HOT: Active* forum members generally gain 5% discount at starbike.com store!
Weight Weenies
* FAQ    * Search    * Trending Topics
* Login   * Register
HOME Listings Articles FAQ Contact About




Post new topic Reply to topic  [ 98 posts ] 
Go to page Previous  1 ... 3, 4, 5, 6, 7  Next
Author Message
PostPosted: Fri Jul 26, 2013 10:11 pm 
Offline

Joined: Sat Oct 23, 2010 9:36 am
Posts: 176
Location: Eastern Coast of the Baltic Sea
Here's mine from last Wednesday.
http://connect.garmin.com/activity/348646682" onclick="window.open(this.href);return false;

Not exactly a true TT, but a bike leg from a "backyard" triathlon (0.6km swim + 28km bike + 7km run) race instead. 2nd best bike split of the day :D

So standard helmet (Catlike Whisper Size L), no shoe covers, no rear disc (Zipp 808's F & R). Also, the distance has 1.5 km of cobbles + non-tarmac roads on start / end, real fun to ride it on a TT bike :D :D


Top
 Profile  
 
PostPosted: Sat Jul 27, 2013 2:29 pm 
Offline
Administrator
User avatar

Joined: Sat Jun 19, 2004 11:08 am
Posts: 6222
Location: Urbana, Illinois
@ Tapeworm. I need to post them up but am current on vacation and traveling without computer. I do know my average watts were 261 so I guess the couple of changes I made in my position improved my drag numbers.

I will post up when I return home.

_________________
-For my next trick I will set myself on fire!
-This board and the world in general would be a much nicer place if everyone could just take themselves a little less seriously.
-Sticky Fingers John Rockefeller
-First one over the cliff wins!


Top
 Profile  
 
Posted: Sat Jul 27, 2013 2:29 pm 


Top
  
 
PostPosted: Mon Jul 29, 2013 10:07 am 
Offline
User avatar

Joined: Wed Nov 09, 2011 12:19 pm
Posts: 31
Location: Switzerland
Not a typical TT Race.. but the closest to what I've done since getting a powermeter (quark elsa) -> http://connect.garmin.com/activity/350065058. A little bit of a fast start, but otherwise happy with the performance. Still need some more work on on the power-to-weight ratio.. hints for climbing specific training sessions are welcome ;)

_________________
Supersix HiMod, Supersix EVO HiMod, CaadX, Lynskey R330, Lynskey Pro29, Yelli Screamy 29


Top
 Profile  
 
PostPosted: Sat Aug 03, 2013 1:39 am 
Offline
Administrator
User avatar

Joined: Sat Jun 19, 2004 11:08 am
Posts: 6222
Location: Urbana, Illinois
Tapeworm
I finally uploaded it to Garmin Connect.

http://connect.garmin.com/activity/352368337

_________________
-For my next trick I will set myself on fire!
-This board and the world in general would be a much nicer place if everyone could just take themselves a little less seriously.
-Sticky Fingers John Rockefeller
-First one over the cliff wins!


Top
 Profile  
 
PostPosted: Sat Aug 03, 2013 2:27 am 
Offline
User avatar

Joined: Thu May 03, 2007 10:39 am
Posts: 2342
Looks like a damn finely executed TT, slight decay in the 3/4 and then picked up again, which interestingly was done with a lower cadence.

Well done!

_________________
"Physiology is all just propaganda and lies... all waiting to be disproven by the next study."
"I'm not a real doctor; But I am a real worm; I am an actual worm." - TMBG


Top
 Profile  
 
PostPosted: Sat Aug 03, 2013 12:37 pm 
Offline
Administrator
User avatar

Joined: Sat Jun 19, 2004 11:08 am
Posts: 6222
Location: Urbana, Illinois
Thank you. The decay occurs where you see the road curves north for about a mile. The wind was blowing pretty hard so the course went cross wind most of the race. I was 3/4's of the way into the race and then had to fight a strong headwind. Recovered and then dug deep to finish.

