Well I've just got to ask...
Does crank position have any significant effect on aero drag?
If so, what's the best position when coasting in a straight line at high speed? 12 O'clock / 6 O'clock, or 9 and 3?
Crank Aero Position?
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Crank Aero Position?
Postby Downhill » Sun Apr 22, 2012 10:44 pm
Today's effort = Tomorrows reward.
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Re: Crank Aero Position?
Postby Alex Simmons/RST » Mon Apr 23, 2012 9:50 am
Do some virtual elevation analysis of coast down tests and you could work it out. Need a good high frequency accurate speed logger (speed every second is just enough, provided speed data is measured to nearest 0.2km/h) and a calm day. And a hill with a flat top approach, downhill section and a flat run off area at bottom is ideal.
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Re: Crank Aero Position?
Postby brentono » Mon Apr 23, 2012 10:08 am
To take a logical approach, and from much observation and a lot of personal experience,
it would have to be 9 and 3!
Cheers
it would have to be 9 and 3!
Cheers
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Re: Crank Aero Position?
Postby DavidI » Tue Apr 24, 2012 8:53 am
My recollection of various magazine articles based on wind tunnel testing is that the best position is, as stated, 9 & 3.
As to whether it has a "significant" effect... well, that depends on what you consider "significant."
As to whether it has a "significant" effect... well, that depends on what you consider "significant."
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Re: Crank Aero Position?
Postby foo on patrol » Wed Apr 25, 2012 8:33 am
Keep pedalling softy! Yep 9/3.
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Re: Crank Aero Position?
Postby Downhill » Wed Apr 25, 2012 12:56 pm
But I've run out of gears!!!foo on patrol wrote:Keep pedalling softy! Yep 9/3.
Foo
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Re: Crank Aero Position?
Postby foo on patrol » Wed Apr 25, 2012 3:10 pm
Well try harder!
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Re: Crank Aero Position?
Postby hannos » Thu Apr 26, 2012 4:04 pm
JV911 wrote:most of the pros seem to coast at 9 and 3
well they're wrong!
It's 3 and 9!
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Re: Crank Aero Position?
Postby foo on patrol » Sat Apr 28, 2012 5:43 pm
^^ Idiot! ^^
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Re: Crank Aero Position?
Postby Downhill » Sat Apr 28, 2012 8:39 pm
... but only if you're left handed!hannos wrote:JV911 wrote:most of the pros seem to coast at 9 and 3
well they're wrong!
It's 3 and 9!
Today's effort = Tomorrows reward.
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