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Re: I got my ass beat by Joaquin riding his Powercranks up La Morcuera with a Powertap [joaco21]
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Re: I got my ass beat by Joaquin riding his Powercranks up La Morcuera with a Powertap [RChung]
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Would any of you that got the Power file from Joaquin care to post your assessment of it? Joaquin has yet to forward the data to me so I can't post the graphs for everyone to see. The fact that everyone is so silent, I suppose, means the files support what he said? Probably the reason this thread came to a sudden stop.
And, how does one calculate elevation gain from a power file?
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Frank,
An original Ironman and the Inventor of PowerCranks
And, how does one calculate elevation gain from a power file?
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Frank,
An original Ironman and the Inventor of PowerCranks
Re: I got my ass beat by Joaquin riding his Powercranks up La Morcuera with a Powertap [Frank Day]
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"The fact that everyone is so silent, I suppose, means the files support what he said? Probably the reason this thread came to a sudden stop"
Could be. Or maybe people haven't gotten the file? Or maybe the others realize you won't listen to them anyway?
"And, how does one calculate elevation gain from a power file"
An altimeter?
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"Lemond is cycling's version of Rev Jessie Jackson." -johnnyperu 5/18/07
"Just because I suck doesn't mean my bike has to" -rickn 9/2/08
Could be. Or maybe people haven't gotten the file? Or maybe the others realize you won't listen to them anyway?
"And, how does one calculate elevation gain from a power file"
An altimeter?
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"Lemond is cycling's version of Rev Jessie Jackson." -johnnyperu 5/18/07
"Just because I suck doesn't mean my bike has to" -rickn 9/2/08
Re: I got my ass beat by Joaquin riding his Powercranks up La Morcuera with a Powertap [brandonecpt]
[ In reply to ]
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Frank,
An original Ironman and the Inventor of PowerCranks
Re: I got my ass beat by Joaquin riding his Powercranks up La Morcuera with a Powertap [Frank Day]
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No idea, that's why I was asking.
If someone had a GPS and their power file, they could get the elevation from the GPS. Not sure how to get those two to overlap in one graph though.
That's one of the cool things about the Quark system, it has GPS and altitude. Not that I can afford it...
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"Lemond is cycling's version of Rev Jessie Jackson." -johnnyperu 5/18/07
"Just because I suck doesn't mean my bike has to" -rickn 9/2/08
If someone had a GPS and their power file, they could get the elevation from the GPS. Not sure how to get those two to overlap in one graph though.
That's one of the cool things about the Quark system, it has GPS and altitude. Not that I can afford it...
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"Lemond is cycling's version of Rev Jessie Jackson." -johnnyperu 5/18/07
"Just because I suck doesn't mean my bike has to" -rickn 9/2/08
Re: I got my ass beat by Joaquin riding his Powercranks up La Morcuera with a Powertap [brandonecpt]
[ In reply to ]
Frank
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Frank,
An original Ironman and the Inventor of PowerCranks
Re: I got my ass beat by Joaquin riding his Powercranks up La Morcuera with a Powertap [Frank Day]
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No, your supposition is incorrect--at least, as it applies to me. I've been silent because I haven't yet received the file (and, in general, it's good form not to announce your assessment of a file before you've seen it). However, I seem to recall that Joaquin travels quite a bit so perhaps he's on the road and simply hasn't had the opportunity to send it. I'm sure that once he gets a few minutes he'll send it on.
Re: I got my ass beat by Joaquin riding his Powercranks up La Morcuera with a Powertap [Frank Day]
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Ummm...my guess for why it's come to a sudden stop is that no power file has been produced. I sent Joaquin a request both by PM and email and haven't heard a peep. I also know that as of this morning, Mr. Chung hasn't gotten one either. Obviously, the file exists since he posted a plot from downloading it. Now, I understand that Joaquin travels on business at times, so we should probably cut him just a little slack...
As for you second question, that's easy. Mr. Chung figured that out years ago:
http://anonymous.coward.free.fr/...meter/altimeter.html
It's also the basis (i.e. "virtual elevation") for his clever method of field testing CdA:
http://anonymous.coward.free.fr/...cda/indirect-cda.pdf
http://bikeblather.blogspot.com/
Re: I got my ass beat by Joaquin riding his Powercranks up La Morcuera with a Powertap [Frank Day]
[ In reply to ]
Re: I got my ass beat by Joaquin riding his Powercranks up La Morcuera with a Powertap [RChung]
[ In reply to ]
Can you comment on how one calculates altitude from a power file?
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Frank,
An original Ironman and the Inventor of PowerCranks
Re: I got my ass beat by Joaquin riding his Powercranks up La Morcuera with a Powertap [RChung]
[ In reply to ]
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Frank,
An original Ironman and the Inventor of PowerCranks
Re: I got my ass beat by Joaquin riding his Powercranks up La Morcuera with a Powertap [Frank Day]
[ In reply to ]
Yep...it'll be interesting how close it comes to this:
BTW, using the masses that Joaquin supplied, if his time is taken from the start of the 2nd km, I calculate that he actually was putting out somewhere in the range of 310-320W for the ~7% average grade.
I still would like to know if he's ever tested the static torque values from his PT hub...
http://bikeblather.blogspot.com/
Re: I got my ass beat by Joaquin riding his Powercranks up La Morcuera with a Powertap [Tom A.]