We are hosting our state championship time trials on this course August 31, 2013.

_________________
-For my next trick I will set myself on fire!
-This board and the world in general would be a much nicer place if everyone could just take themselves a little less seriously.
-Sticky Fingers John Rockefeller
-First one over the cliff wins!


Top
 Profile  
 
PostPosted: Sun Aug 04, 2013 4:45 pm 
Offline
User avatar

Joined: Fri Jul 10, 2009 7:22 pm
Posts: 864
Location: London
Couple of races from the last month. Both rides done on the road bike with clip-ons.

Haven't done much racing this year (2nd child just turned 1), but I've managed to get a couple of TTs in over the last month.

Club 10 - http://connect.garmin.com/activity/353280009
- 22:52 / 338W
- 2nd Best 20min power.
- Round rings.

Open 25 - http://connect.garmin.com/activity/353238835
- 57:36 / 312W
- Struggled with a knot in my left calf cramping up, so reasanably happy with that.
- Doval rings
- Winner today was Dr Hutch with a long 49

Photo from the Open 25 today.

Image

_________________
Snacking on carrot sticks - Where did it all go so wrong?
-
Finsbury Park CC


Last edited by MattSoutherden on Mon Aug 05, 2013 2:58 pm, edited 1 time in total.

Top
 Profile  
 
PostPosted: Mon Aug 05, 2013 10:10 am 
Offline
Administrator
User avatar

Joined: Sat Jun 19, 2004 11:08 am
Posts: 6222
Location: Urbana, Illinois
Matt, well done. Your numbers look very consistent in your 25 mile run. I think you would do well with a dedicated time trial bike and equipment.

_________________
-For my next trick I will set myself on fire!
-This board and the world in general would be a much nicer place if everyone could just take themselves a little less seriously.
-Sticky Fingers John Rockefeller
-First one over the cliff wins!


Top
 Profile  
 
PostPosted: Mon Aug 05, 2013 3:07 pm 
Offline
User avatar

Joined: Fri Jul 10, 2009 7:22 pm
Posts: 864
Location: London
Thanks.

That course doesn't undulate much, so pacing isn't too difficult.

I've put my last 3 TTs with that setup into the Chung calculator on the Cycling Power Lab site (with observed weather from record) and they came out at 0.285/0.286 CdA. Their CdA estimator for someone my height/weight on an optimised TT setup is 0.245. If I could get to .25 that would knock over 2 minutes off my time at the same power.

_________________
Snacking on carrot sticks - Where did it all go so wrong?
-
Finsbury Park CC


Top
 Profile  
 
PostPosted: Mon Aug 05, 2013 5:17 pm 
Offline
in the industry
User avatar

Joined: Sun Jul 29, 2012 2:59 pm
Posts: 634
Location: Ruidoso, NM
Do those calculators assume no wind?

Being tall is definitely a disadvantage, but guys like Wiggins for instance can still get very aero. He's probably ~.20. I think you might have a lot of gains to make via position.

_________________
formerly rruff...


Top
 Profile  
 
PostPosted: Mon Aug 05, 2013 8:00 pm 
Offline
User avatar

Joined: Fri Jul 10, 2009 7:22 pm
Posts: 864
Location: London
It assumes that the course is a loop and that the conditions are constant over the duration.

Their estimate for Wiggo is ~0.24. I don't think anyone in a UCI position is going to get right down to ~0.2. Some of the mid 90s superman and Obree positions would be ~0.18, though.

_________________
Snacking on carrot sticks - Where did it all go so wrong?
-
Finsbury Park CC


Top
 Profile  
 
PostPosted: Mon Aug 05, 2013 10:37 pm 
Offline
in the industry
User avatar

Joined: Sun Jul 29, 2012 2:59 pm
Posts: 634
Location: Ruidoso, NM
I just took another look at it. They don't account for wind, so if there is wind it can skew the results quite a bit.

