Quote:
Originally Posted by paulca
Do we even have the information we need? Exact frontal area, exact average co-efficient of drag?
My point was to get across that small increases in speed require lots of power increase. So claims of cars going 23 mph faster than the stated manufacturer number (137mph I believe, from memory) are highly unlikely.
Also that speedo readings are also highly unreliable.
GPS for that matter isn't much better. It greatly depends on the GPS used, it's accuracy and refresh rate and any equations used to smooth the usually jumpy data. Also depends on how straight and level the road is.
A proper calibrated laser or radar reading or a track day timing beam speed trap I might put more value in.
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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 .....
humfrz