Track altitude
Submitted by tgallagher on Tue, 2010-06-08 23:46
So Lee Childers and I stayed after sprint night tonight to survey the track and figure out what the difference in height is from turns 1-2 to 3-4.
While we process the data, I thought it would be interesting to see what everybody out there thought. So, vote away and we'll post the correct answer in a bit!
http://www.dicklanevelodrome.com/node/574
Tim
42"
just a guess
did you use an optical level? laser?
So, the results are in and
So, the results are in and only 1 person voted correctly (although, when the poll auto-closed it deleted the vote counts, I don't know what that's about).
The answer is at least 42". I say at least because we did a visual inspection with the laser to find the high and low point and got a 42" difference, but it's possible we under-predict it slightly because we didn't find the true high and low. But, it's certainly not much more than 42".
We used a laser and measured the height the laser intersected a vertical stick at the black line.
We still have to collect the inclination of the track at each altitude measurement location for the next set of data, but now you know!
Tim
Wow. I can attest that it's
Wow.
I can attest that it's about a 150W difference when maintaining the same warmup pace on the front straight vs the back straight.
For me, it's:
50-75W down the back straight
200-225W down the front straight
My garmin puts it at 4' -
My garmin puts it at 4' - give or take... which is what Pete always said. 42" vs 48" over the span of the infield is enough to split the arse hairs on an elephant if the wind is blowing from the east!
Below is a link to a graph on
Below is a link to a graph on the elevation change over one lap of the velodrome. Remember to look at the scale before you freak out over the shape. Yes, the scale is in meters not inches.
http://yfrog.com/3zelevationchangeduringonp
More trivia,
The uphill grade is about 0.8% where as the downhill grade is about 0.6%
Lee