I made this awhile ago to get CdA if wind is a factor. http://forum.slowtwitch.com/gforum.cgi? ... ply;so=ASC

Seems to work well. At least the 4 times I've used it it's been very consistent.

And if Wiggins has a .24 CdA... well, I just don't believe it. Remember, he is right around the best in the world in a flat TT and he doesn't weigh much. If he can put out enough power to push a .24 CdA that fast, then he'd be way ahead in the climbs. Froome for instance must have quite a bit higher CdA.

I'm not quite as tall as him but considerably fatter, and my CdA is .225 with old equipment. Pretty sure I could hit .21 or even .20 with the latest and best stuff.

_________________
formerly rruff...


Top
 Profile  
 
PostPosted: Mon Aug 05, 2013 11:16 pm 
Offline
User avatar

Joined: Fri Jul 10, 2009 7:22 pm
Posts: 864
Location: London
Ok. Cool, thanks. Have downloaded the xls, will try it out. :)

_________________
Snacking on carrot sticks - Where did it all go so wrong?
-
Finsbury Park CC


Top
 Profile  
 
PostPosted: Tue Aug 06, 2013 12:28 am 
Offline
User avatar

Joined: Thu May 03, 2007 10:39 am
Posts: 2342
Have a read of Alex's blog below, the rider he coached was sub 0.2.

http://alex-cycle.blogspot.com.au/2009/ ... r.html?m=1

I will have a look at the xls above as well as I figure I must be around 0.22 or so given my decent speed with crappy power ;)

_________________
"Physiology is all just propaganda and lies... all waiting to be disproven by the next study."
"I'm not a real doctor; But I am a real worm; I am an actual worm." - TMBG


Top
 Profile  
 
PostPosted: Wed Aug 07, 2013 3:06 am 
Offline
in the industry
User avatar

Joined: Sun Jul 29, 2012 2:59 pm
Posts: 634
Location: Ruidoso, NM
Please let me know if you have questions. One thing I'd like to add is that now that I included entrance and exit speeds, you use a shorter segment and do more "laps" if that suits you better. Mine have been ~.5 miles.

Sorry it's in absurd US units for people who live elsewhere. If you want, I don't think it would be hard to edit it.

I know of a few normal sized amateur riders on road TT bikes who are under .20 for CdA. Most people who are serious about optimizing their speed and are not too large can get under .23. We have an advantage over some pros actually because we can use any equipment we wish... but then there are the $$$ required...

_________________
formerly rruff...


Top
 Profile  
 
Posted: Wed Aug 07, 2013 3:06 am 


Top
  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 98 posts ] 
Go to page Previous  1 ... 3, 4, 5, 6, 7  Next


Who is online

Users browsing this forum: No registered users and 2 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  

   Similar Topics   Author   Replies   Views   Last post 
There are no new unread posts for this topic. Power meter issues + MTB power meter on a roadbike

in Road

AlexJ

3

578

Tue Nov 12, 2013 2:09 pm

Geoff View the latest post

There are no new unread posts for this topic. Quarq power meter

in For sale - Pictures are mandatory 22-3-13

Jersland

0

229

Mon Jun 16, 2014 3:58 pm

Jersland View the latest post

There are no new unread posts for this topic. New group set, new power meter?

in Road

naylor343

5

958

Wed Jul 16, 2014 9:57 pm

dunbar42 View the latest post

There are no new unread posts for this topic. SRM power meter question

in Road

Iamspecialized

2

237

Tue Jul 29, 2014 9:28 pm

Danza View the latest post

There are no new unread posts for this topic. Power meter weight penalties

[ Go to page: 1, 2 ]

in Road

ITTY

28

1820

Sat Jul 26, 2014 11:37 am

rijndael View the latest post


It is currently Wed Sep 17, 2014 11:35 pm

All times are UTC + 1 hour




Advertising   –  FAQ   –  Contact   –  Convert   –  About

© Weight Weenies 2000-2013
hosted by starbike.com


How to get rid of these ads? Just register!


Powered by phpBB