Dragon Events Tail of the Dragon (Highway US129) 318 curves in 11 miles, is America’s number one motorcycle and sports car road.

Days til DBRXI...

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Old May 25, 2011 | 04:40 PM
  #1671  
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Is it time to go yet?
Old May 25, 2011 | 04:40 PM
  #1672  
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How about now?
Old May 25, 2011 | 04:42 PM
  #1673  
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Now?
Old May 25, 2011 | 04:49 PM
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Old May 25, 2011 | 05:33 PM
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Originally Posted by Lovetodrive2000
Originally Posted by RedCelica' timestamp='1306355736' post='20615278
[quote name='Lovetodrive2000' timestamp='1306354858' post='20615202']
I think almost all cars will take the same amount of time in the 1/4 mile....

If the 1/4 mile is vertical and they are dropped from a plane!
Not necessarily...you must calculate for mass, drag and surface area as well.



where
Vt = terminal velocity,
m = mass of the falling object,
g = acceleration due to gravity,
Cd = drag coefficient,
ρ = density of the fluid through which the object is falling, and
A = projected area of the object.

So an s2000 might have a terminal velocity of:

m = 2850 lbs
g = 32.174 fps^2
Cd = 0.29 (top up)
p = http://en.wikipedia.org/wiki/Density_of_air assumed 25 deg C (77F) air temp avg. density is calculated as 1.1839 kg/m^-3 or .7513148 kg/m converted to lb/ft = 5.43439476286025 lb/ft
A = This is kinda hard, so Im going to guess knowing that the s2000 is 68.9 in wide and 50.0 in high and then take 33% of that is roughly 94.7375 ft^2

sqroot of 183391.8/149.304 = 35.047 fps

The terminal velocity of an S2000 is approx. 35.047 feet per second.

Using the basic formula for a falling object sqroot(2d/v) = sqroot(2640/35.0470) = 8.679 seconds @ 207.27 mph

The result assumes that the 1320 ft begins with the point at which the vehicle reaches terminal velocity...I'll have to calculate the differentiation between acceleration between initial and terminal velocities.

Now...please someone check my math
Math is wrong..... but you have to find out where!
[/quote]

probably some damned conversion

Ah...1.1839^-3 isn't .7xxx it's .6026358148...damned microsoft calculators! Trusty Ti-83 works great though

p = 4.3486
CdA = http://en.wikipedia.org/wiki/Automob...ag_coefficient I was totally off Let's just call it 6.0 ft ^2
Vt = sqroot(((2*2850)*32.174)/(6*4.3486)) = 83.84 fps = 57.16 mph

1320ft / 57.16 mph = 15.744 seconds @ 57.16 mph...yep we do better under the power of the F2xC
Old May 25, 2011 | 06:03 PM
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You guys are too smart for me
Old May 25, 2011 | 06:15 PM
  #1677  
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I just plug numbers into formulas...I really have no freakin clue what Im talking about...sadly no bourbon to aid in my mathematical understanding.
Old May 25, 2011 | 06:31 PM
  #1678  
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Originally Posted by FluKy15
You guys are too smart for me
Old May 25, 2011 | 07:02 PM
  #1679  
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Old May 25, 2011 | 07:42 PM
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