PP V3 - frst calibration

[kdx200]

Hi John...

finally my trade V3 is here!! The design is more aerospatial than my old v1!!! ahhaha

i did the OB and then ride for 3 hours.

I think theres is an overestimation. Perhaps in some conditions with headwind i think it was ok and with tailwind perhaps some overrated.

Now i think i must setup my body and bike in the Isaac?.

Please check my files.

also i thought that there was no more OB file.... i found it in the v3.

Iam 175cmts 70kilos. TT bike.

thank you very much.

iBike_11_02_2019_0656_2_km_CalRide.ibr

(42.57 KiB) Downloaded 162 times

iBike_11_02_2019_0702_87_km_HiDef.ibr

(1.77 MiB) Downloaded 161 times

[Velocomp]

If you're riding a TT bike in TT position, your CdA is too high. This would cause high watts.

I corrected your ride file for a rider your size and weight, riding in TT position.

Corrected ride file and profile attached.

[kdx200]

Thank you John.

The CDA is the only field corrected?

[Velocomp]

Thank you John.

The CDA is the only field corrected?

Yes, that is the only thing that was changed.

[kdx200]

John,

i set the correct values for my body and bike and the did a long ride.

My feelings says that thw watts are little subrated In many opportunities i felt headwind and good effort and the screen was 160-180 perhaps 200w... in my opinion/feeling/ppv1 this should be for example 220-230w.

Check it when possible, please.

thank you a lot.

[Velocomp]

You adjusted down your weight to 80KG total; that is OK, based on your stated rider weight of 70KG.

I don't see anything wrong with your ride file. Please post a ride file from your V1 and I will see if there are any other differences in your profile.

[kdx200]

John, dont remember the right places now, iam saying in several places for example going 30kmh+ and a perceived good effort the watts was showing SUB 100w (??!!) , in other places with a good effort and some " climb" the watts showed 180w and my legs (very personal but...i know me) were start burning (at least 220-230w to me).

cant compare with the attached file bacause its similar, not the same....but you ask ..you get it!

thank you very much!

[Velocomp]

Comparing your ride files, your profile parameters are the same (a good thing...)

The overall results are comparable, too. Your 9/15 file has slightly more watts and a slightly higher HR.

I don't see any obvious calibration errors in your V3, and I don't see where you are indicating problems.

[kdx200]

John, as i said this is "my opinion" or "my perceived" based on "my history-feelings".

I will continue doing the tracking of my feelings vs watts numbers. Sometimes its difficult to make a stop in the middle of a training session to take a pic of the moment. I always TRY to get a pic in my mind to come here and tell to you, but its impossible or near impossible to remember when i catch home/computer many hours later.
Also always iam very happy with the support here.

thank you.

[Velocomp]

You can look at your ride file for places where you think power is not what you expected. Point those out to me and I will take a look!

[kdx200]

John
since i dont have the PP GPS version/tracking i should be extracting the garmin file, convert it and then use the "merge file" in isaac?

thank you

[Velocomp]

John
since i dont have the PP GPS version/tracking i should be extracting the garmin file, convert it and then use the "merge file" in isaac?

thank you

You can export your Garmin file in .tcx or .gpx format, then merge GPS information into your Isaac file.

[kdx200]

John,
ive merged the files and i cant find the way to zoom in THE MAP. It has no zoon in and zoom out to easy find the correct place or in other words, it is no way to select any part of the track and see the pp data collected in that path-section. The map is always very tiny and impossible to select the section want.

Am i not seeing in the correct way?

thank you

[kdx200]

John, maybe iam a dumb.... can not use the map. I was trying and trying with no result.

Thanks

[Velocomp]

John, maybe iam a dumb.... can not use the map. I was trying and trying with no result.

Thanks

In Isaac you can't zoom in on the map. However, when you highlight a section of your ride file, you'll see that section highlighted in the map.

If you're running Isaac/Mac, you can export the ride file to Google Earth, where you can do all the zooming you want. Unfortunately, right now there is a bug in Isaac/Windows that prevents GE from working

[kdx200]

John, ok thank you.

Today i went to a ride with all my intention to see the watts numbers AND try to remember at least ONE place to tell you.

