, ..... is a rough estimate and appropriate measures available .... David I wonder if it would be appropriate to develop an efficient means to measure the wind speed in the 200? ..
davidw Posted - 10/18/2014 : 05:29:31
I merely wonder how you managed to measure drag to within that level of accuracy...
I don't think that is possible/realistic.
DamjanZ Posted - 09/18/2014 : 08:45:37
I will expand this game into the next racing season. We need to attend WHPSC 2015 for sure. When I collect $1,400 more, I reveal the winner of the game.

Damjan

"Rowing forwards is possible, but hard."
DamjanZ Posted - 08/28/2014 : 10:00:51
Matjaz leskovar guesses the Cda is 0.011 m^2. Not.

Thank you!

Let me update the guessing of Eivie IV CdA:

-It is not 0.0085 m^2 +- 0,5 %
-It is not 0.009 m^2 +- 0,5 %
-It is not 0.01043 m^2 +- 0,5 %
-It is not 0.0105 m^2 +- 0,5 %
-It is not 0.011 m^2 +- 0,5 %
-It is not 0.0115 m^2 +- 0,5 %
-It is not 0.0127 m^2 +- 0,5 % and
-It is not 0.0179 m^2 +- 0,5 %

Damjan

"Rowing forwards is possible, but hard."
DamjanZ Posted - 08/28/2014 : 04:52:16
Aurelien Bonneteau guesses the Cda is 0.0085 m^2. Not.

Thank you!

Let me update the guessing of Eivie IV CdA:

-It is not 0.0085 m^2 +- 0,5 %
-It is not 0.009 m^2 +- 0,5 %
-It is not 0.01043 m^2 +- 0,5 %
-It is not 0.0105 m^2 +- 0,5 %
-It is not 0.0115 m^2 +- 0,5 %
-It is not 0.0127 m^2 +- 0,5 % and
-It is not 0.0179 m^2 +- 0,5 %


Damjan

"Rowing forwards is possible, but hard."
Garrie L Hill Posted - 08/27/2014 : 06:02:15
N = Mod[ donation/100 ] There! I finally put to use that 6th grade math class ;-)

Garrie "carbon based lifeform" Hill
HPRA Co-Dictator of the East
for pics of some of my time and money sucking projects
http://garriehill.winkflash.com/
and
http://s58.photobucket.com/albums/g277/cfbb/
and videos
http://vimeo.com/5513519


DamjanZ Posted - 08/27/2014 : 04:20:44
I tweak this game a little bit:

the one who makes the best guess, will earn Eivie I, Eivie II and Eivie III three-dimensional drawings. I award this after I collect another $2.000. And as you noticed, everybody can guess up to N-times. N is donation amount divided by 100 in integer number, truncated.

P.S. For some reason not everybody guesses and not everybody uses all the available tries here.


Damjan

"Rowing forwards is possible, but hard."
DamjanZ Posted - 08/26/2014 : 12:59:41
Garrie Hill guesses the Cda is 0.009 m^2. Not.

Thank you!

Let me update the guessing of Eivie IV CdA:

-It is not 0.009 m^2 +- 0,5 %
-It is not 0.01043 m^2 +- 0,5 %
-It is not 0.0105 m^2 +- 0,5 %
-It is not 0.0115 m^2 +- 0,5 %
-It is not 0.0127 m^2 +- 0,5 % and
-It is not 0.0179 m^2 +- 0,5 %


Damjan

"Rowing forwards is possible, but hard."
DamjanZ Posted - 08/25/2014 : 08:55:40
quote:
Originally posted by Tomslick

That would be great if you were able to make it Damjan. Your new speedbike has so much potential, and it would be nice to see you get the maximum speed fom it. I hope to see you make it to Battle Mountain this year. Good luck!

Tom Amick




It makes me happy when I read such comments. Thanks Tom!

Damjan

"Rowing forwards is possible, but hard."
Tomslick Posted - 08/25/2014 : 08:49:21
That would be great if you were able to make it Damjan. Your new speedbike has so much potential, and it would be nice to see you get the maximum speed fom it. I hope to see you make it to Battle Mountain this year. Good luck!

Tom Amick
Eduardo Posted - 08/25/2014 : 07:15:17
Muy buena pista de aterrizaje Damjan,....¡Buena suerte campeon!..
DamjanZ Posted - 08/25/2014 : 04:44:13
The bike is solid rock stable, plus I know the CdA is very good. Please donate some more and I might come to Battle Mountain this year, showing full potential of Eivie IV and me. It is a very different story than the last year

www.eivie4.com/donate

Here is my last video:
https://www.youtube.com/watch?v=nIa8Tf5q7x0


Damjan

"Rowing forwards is possible, but hard."
DamjanZ Posted - 08/01/2014 : 04:48:57
Wulf Kraneis guesses the Cda is 0.0115 m^2. Not.

Thank you!

Let me update the guessing of Eivie IV CdA:

-It is not 0.01043 m^2 +- 0,5 %
-It is not 0.0105 m^2 +- 0,5 %
-It is not 0.0115 m^2 +- 0,5 %
-It is not 0.0127 m^2 +- 0,5 % and
-It is not 0.0179 m^2 +- 0,5 %


Damjan

"Rowing forwards is possible, but hard."
DamjanZ Posted - 07/09/2014 : 00:04:43
Let me update the guessing of Eivie IV CdA:

-It is not 0.01043 m^2 +- 0,5 %
-It is not 0.0105 m^2 +- 0,5 %
-It is not 0.0127 m^2 +- 0,5 %
-It is not 0.0179 m^2 +- 0,5 %

Damjan

"Rowing forwards is possible, but hard."
DamjanZ Posted - 07/08/2014 : 11:05:05
Let me update the guessing of Eivie IV CdA:

-It is not 0.0105 m^2 +- 0,5 %
-It is not 0.01043 m^2 +- 0,5 %

Damjan

"Rowing forwards is possible, but hard."
DamjanZ Posted - 06/27/2014 : 01:58:32
The one who guesses the CdA right, will get free Eivie II and Eivie III drawings in 3-D.

Damjan

"Rowing forwards is possible, but hard."
DamjanZ Posted - 06/23/2014 : 10:55:17
We have the first donator, Cedric Kaltenrieder, with his guess: 0,0105 m^2.
He is right to be a fan, but his guess is wrong THANKS!

Damjan

"Rowing forwards is possible, but hard."

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