tag:blogger.com,1999:blog-35788819.post6255377880256883531..comments2023-10-12T00:18:31.629+11:00Comments on Alex's Cycle Blog: Form = Fitness + Freshness: Take 2Alex Simmonshttp://www.blogger.com/profile/00698332397074026424noreply@blogger.comBlogger3125tag:blogger.com,1999:blog-35788819.post-26298861727142212702011-02-27T18:59:02.373+11:002011-02-27T18:59:02.373+11:00Hi Oliver
No problem with your English!
The osci...Hi Oliver<br /><br />No problem with your English!<br /><br />The oscillating speed and cadence trace is normal when riding the track.<br /><br />The power meter measures wheel speed and cadence (which of course are directly linked to each other since it's a fixed gear bike).<br /><br />The apparent oscillation is due to the variance in measured wheel speed as you move from riding the straights to the bends and back again. Two things are going on:<br /><br />1. In the straights, the wheels are in line with your centre of mass, so both are moving at the same speed. In the turns however, the wheels trace a wider radius than the centre of mass, and so there is an apparent increase in speed as measured at the wheel compared to the speed of the centre of mass (which is what is conserved).<br /><br />2. A second order factor is that when you transition from the straights into the bends, you begin to lean over, lowering your overall centre of mass when in the turns. That reduction in potential energy (i.e. height) is converted to an equivalent increase in kinetic energy (i.e.speed).<br /><br />Of course, as you exit the bend and return to the straight, then the opposite occurs and wheel speed/cadence reduces.<br /><br />Hence as you go round the track, the speed as measured by the wheel moves up and down, even though you are keeping everything as smooth as possible.<br /><br />Experienced track riders get used to the variance in cadence and learn to not let it "get away from them" as they make the transitions.Alex Simmonshttps://www.blogger.com/profile/00698332397074026424noreply@blogger.comtag:blogger.com,1999:blog-35788819.post-81852742015548803902011-02-06T21:51:54.450+11:002011-02-06T21:51:54.450+11:00Hello Alex,
First, sorry about my english if ther...Hello Alex,<br /><br />First, sorry about my english if there is some mistake ... <br /><br />I'm looking about the shape of the cadence and i don't understand the reason of the oscillation ?<br />Is it normal and specific on a track (slow cadence in the curve) ?<br /><br />Olivier (addict of your blog)Olivier ROMEYERhttps://www.blogger.com/profile/04239194455110405254noreply@blogger.comtag:blogger.com,1999:blog-35788819.post-92072174737596614932011-02-06T20:15:15.623+11:002011-02-06T20:15:15.623+11:00Awesome stuff dude. I'm so stoked for you! Kee...Awesome stuff dude. I'm so stoked for you! Keep rocking on!! :-DLawrencehttps://www.blogger.com/profile/08758656991029222932noreply@blogger.com