So, mission accomplished.... i clearly SAW BELOW 100w during some 200-400 meters of steady run (dont measured exactly)... then i continued cycling, my mind in the traingin and as i SAW and RECORD in my mind the place i was happy to tell you.

NOW, iam at home, download the file.... went to the kilometer 6 were the things took place and ....ohhh.... NO SUB 100w!!! whatttttttttt?? it shows at the minimun some 120 and raises to 200w+. This power is more realistic (or the true) that what my legs were perceiving.

So, am i crazy? NO...aim SURE what i saw in the garmin screen.

Always my setup (since the old PPV1) was 0 smoothness and 10 seconds in the Garmin, so i know about the delays. When i talk about watts iam saying that my readings are in a steady state , not doing a sprint or something like that.

Iam attaching the file for you. The place was at the 6,1km to the 7k aprox.

Then i tried to remember some places where i think the watts were less than the " true" but only i can remember is that i was doing some 38kmh apparently no gusts and the power was some 110w+.

Now id like to resolve the misterius

thank you!!

[Velocomp]

I looked at your ride file...calibration looks fine, and your watts when speed is high (38km/h) look fine, too.

I think what may be happening is that you have your Device Power Smoothing set to 0 sec. This basically means that you are seeing completely raw numbers from PP. So, if there is even ONE instant where power is low, your Garmin will show low watts (for an instant).

The 0 sec setting is for diagnostic purposes only; it is not intended for normal riding. I suggest you set it to 3 or 5 seconds. I think your problem will disappear.

[kdx200]

John, i have the garmin set to 10 sec smooth.

Should the pp also have a smooth? 1sec or 3 sec or whatever?

Thank you

[Velocomp]

Set it to 3 seconds

[kdx200]

John,
another long ride.
In many situations i think the watts are underrated... its a round place for about 11,8km with both front and tail wind ..

it was a steady ride and sometimes did a " sprint" .... in the case i can remember about at km34, i put a good effort during a kilometer...watts were in the 200-220 zone..... i " felt" 250w. this is the one i can remember very well.
In many many situations i " felt" 180w and the garmin showed 140-150 or even 160. In the tail wind at the first 50k it was near impossible to get a match between my feelings and the showed numbers. Went in fast and a nice effort to see under 160watts....and very common 140watts. very doubtfull to me.

Then with the wind going stronger (km70 and then) i felt that the watt numbers were ok or matching my feel. The efforts were near hard and the numbers were in that direction (and im taking account that my legs started to be unfresh so the watts should be in a freefalling).

At the end was a strong headwind....finished my ride BUT.....i continued for near a kilometer and came back to record data and see the wind changing direction in the isaac.... well..... it seems that the change is not there...

please, take a look and thank you very much

[Velocomp]

I looked at your ride file:

1) your unit seems to be well-calibrated. Wind speed and slope readings are completely normal

2) You have this set up as a TT bike. Is this correct?

3) I used this website to check your readings.

http://www.aerocoach.com.au/power-from-speed/

The site calculates exactly the number same as your PP measurement! So, either your measurements (bike speed, slope ,wind) are wrong, or your perception is wrong.

4) I see headwinds and tailwinds at the end of your ride, just as you describe

Based on all the above I don't see any measurement basis for concluding your watts are low, unless you are not riding a TT bike.

I appreciate that you feel you are doing more...but the measurements say otherwise. Sorry

[kdx200]

John, very sad to me. Iam getting weaker and weaker.

By the way, regarding the wind: i felt it during more than the half loop (at least 70% of the loop was with headwind as i saw in the flags there) there was headwind and growing as the hours were passing... is this data in the file? did it affected in the performace? i think i had to do a more effort to maintain my poors 150w. Iam seeing your attached image and the wind you set is 0.7kmh (very low as the flags looked like very rigid) and also as a tailwind and not headwind. Can you explain that please?

thank you

[Velocomp]

I picked this section of the ride because conditions (slope and wind and speed) were constant. There was very little headwind early in the ride (blue wind speed is very close to white bike speed).

Your ride file shows headwinds towards the end of the ride (blue wind speed is above white bike speed). Your speed is lower but your watts are about the same (158W).

I think your ride file is totally accurate.