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On a side note, I wish I had something like that to climb around Chicago. I can't fully get a grip on how rough a climb like that might be.
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"Lemond is cycling's version of Rev Jessie Jackson." -johnnyperu 5/18/07
"Just because I suck doesn't mean my bike has to" -rickn 9/2/08
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"Lemond is cycling's version of Rev Jessie Jackson." -johnnyperu 5/18/07
"Just because I suck doesn't mean my bike has to" -rickn 9/2/08
Re: I got my ass beat by Joaquin riding his Powercranks up La Morcuera with a Powertap [brandonecpt]
[ In reply to ]
It's just like spending 30 minutes groveling into a stiff headwind :-)
http://bikeblather.blogspot.com/
Re: I got my ass beat by Joaquin riding his Powercranks up La Morcuera with a Powertap [Tom A.]
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I don't understand why he posted the MMPS for the power profile.
"Non est ad astra mollis e terris via." - Seneca | rappstar.com | FB - Rappstar Racing | IG - @jordanrapp
"Non est ad astra mollis e terris via." - Seneca | rappstar.com | FB - Rappstar Racing | IG - @jordanrapp
Re: I got my ass beat by Joaquin riding his Powercranks up La Morcuera with a Powertap [Tom A.]
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Crap, I do that daily on my commute home on the lake. It's not fun.
Either way, anyone received the power file yet? I'm curious on what the smarter-than-I guys have to say about it.
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"Lemond is cycling's version of Rev Jessie Jackson." -johnnyperu 5/18/07
"Just because I suck doesn't mean my bike has to" -rickn 9/2/08
Either way, anyone received the power file yet? I'm curious on what the smarter-than-I guys have to say about it.
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"Lemond is cycling's version of Rev Jessie Jackson." -johnnyperu 5/18/07
"Just because I suck doesn't mean my bike has to" -rickn 9/2/08
Re: I got my ass beat by Joaquin riding his Powercranks up La Morcuera with a Powertap [brandonecpt]
[ In reply to ]
I received a PM from Joaquin this morning stating that he was in Athens on business and would return to Madrid this afternoon. He would send the file when he returned.
http://bikeblather.blogspot.com/
Re: I got my ass beat by Joaquin riding his Powercranks up La Morcuera with a Powertap [Tom A.]
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Re: I got my ass beat by Joaquin riding his Powercranks up La Morcuera with a Powertap [brandonecpt]
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Me too.
Re: I got my ass beat by Joaquin riding his Powercranks up La Morcuera with a Powertap [RChung]
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Re: I got my ass beat by Joaquin riding his Powercranks up La Morcuera with a Powertap [Tom A.]
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Re: I got my ass beat by Joaquin riding his Powercranks up La Morcuera with a Powertap [Tom A.]
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Did ya get the file?
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"Lemond is cycling's version of Rev Jessie Jackson." -johnnyperu 5/18/07
"Just because I suck doesn't mean my bike has to" -rickn 9/2/08
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"Lemond is cycling's version of Rev Jessie Jackson." -johnnyperu 5/18/07
"Just because I suck doesn't mean my bike has to" -rickn 9/2/08
Re: I got my ass beat by Joaquin riding his Powercranks up La Morcuera with a Powertap [brandonecpt]
[ In reply to ]
Re: I got my ass beat by Joaquin riding his Powercranks up La Morcuera with a Powertap [Tom A.]
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Wasn't it, "patience, you must have"?
Regardless, I am sorely lacking.
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"Lemond is cycling's version of Rev Jessie Jackson." -johnnyperu 5/18/07
"Just because I suck doesn't mean my bike has to" -rickn 9/2/08
Regardless, I am sorely lacking.
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"Lemond is cycling's version of Rev Jessie Jackson." -johnnyperu 5/18/07
"Just because I suck doesn't mean my bike has to" -rickn 9/2/08
Re: I got my ass beat by Joaquin riding his Powercranks up La Morcuera with a Powertap [Rappstar]
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Either way, using time/watts does provide a sanity check, but it isn't accurate enough to judge whether someone's PT is out of calibration. Another SIGNIFICANT assumption is that the power is doled out in a similar manner. Here's a quick experiment you can do with analytic cycling to show why this is important:
10% grade at 350W = 4.4m/s
10% grade at 300W = 3.81m/s
5% grade at 350W = 7.31m/s
5% grade at 300W = 6.5m/s
If you ride 1km at 10% and 1km at 5% grades, choose to ride one at 350W and the other at 300W...you get a combined climb of:
10% at 350W = 227.3s, 5% at 300W = 153.8s, total time 381.1sec, avg power 329.8W
10% at 300W = 262.5s, 5% at 350W = 136.8s, total time 399.3sec, avg power 317.1W
Why is this important you might ask? Because the time/power ratio is different! In the first case it is 1.155s/avgW, in the second case it is 1.26s/avgW. Based on Joaquin's posted pic he has enough variability that it could matter. Not by the 10% in the above simple case, but certainly 30 secs to a minute difference.
On a side note....holy @#%!#$%@#$ hell bikedoc! 460W for 20 minutes! Ouch! That puts my measly 330W to serious shame. I hope you weigh 250lb or I'm going to be really jealous!