John or Boyd or Travis (or anyone else who cares comment)
Wireless Gen III set up.
Last night we had a hard race training session. The first 29 minutes are riding out to the local crit circuit and an easy warm up. Then the next 56 minutes are a hard effort - group of about 18 going through and off, and occasional attacks from the back of the group. Last night was a still night, minimum breeze.
My heartrate tells it like it was, my max is 186 bpm and there were chunks of time when it was right up there.
Now I know the effects of drafting etc, I had a jump off the front when my power jumps up to close to 700 (it was more a steady increase than a big jump).
I was a bit surprised how low the wattage for the hour session was - 178 watts, normalized at 207.
Now my FTP is 280 and my perception was that we were riding at that kind of intensity, average speed was just under 26mph for the hour.
Any comments or thoughts?
Hard Group ride- File for comment
Hard Group ride- File for comment
- Attachments
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- iBike_04_01_2009_1830_37_Miles.csv
- (1.28 MiB) Downloaded 306 times
Re: Hard Group ride- File for comment
The first thing I noticed is your wind scaling is 1.000 for the profile. This would be practically impossible to achieve, and so I am thinking your wind scaling is too high. This will make your cda too low (assuming your wind scaling is actually less than 1.0, common for stem mounts).
Do you have a solo ride file, or is there another profile that has the wind scaling at a number other than 1.0
Do you have a solo ride file, or is there another profile that has the wind scaling at a number other than 1.0
Boyd Johnson
http://www.boydcycling.com - high performance carbon wheels and accessories
http://www.boydcycling.com - high performance carbon wheels and accessories
Re: Hard Group ride- File for comment
And as soon as I posted I found a profile that I had made for you from before with a wind scaling of .782
When I switched to this profile afterwards I get an average wattage of 210 starting at mile 11.4 where the speed and HR jumped up, all the way to the end of the group ride (where your heart rate really decreased). This is much more in line with what I would expect from sitting in a group ride that averages 27 mph on flat roads.
*edit*
Figured I would just edit this. I keep on finding new things with this file. I think your wind scaling could be above a 1, but I think your aero number is too low. I want to wait to see a solo ride file before I try too much more stuff, but I think I have found some numbers that work for you.
When I switched to this profile afterwards I get an average wattage of 210 starting at mile 11.4 where the speed and HR jumped up, all the way to the end of the group ride (where your heart rate really decreased). This is much more in line with what I would expect from sitting in a group ride that averages 27 mph on flat roads.
*edit*
Figured I would just edit this. I keep on finding new things with this file. I think your wind scaling could be above a 1, but I think your aero number is too low. I want to wait to see a solo ride file before I try too much more stuff, but I think I have found some numbers that work for you.
Boyd Johnson
http://www.boydcycling.com - high performance carbon wheels and accessories
http://www.boydcycling.com - high performance carbon wheels and accessories
Re: Hard Group ride- File for comment
Boyd, thanks - this ride was on my race bike (the profile you sorted last time was on my training bike) .
the numbers are the result of a series of coastdowns and a new 4 mile set up on the race bike.
I will post a solo ride later, I was worried that when I was recently in France i suffered some extreme weather at altitude with sleet, heavy rain and 35deg temp. This led to the next day when I was setting up the wind offset could swing between -85mph and +85mph and not settle near 0, and a a heavy condensation under the screen.
This problem cleared after a while, but wondered if something has gone wrong. The wind offset does now 0 properly when I set up.
The profile on the ibike for that group ride is the one achieved from the specific calibration session I did on this bike.
I'll post a couple of solo's later, one from today's commute into work and one from a longer ride in the French mountains a couple of weeks back.
the numbers are the result of a series of coastdowns and a new 4 mile set up on the race bike.
I will post a solo ride later, I was worried that when I was recently in France i suffered some extreme weather at altitude with sleet, heavy rain and 35deg temp. This led to the next day when I was setting up the wind offset could swing between -85mph and +85mph and not settle near 0, and a a heavy condensation under the screen.
This problem cleared after a while, but wondered if something has gone wrong. The wind offset does now 0 properly when I set up.
The profile on the ibike for that group ride is the one achieved from the specific calibration session I did on this bike.
I'll post a couple of solo's later, one from today's commute into work and one from a longer ride in the French mountains a couple of weeks back.
Re: Hard Group ride- File for comment
Boyd or anyone else who fancies a comment:
Here are another couple of ride files, 1 a longer ride in France which included a couple of threshold type efforts on the hills and a short ride from my ride home from work last night.
Here are another couple of ride files, 1 a longer ride in France which included a couple of threshold type efforts on the hills and a short ride from my ride home from work last night.
- Attachments
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- iBike_04_03_2009_1610_8_Miles.csv
- (354.01 KiB) Downloaded 287 times
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- iBike_03_22_2009_1003_63_Miles.csv
- (3.13 MiB) Downloaded 294 times
Re: Hard Group ride- File for comment
@coachboyd: I'm confused about your comment of not having a wind scaling factor greater than 1.0. While it isn't probably appropriate for this tread, in a different thread John had indicated that a wind scaling factor of 2.0 was within reason. Help me understand. The reason I ask is that with my Gen3, I've been getting wind scaling factors of between 1.07 (cross wind) and 1.24 (head/tail wind) on a road bike with a stem mount. John's post I'm referring to is here: http://www.ibikeforum.com/viewtopic.php ... 766&p=4473
Re: Hard Group ride- File for comment
I'm going to jump in here. I think what Boyd is just saying it's very unusual to have EXACTLY a 1.0 wind scaling factor. Sure you could have that but it's very unusual. Depending on the individual unit and the placement of a unit you can have anywhere from .750 all the way up to 2.750. Needless to say most units fall underneath a bell of .9 to about 1.3. However falling outside of that range is not unusual or detrimental. A good set of CDs and a good cal ride will still yield the correct CdA and Crr results.gregh3285 wrote:@coachboyd: I'm confused about your comment of not having a wind scaling factor greater than 1.0. While it isn't probably appropriate for this tread, in a different thread John had indicated that a wind scaling factor of 2.0 was within reason. Help me understand. The reason I ask is that with my Gen3, I've been getting wind scaling factors of between 1.07 (cross wind) and 1.24 (head/tail wind) on a road bike with a stem mount. John's post I'm referring to is here: http://www.ibikeforum.com/viewtopic.php ... 766&p=4473
Fernando
Re: Hard Group ride- File for comment
Boyd,
I raced on Sunday - was a 63 mile race run off on a slightly undualting course of 7 * 9 mile laps.
It was my first bunch race of the season (done a couple of TT's last month) and the race was run off at around 24mph average speed. I did not venture out of the bunch at all and sat in the whole race. Average power output was only 161 watts.
I am wondering if I should re-do my set up, I know lurking in the bunch will mean less power required than riding in the break, but as comparison what kind of value would you see for 2 1/2 hours in a bunch (I don't normally sit in the bunch all race, and do actually attack, but first race of the season I just wanted to re-acquaint myself).
Normalized power was 218 watts.
I raced on Sunday - was a 63 mile race run off on a slightly undualting course of 7 * 9 mile laps.
It was my first bunch race of the season (done a couple of TT's last month) and the race was run off at around 24mph average speed. I did not venture out of the bunch at all and sat in the whole race. Average power output was only 161 watts.
I am wondering if I should re-do my set up, I know lurking in the bunch will mean less power required than riding in the break, but as comparison what kind of value would you see for 2 1/2 hours in a bunch (I don't normally sit in the bunch all race, and do actually attack, but first race of the season I just wanted to re-acquaint myself).
Normalized power was 218 watts.