Quote:
Originally Posted by humfrz
Well, DANG, there, paulca, I reckon one would have to make some estimates to plug into the formula.
The published COD for a 2013 FR-S is 0.27.
The frontal area could be estimated (just take a look see at it from the front. OR, someone who has a CAD program could calculate it.
So, are you gonna do the math or not ...... ??
I would, but it's my nap time .....  |
For what it's worth, I plugged in some numbers. The equation is not that scary. However it's a bit basic and does include anything for rolling resistance etc. which while small would shave a few percent off.
power=147000 (fly wheel watts)
aird=1.3
area=2.28 (sq m)
cod=0.27
x = (2*power) / (aird * cod * area )
v = e(l(x)/3) (this is a cube root)
v * 2.23694 (m/s to mph)
160.20993999770118933534
The frontal area is a guess from the total width and total height on the spec.
147,000 watts = 197 bhp.
When we modify that to "wheel hp" from a bit of googling we get:
power=117000 (157 wheel hp)
x = (2*power) / (aird * cod * area )
v = e(l(x)/3)
v * 2.23694
148.47236739928096565100